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The classical Ullmann CS cross coupling reaction of aryl iodides with aromatic/alkyl thiols under catalysis of 15 mol% Cu(OAc)2·H2O and 15 mol% 2,2′-biimidazole works at 80°C in DMSO for 3 h to provide a variety of aryl sulfides in good to excellent yields. [ABSTRACT FROM AUTHOR]

It is of great significance in exploring alternative catalysts to platinum (Pt)-based materials for oxygen reduction reaction (ORR), because this reaction is invariably involved in various fuel cells and metal-air batteries. We herein reported the nitrogen doped graphene nanosheets (NGNSs) with pore volume of as high as 3.42 m/g and investigated their potential application as ORR catalysts, it was demonstrated the NGNSs featured high activity, improved kinetics and excellent long-term stability for ORR. The NGNSs were successfully used as cathode catalysts of microbial fuel cells (MFCs) and performed even better than the commercial Pt/C (Pt 10%) catalysts at the maximum power output. [ABSTRACT FROM AUTHOR]

Nanocrystalline Tb3+-doped La2O3 phosphors were prepared through a Pechini-type sol-gel process. X-ray diffraction (XRD), field-emission-scanning electron microscopy (FESEM), photoluminescence, cathodoluminescence (CL) spectra, and lifetimes were utilized to characterize the synthesized phosphors. The XRD results revealed that a pure La203 phase can be obtained at 700°C. FESEM images indicated that the La2O3:Th3 phosphors are composed of aggregated spherical particles with sizes ranging from 60 to 100 nm. Under the excitation of UV light and low voltage electron beams (0.5-3 kV), the La2O3:Tb3 phosphors showed the characteristic emissions of Th3 (5D34-7F6543 transitions). The CL colors of La203:Th3F phosphors was tuned from blue to green by changing the doping concentration of Th3 to some extent. The optimum blue CL of La2O3:Th3 phosphors had. better Commission International l'Eclairage (CIE) coordinates and higher emission intensity than those of the commercial product Y2SiO5:Ce3+ (blue, product no. 1047, Nichia Kagaku Kogyo Kabushiki, Japan). [ABSTRACT FROM AUTHOR]

Abstract: A novel blue-emitting molecular material derived from calix[4]arene and pyrazoline was designed and synthesized. Its photophysical properties were investigated in CHCl3 solution and solid film by UV–vis and photoluminescent (PL) spectra. The maximum peaks are almost at the same positions both in UV–vis and PL spectra indicated that the grafted pyrazoline on calix[4]arene by chemical bond can help to disperse emitting pyrazoline chromophores in host material of calix[4]arene and tend to reduce the interaction of each pyrazoline molecule. Light-emitting diodes (LEDs) using this material as active layer were fabricated by a wet process. The turn-on voltage of the typical LED based on calix[4]arene-pyrazoline was about 6.6V, and the maximum EL efficiency of the device was determined to be 1.52%. The homogeneous film based the resulting material was obtained even after keeping for three months. The primary results indicate that this novel material is a promising candidate as pure blue and stable light-emitting material for display. [Copyright &y& Elsevier]

[Display omitted] • Rare-earth Tb doped Pd 49 Ag 30 Te 4 alloy facilitates selective exposure of (1 1 1) crystal plane. • The doping of Tb accelerates electron transfer, promotes CO 2 adsorption as well as activation, and suppress H 2 evolution. • The introduction of Tb regulates d-band center of Pd 49 Ag 30 Te 4 , weakens the Pd − C bonding ability, and promotes the production of CO. Employing electric energy to convert carbon dioxide (CO 2) into valuable small molecules is a potentially practical method in energy storage and greenhouse gas alleviation. A huge challenge for electrocatalytic CO 2 reduction is to reduce overpotential to improve energy efficiency. Herein, we demonstrate that doping alloy Pd 49 Ag 30 Te 4 (PAT) with rare-earth element Tb is beneficial for selective exposure of (1 1 1) crystal plane, which is a highly active crystal plane for producing carbon monoxide (CO). The as-prepared Tb 2.9 PAT exhibited high electrocatalytic performance with 95.7 % CO faradic efficiency at − 0.8 V (vs RHE), far exceeding that of PAT, and coupled with good durability. In situ spectral study and theoretical calculations disclose that the introduction of Tb regulates the d-band center of PAT alloy, weakens the Pd − C bonding ability, and promotes the desorption of *CO in the rate-determining step. This study provides a method for doping induced selective exposure of crystal face, which provides new idea for improving catalytic performance. [ABSTRACT FROM AUTHOR]

