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Black phosphorus (BP) has been recognized as an ideal anode material for fast‐charging lithium (Li)‐ion capacitors (LICs) due to its high theoretical capacity (2596 mAh g−1), appropriate lithiation potential (0.7 V vs Li+/Li) and fast ion diffusion capability. However, large volume change and soluble polyphosphides (LixPs)‐based intermediates during charging‐discharging process seriously deteriorate cycling performance. To address the aforementioned issues, an elaborated design is reported on the binder for BP electrode. The ‐NH2 polar functional group in grafted chitosan (GCS) binder presents strong chemical anchoring effect for both BP and soluble LixPs, achieving superior adhesion force and LixPs constraining capability for enhanced structure integrity of BP electrode. In addition, GCS exhibits strong Li‐ion binding energy that promotes the Li‐ion adsorption at electrode level, leading to a boosted cycle life for BP. As a result, the graphene (G) incorporated BP electrode using GCS binder shows specific capacity of 997.6 mAh g−1 after 400 cycles at 1 A g−1. This study unravels the crucial role of functional groups for binder in high‐performance BP electrode. [ABSTRACT FROM AUTHOR]

The adsorption of anions onto metal surfaces is important in many applications including effective (electro)catalyst design, metal surface modification, and contaminant removal in wastewater treatment. In electrocatalysis, anions can be both reactive intermediates or site‐blocking spectators, where their adsorption strength therefore dictates the rate of reaction. In this work, we have measured the adsorption energy of a series of carboxylic acids on a Pt (111) single‐crystal electrode surface from aqueous solution. We find that the adsorption strength of the carboxylate anion is linearly correlated with its acid‐dissociation constant (pKa) and therefore the heterolytic O−H bond dissociation strength in solution. Using density functional theory modeling, we split the anion adsorption energy into a sum of the adsorption energy and electron affinity of a neutral (carboxyl) radical. Surprisingly, the adsorption energy of the carboxyl radicals are similar and therefore the large difference in electron affinity is what dictates anion adsorption strength; the greater the cost in energy to remove the electron from the anion upon adsorption, the weaker its binding. Therefore, at least within a class of anions with similar structure and surface binding atoms, both electron affinity and acidity are predictive descriptors of adsorption strength. [ABSTRACT FROM AUTHOR]

A hyperbranched ion-imprinted polymer (IIP) material containing multiple selective adsorption sites was synthesized using halloysite nanotubes, methyl acrylate, and ethylenediamine in the presence of a template ion [i.e. Cd (II) heavy metal]. The successful preparation of the Cd-IIP composition was confirmed by FT-IR, XRD, TEM, TGA, and elemental analysis. The polymers exhibited good adsorption of Cd (II) with a maximum adsorption capacity of 64.37 mg•g--1. The imprinting factor (α) for Cd (II) was 2.62 and the selection factor (β) was 1.78, indicating a specific adsorption of Cd (II) ion. The selection coefficients of Cd-IIP for Cd (II)/Pb (II), Cd (II)/Cu (II), Cd (II)/Ni (II), Cd (II)/Cr (III), and Cd (II)/Na (I) also indicated an excellent selectivity of the hyperbranched polymers for Cd (II) in the presence of competitive ions. The removal efficiency remained more than 75% after five cycles of desorption/adsorption. We envision that the HNTs based Cd-IIP has promising applications in the removal of Cd (II) from wastewater. [ABSTRACT FROM AUTHOR]

Interphases, especially the electrochemically formed solid electrolyte interphase (SEI), are significantly important for cycling stability, reaction kinetics and safety of rechargeable batteries. The structure and composition of the electric double layer (EDL) greatly affect the formation of the SEI and the performance of electrodes. However, as far as we know, there is no review discussing the theme specifically. Herein, the recent substantial progress for EDL and its impact on the formation of SEI in rechargeable batteries are reviewed and discussed. Firstly, the specific adsorption of electrolyte components on electrodes' surface and the ionic solvation structure are introduced. Furthermore, various methods for controlling EDL in different electrode systems are described. Finally, the potential future advancements of the SEI through the manipulation of EDL are discussed, aiming to enhance the electrochemical performance of rechargeable batteries. [ABSTRACT FROM AUTHOR]

Molecular imprinting technology has gained increasing attention and application in protein adsorption and separation. Bacterial growth on the imprinted material would reduce the adsorption selectivity and shorten the service life. To solve the above problems, carrier materials (GO‐PEI/MXene wrinkled microspheres) with dual antibacterial ability are constructed for the first time. BSA surface imprinted GO‐PEI/MXene (GO‐PEI/MXene@MIPs) are constructed in this study. The large exterior surface area increases the number of imprinting sites, thereby enhancing the adsorption capacity. The adsorption capacity of GO‐PEI/MXene@MIPs reaches 312.63 ± 22 mg/g with an imprinting factor (IF) of 3.15 within 90 min. Meanwhile, GO‐PEI/MXene@MIPs can separate BSA from mixed protein solution and fetal bovine serum (FBS) and only loses 14.1% of saturation adsorption after eight cycles. In addition, antibacterial tests show that the material has excellent broad‐spectrum antibacterial effects, which will significantly extend the service life of the material in real‐world environments. [ABSTRACT FROM AUTHOR]

The results of 4-aminopyrimidine (4-APM) impact studies on the double layer parameters at the R-AgLAFE/chlorates(VII) interface in the solutions with different water activity as well as different properties of the mixed adsorption layer of 4-aminopirimidine - sodium 1-decanesulfonate (SDS) and 4-aminopyrimidine - hexadecyltrimethylammonium bromide (CTAB) at the electrode/solution interface are discussed. The differential capacity of the double layer (Cd) at the R-AgLAFE/basic solution interface was measured using the electrochemical impedance spectroscopy. The zero charge potential (Ez) was determined using a streaming electrode, while the surface tension at the zero charge potential (Yz) was measured using the largest pressure method inside the mercury drop. It was proved that both the 4-aminopirymidine concentration and water activity have an essential effect on the doublelayer parameters on the R-AgLAFE/chlorates(VII) interface. In the studied systems: 4-APM - SDS and 4-APM - CTAB, 4-aminopyrimidine dominance was observed. [ABSTRACT FROM AUTHOR]

• The formation mechanism, polymerization process, sensing strategies, and applications of MIP- and IIP-based chemical sensors were introduced. • The latest studies on MIP- and IIP-based chemical sensors were involved. • The challenges and possible solutions were discussed. Chemical assays play an important role in environmental monitoring, disease diagnosis, and food safety, which rely on the design of sensitive, specific, and low-cost chemical sensors. Molecularly and ionically imprinting polymers (MIPs and IIPs) are synthetic polymer-based materials that mimic antibodies to bind with targets with high selectivity and strong affinity. Their unique properties make them promising to be chemical sensors for the anticipated chemical assays. Herein, we overview the attractive chemical assay platforms made by MIPs and IIPs. All aspects of the MIP- and IIP-based chemical sensors, including the formation mechanism, polymerization process, sensing strategies, and applications, were discussed in detail. Finally, we point out the current challenges. We believe this review can provide helpful knowledge and inspire researchers to design novel MIP- and IIP-based chemical sensors that match actual applications. Abbreviations: 3-AAPBA, 3-(acrylamido) phenylboronic acid; 3-MT, 3-methoxytyramine; 4-NP, 4-nitrophenol; 4-VP, 4-vinylpyridine; 5-HT, 5-hydroxytryptamine; AA, ascorbic acid; AIBN, azobisisobutyronitrile; APO-type, immature nanocavity; APTES, (3-Aminopropyl)triethoxysilane; BPA, bisphenol A; BSA, bovine serum albumin; CD, carbon dot; CDNF, cerebral dopamine neurotrophic factor; CIP, cell-imprinted polymer; CIT, citrinin; CLIA, chemiluminescent immunoassay; COVID-2019, Coronavirus Disease of 2019; CPS, carboxylic-terminated polystyrene; CS, chitosan; CTAB, cetyl trimethyl ammonium bromide; DA, dopamine; DET, direct electron transfer; DHPG, 3,4-dihydroxyphenylethanol; DLS, dynamic light scattering; DOPAC, 3,4-dihydroxyphenylacetic acid; DTA, N-(1,4-dioxo-1,2,3,4-tetrahydrophthalazin-5-yl)acrylamide; DVB, divinylbenzene; ECLS, electrochemiluminescence sensor; EDTA, ethylenediamine tetraacetic acid disodium salt; ELISA, enzyme-linked immunosorbent assay; EP, epinephrine; Ex, excitation; Em, emission; FL, fluorescence; FL-AuNPs, flower-like gold nanoparticles; FSA, 4-formylsalicylic acid; g-CdTe, green-emitting CdTe; GCE, glassy carbon electrode; GQD, graphene quantum dot; Glu, glutamic acid; Hb, hemoglobin; HD, hexadecane; HOLO-type, mature nanocavity; HOMO, highest occupied molecular orbital; HAS, human serum albumin; HVA, homovanillic acid; ICPTS, 3-isocyanatopropyltriethoxysilane; IP, imprinted polymer; IIHB, ion-imprinted hydrogel bead; IIP, ionically imprinted polymer; IOHP, inverse opal hydrogel particle; LC, λ-cyhalothrin; LOD, limit of detection; LUMO, lowest unoccupied molecular orbital; Lyz, lysozyme; MBA, 4-mercaptobenzoic acid; MCNTs, magnetic carbon nanotubes; MCNTs@D-EMIP, MCNTs@MPS coated with dual-template epitope imprinting molecular polymer; MCNTs@MPS, MCNTs@SiO 2 coated with MPS; MCNTs@SiO 2 , MCNTs coated with a silicon layer; MHPG, 3-methoxy-4-hydroxyphenylglycol; MIP, molecularly imprinted polymer; MMIP, magnetic molecularly imprinted polymer; MOF, metal–organic framework; MPA, 3-mercaptopropionic acid; MPS, 3-methacryloyloxypropyltrimethoxysilane; NIHB, non-imprinted hydrogel bead; NIP, non-imprinted polymer; NP, nanoparticle; norepinephrine; PABA, P-aminobenzoic acid; Pc, phthalocyanine; Pd-imp@CDs-Pc, palladium ion-imprinted organosiloxane nanoparticles with both phthalocyanine dye and carbon dot; PDMS, polydimethylsiloxane; PS, polystyrene; PVB, polyvinyl butyral; Pyr, pyruvic acid; QD, quantum dot; r-CdTe, red-emitting CdTe; R ct , charge transfer resistance; SCCB, silica colloidal crystal bead; SDS, sodium dodecyl sulfate; SEM, scanning electron microscope; SPR, surface plasmon resonance; SWV, square wave voltammetry; TCID50, tissue culture infectious dose 50; TEGDMA, triethylene glycol dimethacrylate; TEOS, tetraethyl orthosilicate; UA, uric acid; UV, ultraviolet; VIP, virus-imprinted polymer; VMA, vanillylmandelic acid. [ABSTRACT FROM AUTHOR]

[Display omitted] • Ionic liquid ([Bpy][Sal]) modified MOF was synthesized to adsorb antiviral drugs. • Specific adsorption of Arbidol and Favipiravir on [BPy][Sal]@MOF was investigated. • [BPy][Sal]@MOF showed higher adsorption selectivity toward Arbidol. • DFT calculation was employed to reveal the specific adsorption mechanism. • [BPy][Sal] played an important role in the specific adsorption of [BPy][Sal]@MOF. As emerging contaminants, antiviral drugs (ATVs) in water pose an increasing threat to human health and the ecosystem. Using specific and selective adsorption methods to remove ATVs remains challenging due to their trace concentration in real matrices. In this study, pyridine ionic liquid ([BPy][Sal])-modified metal–organic framework (MOF), a type of novel material, was synthesized as [BPy][Sal]@MOF to adsorb ATVs with different molecular structures, i.e., Arbidol (Arb) and Favipiravir (Fav). Arb adsorption followed the pseudo-second-order model, indicating that chemisorption is the dominant process. The Langmuir isothermal model showed that the maximum adsorption capacities toward Arb and Fav were 506.9 and 35.3 mg g−1, respectively, suggesting specific adsorption of Arb on [BPy][Sal]@MOF. Density functional theory (DFT) was used to investigate the specific adsorption mechanism. The molecular electrostatic potential and the intermolecular weak interaction analysis using the DFT method illustrated that the amino hydrogens in MOF could form hydrogen bonds (N H O) with the hydroxyl oxygens in Arb. Simultaneously, the indole ring in Arb could cause π–π interaction with the pyridine ring in [BPy][Sal] part from [BPy][Sal]@MOF. In contrast, the adsorption of Fav only involved π–π interaction between the benzene rings in Fav and the MOF part from [BPy][Sal]@MOF. The adsorption energy and energy gap calculation results verified that the adsorption strength of Arb was higher than that of Fav, and the key role of [BPy][Sal] in [BPy][Sal]@MOF helped achieve specific adsorption was confirmed. [BPy][Sal]@MOF exhibited exceptional recyclability after five adsorption–desorption cycles in environmental waters, demonstrating its excellent adsorption performance in practical applications. [ABSTRACT FROM AUTHOR]