[Display omitted] • Preparation of interconnected hollow carbon spheres functionalized with B and Tb single atoms. • B doping increases the Lewis acidity of Tb, promoting the occurrence of rate-determining step of ring-opening reaction. • The prepared TbN 4 B 2 /C can adsorb full band light to achieve efficient photothermal conversion. • The CO 2 cycloaddition reaction with using TbN 4 B 2 /C as catalyst is a photothermal synergistic catalytic mechanism. Nowadays, it is becoming increasingly urgent to lower the escalating carbon dioxide (CO 2) to reduce greenhouse effect. Fortunately, it is an ideal strategy by using the inexhaustible solar energy as the driving force to manipulate the cycloaddition reaction, the atomic efficiency of which is 100 %. This work represents the first attempt on utilization of rare-earth metal Tb with atomic dispersion, and the structure of Tb coordinated with 4 N -atoms and 2B-atoms was constructed on interconnected carbon hollow spheres. The introduction of electron-deficient B reduces the electron density of Tb, thereby boosting Lewis acidity and promoting the occurrence of ring-opening reaction. The mechanism exploration enunciates that TbN 4 B 2 /C is a photothermal synergistic catalyst, the combined action of photogenerated electrons and strong Lewis acidic site of Tb reduces the free energy of the rate-determining step, and then improving the yield of cyclic carbonate up to 739 mmol g-1h−1. [ABSTRACT FROM AUTHOR]

[Display omitted] • Hollow Ni(OH) 2 was used as the precursor to form the layered flower sphere structure. • A built-in electric field was formed between the interface of CdS and NiS. • A S-scheme charge transfer mode was established by the driver of the electric field. • CdS/NiS exhibits high H 2 evolution rate of 39.68 mmolg−1 h−1. Photocatalytic H 2 evolution is of prime importance in the energy crisis and in lessening environmental pollution. Adopting a single semiconductor as a photocatalyst remains a formidable challenge. However, the construction of an S-scheme heterojunction is a promising method for efficient water splitting. In this work, CdS nanoparticles were loaded onto NiS nanosheets to form CdS/NiS nanocomposites using hollow Ni(OH) 2 as a precursor. The differences in the Fermi energy levels between the two components of CdS and NiS resulted in the formation of a built-in electric field in the nanocomposite. Density functional theory (DFT) calculations reveal that the S-scheme charge transfer driven by the built-in electric field can accelerate the effective separation of photogenerated carriers, which is conducive to efficient photocatalytic hydrogen evolution. The hydrogen evolution rate of the optimized photocatalyst is 39.68 mmol·g−1 h−1, which is 6.69 times that of CdS under visible light. This work provides a novel strategy to construct effective photocatalysts to relieve the environmental and energy crisis. [ABSTRACT FROM AUTHOR]