Alkylresorcinols are important biomarkers for evaluating whole wheat foods. However, their structures encompass a broad spectrum of homologs, making isolating and analyzing individual alkylresorcinol notably challenging. Herein, we synthesized highly selective molecularly imprinted polymers (MIPs) utilizing a facile and cost-effective precipitation polymerization method and 5-heneicosylresorcinol (AR C21:0) as the template molecule. Various crucial preparation parameters were systematically optimized, such as different porogens, functional monomers, imprinting ratios, and polymerization time. The polymers were characterized through scanning electron microscopy and Fourier transform infrared spectroscopy, and their adsorption performances were thoroughly evaluated. MIPs exhibited a notably enhanced adsorption capacity compared with that of non-imprinted polymers, reaching an optimal adsorption amount of 71.75 mg·mL−1 and imprinting factor of 2.02. Altogether, the synthesized MIPs showed superior affinity and selectivity for AR C21:0 , as confirmed by their selective extraction, suggesting their potential applications in the analysis, separation, and monitoring of AR C21:0 in whole wheat foods. [Display omitted] • Successful synthesis of MIPs based on 5-heneicosylresorcinol (AR C21:0). • Investigation into the preparation conditions and adsorption mechanisms of MIPs. • Demonstrated significantly enhanced adsorption capacity of MIPs compared to NIPs. • Superior affinity and selectivity of the obtained MIPs. • Application of MIPs for the selective extraction of AR C21:0 from actual samples. [ABSTRACT FROM AUTHOR]

Lithium bis(trifluoromethanesulphonyl)imide (LiTFSI) with outstanding electrochemical and thermal stability has promising applications in electrolytes for lithium batteries. However, a low concentration of the sulfonimide salt electrolyte can corrode a commonly used aluminum (Al) current collector, posing a perennial conundrum that hinders its wide application. In this work, we find that pure H 2 O as an additive in the 1 M LiTFSI electrolyte effectively protects the Al current collector from corrosion by TFSI−. The interface engineering by specific adsorption of H 2 O plays a pivotal role in regulating the structure of the electrical double layer on the Al foil surface, blocking the interaction of TFSI− with Al. Meanwhile, hydrogen bonds are verified between H 2 O and TFSI−, weakening the attack of TFSI− on the Al collector and improving the Li+ conductivity. The mechanism has been confirmed by theoretical calculations and a variety of characterizations. Benefiting from the addition of H 2 O, the lithium batteries exhibit excellent cycling performance at a high cut-off voltage of 4.4 V even at −20 °C and a 3 Ah pouch full cell shows long cycling performance. The results demonstrate the high compatibility of the H 2 O-added electrolyte with high voltage cathode, lithium metal and graphite anodes. This work introduces a strategy for the utilization of sulfonimide salt at high voltage and wide temperature even at a low concentration. [Display omitted] • H 2 O is utilized as electrolyte additive to inhibit the Al corrosion by TFSI−. • The existence of H 2 O modulates the electrical double layer on the electrode surface. • Lithium metal batteries exhibit outstanding performance at both room and low temperatures with H 2 O as additive. • Hydrogen bonds can form between H 2 O and TFSI- within the Li+ solvation shell. [ABSTRACT FROM AUTHOR]

To achieve efficient adsorption and recycling of Cu2+ in wastewater, using Cu2+ as template ion, glutaraldehyde as crosslinker, three sodium alginate hydrogel beads including SA, SAC, and SAB beads were prepared by imprinting sol–gel method using sodium alginate (SA) with carboxymethyl cellulose (CMC) and β-cyclodextrin (β-CD) as different precursors, respectively. Scanning electron microscopy and Fourier transform infrared spectroscopy were used to characterize and analyze morphology and composition change of the hydrogel beads, respectively. When the mass ratio of SA to CMC or SA to β-CD reach 1:1, the SAC beads or SAB beads are nearly homogeneous sphere. Then the effects of pH, adsorption time, initial concentration of Cu2+, adsorbent dosage, and coexisting ions on the adsorption efficiency of three hydrogel beads were investigated. The results indicated that adding carboxymethyl cellulose and β-cyclodextrin into skeleton of beads increased the toughness of the beads and improved the adsorption capacity of Cu2+. Compared to the saturated adsorption capacity 510 mg/g of Cu2+ on SA, the saturated adsorption capacity of Cu2+ on SAB and SAC reached 817 mg/g and 822 mg/g, respectively. And their adsorption efficiency for Cu2+ are over 95% at 25 °C with pH of 7, contact time within 350 min, adsorbent dosage of 4 mg/50 mL, and initial concentration of 5 mg/L. Thus, SAC and SAB beads could be used as adsorption material for detecting and removing Cu2+ from wastewater. [ABSTRACT FROM AUTHOR]

The development of two-dimensional (2D) layered MXene materials has opened new possibilities for gas adsorption applications due to their high specific surface area, tunable surface chemistry, and excellent selectivity towards specific gases. These materials exhibit tremendous potential in adsorption-based gas separation and detection, particularly due to their strong interactions with target gas molecules, making them highly effective in gas removal and detection applications. However, currently available methods for synthesizing these oxidized nanocomposite inks are limited by the typically high temperatures involved. The present work addresses this issue by developing titanium dioxide and MXene (TiO 2 /Ti 3 C 2 MXene) nanocomposite inks, where TiO 2 nanoparticles are formed between the layers of the Ti 3 C 2 MXene via oxidation in solution state under extended exposure in an oxygen rich atmosphere at room temperature. As a proof of concept, gas adsorption studies are conducted by applying the TiO 2 /Ti 3 C 2 MXene nanocomposite inks onto gold-coated silicon wafers via an ultrasonic spray printing method. The gas adsorption results demonstrate that the TiO 2 /Ti 3 C 2 MXene nanocomposites possess excellent adsorption selectivity toward methane and butane among alkane gases, and can achieve maximum adsorption capacities of 8.62 and 18.8 cm 3 /g, respectively. The results of ultrasonic spray printing quality tests conducted for different numbers of printed layers using the proposed TiO 2 /Ti 3 C 2 MXene nanocomposite ink demonstrate that the film thickness can be regulated by controlling the number of printed layers, and the average thin film thickness remains only 0.313 μm for 10 printed layers. Meanwhile, the average roughness of the films resides between 0.130 μm (3 layers) and 0.220 μm (8 layers), which is uniformly and less than the average roughness of 0.225 μm measured for the original gold-plated silicon wafer. Hence, by employing facile ink-based printing techniques, such as ultrasonic spray printing, thin films with controlled thickness can be fabricated, thereby laying the foundation for their practical applications in environmental monitoring and industrial gas separation., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Inc. All rights reserved.)

[Display omitted] Hypothesis. The origin of the negative charge at water/air interface was proved to be not only specific adsorption of OH– ions but that of HCO 3 – and/or CO 3 2– ions in the previous study [1]. To determine which anionic species is primarily responsible for the surface charge, the surface density of ions in the Stern layer is numerically evaluated from foam-film thickness of aqueous solutions of NaHCO 3 and Na 2 CO 3. Experiments. Equilibrium thickness (equivalent thickness at equilibrium) of the foam films formed from aqueous solutions of NaHCO 3 and Na 2 CO 3 was measured as a function of electrolyte concentration at 298.15 K. Findings. Applying a modified Poisson-Boltzmann (PB) equation developed for various kinds of electrolytes to the equilibrium thickness gave the surface density of ions in the Stern layer for NaHCO 3 and Na 2 CO 3 systems. From the concentration dependence of the surface density together with that for NaCl and NaOH in the previous study [1] , the negative surface charges for water and very dilute solutions were found to be due to specific adsorption of HCO 3 – ions. The surface charge at high electrolyte concentration is determined by the specific adsorption of electrolyte anions. The specific-adsorption ability of anion increases in the order CO 3 2– ≫ HCO 3 – > OH– ≫ Cl-. [ABSTRACT FROM AUTHOR]

[Display omitted] • A novel photocatalyst (Fe 3 O 4 @mTiO 2 -Ag-CNTs-MIPs) for SA degradation was prepared. • Doping with Ag and CNTs extended the light absorption of TiO 2 into visible region. • MIPs achieved selective adsorption of SA thus improving photodegradation efficiency. • The degradation rate of SA by Fe 3 O 4 @mTiO 2 -Ag-CNTs-MIPs was up to 98.41%. • Fe 3 O 4 @mTiO 2 -Ag-CNTs-MIPs maintained 87.12% of SA removal rate after five cycles. A novel magnetic molecularly imprinted mesoporous TiO 2 co-doped with silver nanoparticles and carbon nanotubes (Fe 3 O 4 @mTiO 2 -Ag-CNTs-MIPs), was successfully prepared for the selective adsorption and photodegradation of salicylic acid (SA). The morphological and physicochemical properties of the prepared composite were characterized by SEM, FT-IR, XRD, VSM, UV–Vis DRS, EIS and XPS. The adsorption and photodegradation performance of Fe 3 O 4 @mTiO 2 -Ag-CNTs-MIPs towards SA was investigated. The results showed that Fe 3 O 4 @mTiO 2 -Ag-CNTs-MIPs could achieve the specific adsorption of SA with the selectivity coefficient higher than 2. Compared with Fe 3 O 4 @mTiO 2 , the photodegradation efficiency of Fe 3 O 4 @mTiO 2 -Ag-CNTs-MIPs for SA under visible light was significantly improved, indicating that the doping of CNTs and Ag together with the loading of MIPs could enhance the photocatalytic performance of the prepared composite. Under the irradiation of visible light (300 W) for 150 min, the degradation rate of SA (5 mg/L) in 50 mL of solution (pH 3) by Fe 3 O 4 @mTiO 2 -Ag-CNTs-MIPs (15 mg) was up to 98.41 %. Moreover, the degradation rate of the recovered Fe 3 O 4 @mTiO 2 -Ag-CNTs-MIPs for SA was still 87.12 % after five cycles. The primary active species for the photodegradation of SA by Fe 3 O 4 @mTiO 2 -Ag-CNTs-MIPs were O 2 ∙ - and h+, and the potential degradation pathways of SA were elucidated by high-resolution UPLC-MS. Overall, this study constructed a promising photocatalyst Fe 3 O 4 @mTiO 2 -Ag-CNTs-MIPs, which was expected to effectively degrade the pollutant SA in wastewater treatment. [ABSTRACT FROM AUTHOR]

• Two fluorinated COFs were facilely synthetized. • Which showed specific adsorption and capture capacity for phenolic contaminants from aqueous medium. The specific removal of phenolic pollutants from aqueous medium based on the functionalized materials are great significant for the adsorption processes. The purposes of this work were to fabricate fluorine-containing covalent organic frameworks (COFs) sorbent with hydrophobic function and hydrogen bond acceptor capacity to investigate the key role of fluorine functional group in the sorption behavior for phenolic pollutants in the aqueous solutions. Here, two fluorinated COFs, named TFPT-PI-CF 3 and TFPT-PI-2CF 3 , were facilely synthetized through the imine condensation reaction between tri -aldehyde and diamine pre-modified by trifluoromethyl group. The adsorption isotherms, kinetics, thermodynamic, and reusability of tow COFs for the adsorption and capture of prevalent phenolic contaminants (hydroquinone, catechol, resorcinol, phenol, and acetaminophen) from aqueous solution were inspected in detail. The maximum adsorption capacity for TFPT-PI-CF 3 and TFPT-PI-2CF 3 was calculated to be 576 and 567 mg·g−1 for hydroquinone by using linear Langmuir isotherm as an appropriate model, respectively. Adsorption mechanisms highlighted the synergistic effects of F–H hydrogen bonding and hydrophobic interactions as important design criteria for efficient removal of phenolic pollutions from water medium. Furthermore, the prepared fluorinated COFs were successfully applied to evaluate five phenolic contaminants in real water samples, which demonstrated that the fluorine-containing materials held great promise for the development of an accurate platform for the rapid removal of the hydroxyl contaminants. [ABSTRACT FROM AUTHOR]

Lithium‐metal (Li) electrode has been regarded as an excellent option to increase the energy density of next‐generation secondary batteries due to its low electrochemical potential and ultrahigh theoretical capacity. However, Li electrodes suffer from poor Coulombic efficiency (CE) and uneven lithium deposition issues during cycling that severely restrain its application. Herein, ammonium perfluoro(2‐methyl‐3‐oxahexanoate) (APFA), a pragmatic anionic surfactant, is introduced as an electrolyte additive to regulate the deposition behavior of lithium. Different from the conventional sacrificial additives that reinforce solid electrolyte interphase (SEI) layers on Li electrodes, the PFA− anions are mainly adsorbed on the Li surface, which improves the electron transfer step kinetics due to the ψ1 effect. The introduction of APFA in the electrolyte promises homogeneous and highly dense lithium deposition and the LiLi symmetric cell with APFA can operate over 4000 h with excellent stability and low polarization. This work provides a facile and promising strategy for fabricating stable Li anode for high‐energy‐density secondary batteries. [ABSTRACT FROM AUTHOR]

[Display omitted] • A novel bilirubin adsorbent based on collagen and chitosan was designed and synthesized. • The adsorption capacity for bilirubin by the CS-Col microspheres increases from 24.2 to 76.9 mg/g. • The adsorption rate for albumin by the CS-Col microspheres declines from 6.9% to 2.6%. • Collagen gives the CS-Col microspheres specific bilirubin adsorption capacity. Hemoperfusion is one of the most effective treatments for the removal of bilirubin from the blood. Chitosan (CS) has been widely investigated as a hemoperfusion adsorbent to remove bilirubin due to its biocompatibility and biodegradability. However, the limited adsorption capacity of CS for free bilirubin or albumin-rich bilirubin solution, and the strong adsorption for albumin, limit its extensive use. The goal of this work is to improve specific bilirubin adsorption of CS while reducing its adsorption for albumin. In this study, collagen (Col) was chosen as a ligand and grafted onto the surface of CS microspheres to form CS-Col microspheres and therefore to improve their adsorption performance for bilirubin. The maximum adsorption capacity of the CS-Col microspheres for bilirubin increases from 24.2 to 76.9 mg/g. The enhancement factor is higher than that of other CS-based adsorbents. Moreover, the adsorption of CS-Col microspheres for albumin is effectively reduced to 2.6 %, while maintaining good blood compatibility. Compared to other CS-based bilirubin adsorbents, our CS-Col microspheres have the advantage of specific adsorbing bilirubin against albumin due to introducing collagen. This work provides new directions for designing high-performance bilirubin adsorbents. Our CS-Col microspheres show great promise for the treatment of hyperbilirubinemia. [ABSTRACT FROM AUTHOR]

• Selective depression of quartz flotation by 20 mg/L of TETA at pH 10 was reduced from 92.2 % to 22.5 % in carbonate ionic liquid. • ICP and zeta potentials revealed that selectively adsorbed TETA altered the setting on the quartz surface to the preferential adsorption of NaOL on the smithsonite surface. • XPS and QCM-D support that TETA effectively forms new complexes with Zn 5 (OH) 6 (CO 3) 2 (s) and chemisorbs at the quartz interface. • TETA's N hybridizes to generate covalent bonds with Zn on the Zn-quartz surface and ionic bonds with Zn on the smithsonite. In order to induce alterations in the mineral surface's hydrophobicity and subsequently separate smithsonite from quartz, the current study introduces an innovative amine depressant termed triethylenetetramine (TETA). Micro-flotation experiments clearly demonstrated that adding a relatively modest dosage (20 mg/L) of TETA at pH 10 reduced the recovery of quartz from 92.2 % to 22.5 % without reducing the recovery of smithsonite. ICP-OES and zeta potentials revealed that TETA selectively adsorbed on the quartz surface effectively reduced Zn2+ dissolution and altered the setting of the quartz surface to preferentially adsorb NaOL on the smithsonite surface. X-ray photoelectron spectroscopy (XPS) and Quartz crystal microbalance with dissipation (QCM-D) analyses support that TETA is more susceptible to Zn atoms in Zn 5 (OH) 6 (CO 3) 2(s) through a bonding process and preferentially chemisorbs on the quartz surface to the exclusion of Zn-CO 3 on the smithsonite surface. Density functional theory (DFT) calculations revealed that electron acceptance by Zn and electron loss by N resulted in hybridization reactions between Zn 2 s, 3d, 4p and N 2p orbitals to form stable Zn-N covalent bonds. Chemical bonds characterized by ionic bonding were formed between TETA and Zn atoms on the cleavage plane of smithsonite, which led to the susceptibility of TETA adsorption on the surface of smithsonite to be broken. [ABSTRACT FROM AUTHOR]

Bacterial polysaccharides get an abundance of attention owing to their distinctive biological activity and promising applications. Recent research found that the specificity of the molecular structure of exopolysaccharides (EPS) can be used to accomplish selective regulation of the physicochemical properties of mineral surfaces. The development and application of novel microbial EPS as a flotation reagent for chalcopyrite and molybdenite separation possesses a promising development prospect. Consequently, we attempted to create effective and sustainable molybdenite depressants in this work by optimizing the strain's fermentation settings and identifying the molecular structure of the generated EPS. Fermentation condition tests revealed patterns of influence of fermentation parameters on EPS yield, the viscosity average molecular weight, and biomass during the fermentation process, and optimized the optimal fermentation conditions. Fourier transform infrared (FTIR), nuclear magnetic resonance (NMR), and ion chromatography (IC) analyses clarified the structure of the EPS in terms of monosaccharide composition, glycosidic bonding, and functional groups. Mixed mineral flotation tests proved that a low dosage of polysaccharide reagent (100 mg/L) at pH 10 effectively inhibited molybdenite and achieved separation targets of 21.96% Cu and 2.63% Mo in the concentrate, with separation efficiencies (SE) of 72.67% and 55.78% for Cu and Mo, respectively. [ABSTRACT FROM AUTHOR]

Interactions of electrolyte ions at electrocatalyst surfaces influence the selectivity of electrochemical CO2 reduction (CO2R) to chemical feedstocks like CO. We investigated the effects of anion type in aqueous choline halide solutions (ChCl, ChBr, and ChI) on the selectivity of CO2R to CO over an Ag foil cathode. Using an H‐type cell, we observed that halide‐specific adsorption at the Ag surface limits CO faradaic efficiency (FECO) at potentials more positive than −1.0 V vs. reversible hydrogen electrode (RHE). At these conditions, FECO increased from I−90 %) in ChCl (at −0.75±0.06 Vvs. RHE) and ChI (at −0.78±0.17 V vs. RHE) could be achieved at a current density of 150 mA cm−2 in a continuous flow‐cell electrolyser with Ag nanoparticles on a commercial gas diffusion electrode. This study provides new insights to understand the interactions of anions with catalysts and offers a new method to modify electrocatalyst surfaces. [ABSTRACT FROM AUTHOR]

This work presents a comprehensive study on chromate ions (CrO42-) removal from aqueous solutions for different levels of alkalinity in the natural mordenite zeolite from Palmarito de Cauto deposit. The Surface charge density and zero charge point (p.z.c.) values of the zeolite were determined, which lead to outline that these ions are adsorbed on this mineral in a specifically form and it was associated with the formation of an electric layer double. Through atomic emission spectroscopy, infrared spectroscopy (FT-IR) and scanning electron microscopy (MEB) with EDX was showed that this zeolite removes chromium from the aqueous solutions of chromate ions and it occurs independently of its basicity level. The mineral has a significant neutralizing effect on alkaline solutions. The results provide information that expands the useful potential of an abundant natural resource, with low cost and great accessibility. [ABSTRACT FROM AUTHOR]

Purpose: To evaluate the adsorption capacity of aluminum-modified biochars for arsenate (As(V)) and the effect of the biochars on As(V) adsorption by acidic Ultisols. Materials and methods: Rice straw was collected from Yingtan, Jiangxi Province. Rice straw and the biochar derived from rice straw were both treated with aluminum (Al) to prepare two kinds of Al-modified biochars. An Ultisol was collected from Jinxian, Jiangxi Province, and an indoor incubation was used to prepare biochar-ameliorated soil. Zeta potential and Fourier transform infrared spectroscopy (FTIR) were used to characterize the effects of Al modification on surface charge and functional groups of the biochars. The batch method was used to investigate the adsorption and desorption of As(V) by the biochars and the soil. Arsenic in equilibrium solution was determined using hydride generation–atomic fluorescence spectrometry. Results and discussion: The yield of biochar derived from Al-treated rice straw was significantly greater than that of the biochar from untreated rice straw. The Al content of Al-treated biochar from rice straw was higher than that of biochar derived from Al-treated rice straw. Modification did not change the morphology of Al oxide on biochar. Zeta potential of the two modified biochars changed to a positive value compared with that of unmodified biochar, and more change in zeta potential was observed for the Al-treated biochar from rice straw than that of biochar derived from Al-treated rice straw. After As(V) was adsorbed by the two modified biochars, new absorption peaks were found in the FTIR spectra from the biochars at 892 cm−1 (biochar from Al-treated rice straw) and 884 cm−1 (Al-treated biochar from rice straw). The peaks suggested that a chemical bond was formed between As(V) and Al on biochars during As(V) adsorption. The two Al-modified biochars adsorbed much more As(V) than the unmodified biochar. The desorption of adsorbed As(V) in the modified biochars was very low, which indicated that specific adsorption was the dominant mechanism for As(V) adsorption. The addition of modified biochar promoted the adsorption of As(V) by the Ultisol. Moreover, Al-treated biochar from rice straw enhanced As(V) adsorption by the soil more than the biochar derived from Al-treated rice straw. Conclusions: Compared with the effect of adding unmodified biochar, adding either of the two Al-modified biochars significantly enhanced the adsorption of As(V) by the Ultisol. Therefore, Al-modified biochar can be used to immobilize As(V) in arsenic-contaminated soils, especially in acidic soils. [ABSTRACT FROM AUTHOR]

The electrode/electrolyte interface plays a critical role in stabilizing the cycling performance and prolonging the service life of rechargeable batteries to meet the sustainable energy requirements of the mobile society. The understanding of interfaces is still at the preliminary stage due to the limited research techniques and variable properties with time and potential. Herein, the latest developments focused on the interfaces in rechargeable systems including the cathode electrolyte interphase (CEI) and solid electrolyte interphase (SEI) are reviewed. The possible formation mechanisms of the electrode/electrolyte interface are discussed, followed by the introduction of two key influencing factors, specific adsorption and solvated coordinate structure, which will dominate the formation of the interface. Finally, the structure and chemical composition of the interface as well as the possible transport mechanism of lithium ions in the interface and the strategies to regulate the pathway through the interface are presented in detail. This work sheds light on the fundamental understanding of the interface and provides rational scientific principles in designing the electrode/electrolyte interface and inspires the rational design of long‐term cycling rechargeable batteries. [ABSTRACT FROM AUTHOR]

The origin of negative surface charge at water/air interface is still not clear. The most probable origin is specific adsorption of OH− ions. From diffuse layer potential, we can evaluate the surface density of ions in the Stern layer which can be a measure for the specific adsorption of ions and determines whether the surface charge is solely due to the specific adsorption of OH− ions. Equilibrium thickness of foam films of pure water and aqueous solutions of NaCl, HCl, and NaOH was measured as a function of disjoining pressure for water and as a function of concentration for the aqueous solutions at 298.15 K. Quartz-glass cells thoroughly cleaned and immersed in pure water before use were used for the measurement. Application of a modified Poisson-Boltzmann equation to the equilibrium film thickness gave the diffuse layer potential and the surface density of ions in the Stern layer. From the concentration dependence of the surface density, it was concluded that not only OH− ions but also Cl− ions and HCO 3 − and/or CO 3 2− ions adsorb specifically at the water/air interface. [ABSTRACT FROM AUTHOR]

The electric double layer (EDL) has been found to play a critical role in not only electric double-layer capacitors (EDLCs) but also batteries and electrocatalysts. Although the influence of EDLs on the electrochemical behaviors of electrolytes has been extensively investigated, its influence on the electrode itself, particularly the energy storage mechanism, remains unclear. Herein, using popular α-Fe 2 O 3 , we look into the interaction between electrode and EDL and find the energy storage mechanism of an electrode can be tuned by modulating EDL. The EDL, which is mainly influenced by the inner Helmholtz plane (IHP) through the specific adsorption of ions onto the surface of Fe 2 O 3 , determines which ions are present at the interface and how they react with the electrode. Ultimately, the composition and properties of the EDL determine the energy storage mechanism of an Fe 2 O 3 electrode, including conversion reaction, ions insertion, surface redox reaction and pseudocapacitance. Our results not only provide a new understanding on the nature of the EDL but also demonstrate that the EDL should be promoted as a functional "component" which can be designed for achieving the optimum synergy of an electrode-electrolyte interface. [Display omitted] [ABSTRACT FROM AUTHOR]

[Display omitted] • CN-enriched and -activated cobalt hexacyanoferrate was prepared by (2 2 0) crystal facet engineering. • CoHCF (2 2 0) presented excellent adsorption ability for ultra-low concentration (1 ppm) of Pt(Ⅱ). • Enrichment and activation of CN resulted in a strong coordination interaction with Pt(Ⅱ). • The used sorbent could be reduced as HER photocatalyst for full utilization Pt secondary resource. Adsorption recovery of ultra-low concentrations (1 ppm) of platinum (Pt) was challenging due to the inferior sensitivity response and poor specific affinity between sorbents and target ions. Herein, enrichment and activation of the cyano group (CN) on cobalt hexacyanoferrate (CoHCF) were achieved by crystal facets engineering to capture Pt(Ⅱ) efficiently and specifically. The Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and density-functional theory (DFT) calculations results revealed that the activity and density of CN on the (2 2 0) facets were higher than that on the (2 0 0) facet. The Pt(Ⅱ) adsorption efficiency on the CN-enriched and -activated CoHCF (CoHCF (2 2 0)) reached 92.5%, which was 1.56 times higher than that on the original CoHCF (59.2%). The specific adsorption of Pt(Ⅱ) was driven by the coordination interaction between Fe-CN– and Pt, leading to the Pt(Ⅱ)-Pd(Ⅱ) separation efficiency attained 98.95% within 20 min. In addition, CoHCF (2 2 0) equipped with Pt(Ⅱ) could be further chemically reduced as a photocatalyst for hydrogen evolution. This study suggested an attractive strategy for the practical recovery of Pt(Ⅱ) and comprehensive utilization of ultra-low concentration Pt-containing wastewater. [ABSTRACT FROM AUTHOR]

A hyperbranched ion-imprinted polymer (IIP) material containing multiple selective adsorption sites was synthesized using halloysite nanotubes, methyl acrylate, and ethylenediamine in the presence of a template ion [i.e. Cd (II) heavy metal]. The successful preparation of the Cd-IIP composition was confirmed by FT-IR, XRD, TEM, TGA, and elemental analysis. The polymers exhibited good adsorption of Cd (II) with a maximum adsorption capacity of 64.37 mg·g -1 . The imprinting factor (α) for Cd (II) was 2.62 and the selection factor (β) was 1.78, indicating a specific adsorption of Cd (II) ion. The selection coefficients of Cd-IIP for Cd (II)/Pb (II), Cd (II)/Cu (II), Cd (II)/Ni (II), Cd (II)/Cr (III), and Cd (II)/Na (I) also indicated an excellent selectivity of the hyperbranched polymers for Cd (II) in the presence of competitive ions. The removal efficiency remained more than 75% after five cycles of desorption/adsorption. We envision that the HNTs based Cd-IIP has promising applications in the removal of Cd (II) from wastewater., (© TÜBİTAK.)

The pH-dependent surface charging of tellurium (IV) oxide has been studied. The isoelectric point (IEP) of tellurium (IV) oxide was determined by microelectrophoresis in various 1-1 electrolytes over a concentration range of 0.001–0.1 M. In all electrolytes studied and irrespective of their concentration the zeta potential of TeO2 was negative over the pH range 3–12. In other words the IEP of TeO2 is at pH below 3 (if any). TeO2 specifically adsorbs ionic surfactants, and their presence strongly affects the zeta potential. In contrast the effect of multivalent inorganic ions on the zeta potential of TeO2 is rather insignificant (no shift in the IEP). In this respect TeO2 is very different from metal oxides.

Understanding the pH dependent shift of the oxidation peak of the underpotential deposited hydrogen (Hupd) in cyclic voltammograms on the Pt surface is of significance in terms of both the fundamentals of electrochemistry and the rational design of catalysts for the hydrogen oxidation/evolution reactions (HOR/HER). In this work, we provide compelling evidence that the pH dependent shift in the Hupd peak on Pt surfaces is driven by the structure of interfacial water rather than the specific adsorption of cations on the electrode surface. Combined cyclic voltammetric and surface enhanced spectroscopic investigations using an organic cation and crown‐ether chelated alkali metal cations show that specific adsorption of metal and organic cations on the Pt surface at the conditions relevant to the HOR/HER is unlikely. The vibrational band corresponding to strongly bound water is monitored when the electrode potential is varied in the Hupd range in both acid and base. [ABSTRACT FROM AUTHOR]

Nanostructured gold electrodes have been widely used for electrochemical trace analysis of Hg2+ because Hg2+ has superior specificity for the formation of gold amalgam. However, it is still very challenging to achieve both high sensitivity and reproducibility, especially for real environmental water samples due to surface poisoning by organic residues. In this work, we developed two strategies for addressing these challenges. First, we added NaBr (with a final concentration of 0.01 M) to the analytes; this enhanced the sensitivity by two orders of magnitude and improved the reproducibility to be better than RSD <15% because of the synergetic interaction of Br− with Hg2+ and gold at the interface. Second, we developed a pre-oxidation method using a glassy carbon electrode to remove organic residue from the analyte before Hg2+ analysis. The combination of these two approaches results in an efficient, reliable, and fast electrochemical detection technique for on-site trace analysis of Hg2+ that is in concentrations lower than that required by WHO for drinking water. Image 1 • The batch preparation of a novel gold micro-nanostructured electrode. • The significantly improved sensitivity and reproducibility with the addition of small amount of Br−. • The effective removal of organic residues in ambient water by simple electrochemical oxidation pretreatment. [ABSTRACT FROM AUTHOR]

The electrochemical properties of supercapacitors based on carbide-derived carbon electrodes doped with up to 5 wt% mixture of halide or alkali ion salts in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (EMImTFSI) have been studied to exploit their specific energy storage mechanism. To separately highlight the effect of redox active mixture doped electrodes, neat EMImTFSI is applied as the electrolyte for all studied supercapacitor systems. A noticeable increase of capacitance for carbon electrodes doped with halide ions has been observed, as measured by three different electrochemical analysis techniques. Compared with neat EMImTFSI based system, carbon electrodes doped with alkali ion salt mixtures do not show a noticeable improvement of energy storage characteristics. Interestingly, both 5 wt% alkali and halide ion salt mixture doped system exhibit a stable high capacitance up to 124 F/g at 3 V. It is shown that this enhancement of capacitance is due to reversible faradaic processes and the specific adsorption of halide ions within the micro- and mesoporous electrode material and does not limit the bulk electrolyte properties. It is seen that the alkali and halide ion doped systems display greater electrochemical stability compared with neat EMImTFSI based system within constant voltage floating tests. Image 10142 • Electrochemical characteristics of hybrid-supercapacitors based on carbon electrodes. • Small amount of halide and alkali ion doping for microporous carbon electrodes. • Increased capacitance due to redox activity and specific adsorption of halide ions. • Reproducible capacitance values obtained from three measurement techniques. [ABSTRACT FROM AUTHOR]

The specific removal of bilirubin is essential to cure hyperbilirubinemia. In this study, cellulose membranes were prepared by a phase inversion technique with surface functionalized Procion Blue H-5R (PB) for bilirubin adsorption. The chemical structures and morphologies of membranes were characterized by FITR, XPS and SEM. The immobilized PB amounts of membranes were investigated. Moreover the effects of immobilized PB amounts, initial concentration of bilirubin, NaCl concentration, pH value, recycle numbers and BSA concentration on adsorption capability of PB-immobilized cellulose membrane to bilirubin. Results showed that PB was immobilized onto the cellulose membrane surfaces and reached a maximum amount of 230 mg/g membrane. The bilirubin adsorption isotherm fitted Langmuir model well. Furthermore, the PB-immobilized membrane could specifically adsorb bilirubin in BSA/bilirubin mixed solution and bilirubin adsorption capacity reached 26 mg/g at pH 9.5. The membrane showed excellent reusability that the adsorption capability of bilirubin decreased 1.3% after 3 adsorption–desorption cycles. This work indicated that the Procion Blue H-5R can be expected as a ligand for specific removal of bilirubin. [ABSTRACT FROM AUTHOR]

The reusability of spent adsorbents is the most important characteristic for their practical application. The process of MgFe2O4 regeneration after methylene blue (MB) adsorption was studied. The effect of the nature (HCl, HNO3, and MgCl2) and the concentration (10-3-10-1 M) of regeneration agents was established. All the regeneration agents at 10-3 and 10-2 M had high efficiency and adsorption capacity recovery reached 80-90%, whereas for 10-1 M concentration the adsorption efficiency was in the range of 4.5-36.2%. It was shown that the concentration of desorbed MB was much less than what had been previously adsorbed and did not correlate with regeneration efficiency. The unusual behavior of MgFe2O4 during regeneration could be due to different mechanisms of regeneration by OH3 þ and Mg2+ ions: (i) for acidic regeneration the main process was the non-specific adsorption of OH3 þ ions in a diffusion layer and the substitution of adsorbed MB due to electrostatic forces; (ii) in the case of Mg2+ as a regeneration agent, there was specific adsorption due to the completion of a crystal lattice of MgFe2O4 nanoparticles by Mg2+ ions (according to the rules of Fayans-Pannet) with the formation of new Mg-OH adsorption sites and the super-equivalent adsorption of Mg2+ ions (according to DLVO (Derjaguin, Landau, Verwey, and Overbeek) theory) accompanied by a recharge of the MgFe2O4 surface. These phenomena of MgFe2O4 regeneration using Mg2+ ions must be taken into account in the theory and practice of adsorption. [ABSTRACT FROM AUTHOR]

In this work, a novel thermosensitive surface protein imprinted polymer monolithic column (TsIPMC) was synthesized by combining high internal phase emulsion with 1,1-diphenylethene (DPE) controlled polymerization. Innovatively, DPE and acrylic acid (AA) monomers were introduced in high internal oil and water phases respectively. The research showed that DPE could not only initiate the polymerization of monomers, but also improve the pore performance of monolithic columns. The elution efficiency of template or target protein could be significantly improved by the thermoresponse characteristics of TsIPMC. The effects of DPE and AA on adsorption capacity and imprinting factor (IF) were studied. The optimization results presented that the optimal addition amounts were 55 mg and 50 mg. Under such conditions, the IF of as-prepared TsIPMC was 1.61 and the saturated adsorption capacity was 66 mg/mL. The influences of the flow rate and target protein concentration on the adsorption equilibrium time and effluent volume were revealed. TsIPMC showed higher selectivity for different competing proteins. The reuse stability result showed that the adsorption of TsIPMC to BSA decreased by 3.69% after 12 times of reuse, and the IF remained basically unchanged. TsIPMC would demonstrate the potential applications in the field of protein purification and separation. fx1 • A novel surface protein imprinted polymer monolithic column (TsIPMC) is synthesized. • The TsIPMC is synthesized by high internal phase emulsion and controlled polymerization. • Two-stage pores cause excellent mass transfer performance and high adsorption capacity. • The TsIPMC exhibits high selectivity, simple operation, and strong stability. • TsIPMC will provide efficient material and easily method for biomass separation. [ABSTRACT FROM AUTHOR]

The potential dependence of the contact angle between a gold electrode and lithium, sodium, potassium, rubidium, and caesium chloride melts was studied using the meniscus weight method to establish the patterns of wettability of solid surfaces by ionic melts when changing the composition of the salt phase and the jump of the electric potential. It is found that the forms of the contact angle versus the potential curve of Au change from a convex to a camel-like shape with two maxima upon replacing the lithium chloride with the caesium chloride melt. This phenomenon is explained by the assumption that the adsorption of the halide anions at the positively charged electrode surface has a chemical rather than electrostatic character. The adsorption process is accompanied by a charge transfer through the interface and the formation of covalent bonds between the adsorbent and adsorbate. [ABSTRACT FROM AUTHOR]

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The development of high-performance protein-imprinted materials remains challenging due to defects concerning high mass transfer resistance and non-specific binding, which are crucial for protein purification and enrichment. In this paper, lysozyme-imprinted mesoporous Zr-based MOF (mesoUiO-66-NH 2 @MIPs) with specific and selective recognition of lysozyme (Lyz) were prepared by surface imprinting technology. In particular, the excellent hydrophilicity mesoporous MOFs (mesoUiO-66-NH 2) with a pore size of 10 nm was prepared as a carrier for Lyz immobilization by an auxiliary modulation strategy to regulate the microporous structure of UiO-66-NH 2 with the propionic acid solution, enabling massive loading of the macromolecular protein Lyz. The mesoUiO-66-NH 2 @MIPs reached a maximum saturation adsorption of 206.54 mg g−1 on Lyz in 20 min at 25 °C with an imprinting factor of 2.57 and selection factors of 2.02, 2.34, and 2.45 for cytochrome c (Cyt c), bovine serum albumin (BSA) and bovine hemoglobin (BHb), respectively. More importantly, the mesoUiO-66-NH 2 @MIPs could specifically recognize Lyz from the mixed protein system. The adsorption capacity of Lyz could still reach 78.55% after 5 cycles with good cyclic regeneration performance. This provides a new research option for developing and applying novel porous MOF in biomolecule imprinting technology and the specific separation of biomolecules. [Display omitted] • The excellent hydrophilicity mesoUiO-66-NH 2 with a pore size of 10 nm was first developed. • The MIP crosslinker [AVIM]Cl provides multiple interactions, thus improving the specific recognition properties of the MIP. • MesoUiO-66-NH 2 @MIPs possessed remarkable specific and selective recognition of lysozyme. [ABSTRACT FROM AUTHOR]

[Display omitted] • A first-principle study aiming to unravel the electric double layer (EDL) structure at the interface between gallium-based liquid metal (GBLM) electrode and aqueous electrolyte. • Gallate anions which are spontaneously bound with GBLM, build up the inner Helmholtz layer, attracting a diffusion layer with opposite charges. • Such specific adsorption induced double layer structure can result in a significant interface potential change ∼ 1 V. • The excess negative charge on GBLM surface interferes with the adsorbed gallates and amplifies the interface potential change across EDL. • This work contributes to deep understandings of the electrochemical processes inside EDL. Gallium-based liquid metal (GBLM) has been identified as a promising electrode material in flexible aqueous batteries, which are widely employed in wearable electronic devices. The electrode–electrolyte interface has significant effects on battery performance, but its molecular-level structure remains elusive. This work, for the first time, attempts to unravel electric double layer (EDL) at the interface between GBLM electrode and aqueous electrolyte through density functional theory (DFT) calculation and ab initio molecular dynamic (AIMD) simulation. It is found that such EDL structure origins from the specific adsorption of gallates (e.g. Ga(OH) 4 − and H 2 GaO 3 −) on GBLM (e.g. eutectic gallium-indium alloy), and these gallates build up the inner Helmholtz layer (IHL), attracting a diffusion layer with opposite charges. Further, the adsorption properties of gallates and the capacitive behavior of EDL are analyzed, in which the charging of GBLM electrode is systematically considered. The results manifest that the excess negative charge on GBLM surface interferes with the adsorbed gallates and amplifies the interface potential change across EDL. The proposed EDL structure contributes to deep understandings of the electrochemical processes occurring at electrode–electrolyte interface in GBLM aqueous batteries. [ABSTRACT FROM AUTHOR]

• Specific adsorption of cinnamycin on DOPE-included-biomimetic membranes. • Coverage fraction converted from the ratio of binding to saturated response. • Kinetic and thermodynamic estimation based on the coverage fraction. • Rate constant of the adsorption at 6∼7 × 10−3 s-1. • Equilibrium constant of the adsorption between 1 × 107 and 5 × 107 M−1. The binding of the cinnamycin on the biomimetic membrane was studied with respect to time using the surface plasmon resonance(SPR). The membrane was composed of the inner layer tethered on the gold surface and the outer layer formed on the inner layer, which was at the desired ratio of dioleoylphosphatidylethanolamine(DOPE) to dioleoylphosphatidyl- choline(DOPC). On the bilayer, the cinnamycin solution was injected and showed different behavior of the binding with respect to time up on its concentration. For kinetic analysis, the behavior was converted to the coverage fraction with respect to time, which was ratio to the saturated response of 5 μM cinnamycin solution. The fraction change with respect to time was function of the available-site, which was eventually the subtraction of the fraction from one. With the fitting of the first order of the available site, the rate constant was acquired into 6∼7 × 10−3 s-1. Furthermore, the reciprocals of the fraction and the concentration were fitted with the Langmuir adsorption isotherm. From the fitting, the equilibrium constant was between 1 × 107 and 5 × 107 M-1. [ABSTRACT FROM AUTHOR]