[Display omitted] • The close contact between Co and CoP at the interface results in the formation of space-charge region. • The existence of space-charge region promotes the rapid transfer of electrons from Co to CoP. • Co active sites with increased electron density enhance the adsorption and activation ability of CO 2. • The high-speed reduction of CO 2 was realized by reducing the activation energy barriers. Photocatalytic CO 2 reduction has been regarded as an ideal method to simulate photosynthesis for achieving carbon neutralization. However, poor charge transfer efficiency limits its development. Herein, an efficient Co/CoP@C catalyst was prepared with compact contact of Co and CoP layer by using MOF as precursor. At the interface of Co/CoP, the difference in functionality between the two phases may result in uneven distribution of electrons, thus forming a self-driven space-chare region. In this region, spontaneous electron transfer is guaranteed, thus facilitating the effective separation of photogenerated carriers as well as boosting the utilization of solar energy. Furthermore, the electron density of active site Co in CoP is increased and more active sites are exposed, which promotes the adsorption and activation of CO 2 molecules. Together with suitable redox potential, low energy barrier for *COOH formation and easy desorption of CO, the reduction rate of CO 2 catalyzed by Co/CoP@C is 4 times higher than that of CoP@C. [ABSTRACT FROM AUTHOR]

The D band to G band intensity ratio in the Raman spectroscopy has been widely used to identify the degree of covalent functionalizations of single-walled carbon nanotubes (SWCNTs). The Raman D band at ∼1350 cm −1 is extremely sensitive to the sidewall sp 3 scattering centers created by covalent functionalizations. However, we report here that [2 + 1] cycloaddition functionalization does not efficiently excite the Raman D band even up to ∼ 3% of the functionalization as manifested by X-ray photoelectron spectroscopy (XPS). In-depth Raman spectra and XPS spectra analysis suggest that such low excitation of the Raman D band originates from the weakened electron scattering in [2 + 1] cycloaddition functionalized SWCNTs due to their unique sidewall bonding configurations. Our results reveal the origin of the low excitation of the Raman D band in [2 + 1] cycloaddition functionalized SWCNTs, and provide a precise and in-depth understanding of [2 + 1] cycloaddition functionalized SWCNTs. [ABSTRACT FROM AUTHOR]

A high-performance chemiluminescence immunoassay (CLIA) has been established for the determination of insulin-like growth factor I (IGF-I) in human serum. This approach is dependent on a double antibody sandwich-complexation method to determine the concentration of IGF-I in serum. The results demonstrate that this method was able to determine IGF-I across a wide linear range from 5 to 1000 ng/mL. The limit of the blank was 0.022 ng/mL. The coefficient of variation (CV) was less than 7% for both intra-assay and inter-assay precision. The average recoveries were 109.4%, 98.8%, and 101.9%. This method offers excellent performance and provides a foundation for further clinical applications of serum IGF-I determination. [ABSTRACT FROM AUTHOR]

Designing a membrane electrode with high activity and anti-scaling ability in a wide pH range is crucial to the development of flow-through electro-Fenton system. Herein, we reported a novel porous membrane composed of ultrafine FeMn bimetallic nanoparticles anchored in nitrogen-doped carbon nanofibers (FeMn/N-CNF) obtained through a facile electrospinning-carbonization process. The strong metal-support interaction (SMSI) phenomena including carbon encapsulation structure and electron transfer from metal to N-CNF, beneficial to the intrinsic activities, were successfully induced by the enhanced interfacial metal-nitrogen bonding in FeMn/N-CNF. Microstructural characterizations and leaching test revealed that the SMSI encapsulation structure could promote the formation of ultrafine FeMn nanoparticles in N-CNF during the high-temperature carbonization process and prevent leaching of active Fe/Mn metals into solution across a wide pH range. The constructed gravity-driven flow-through electro-Fenton system based on a FeMn/N-CNF cathode membrane exhibited superior performance to generate H 2 O 2 (36.23 mmol L−1 h−1) and subsequent activate H 2 O 2 decomposition to hydroxyl radicals (0.1024 min−1), achieving remarkable degradation efficiencies of 96.8%, 92.3%, and 90.3% within 60 min for Rhodamine B, Tetracycline, and Methyl Orange, respectively. Furthermore, the FeMn/N-CNF membrane filter demonstrated good pH adaptability, excellent cycle stability and anti-scaling ability during the degradation process. This work offers a viable avenue to enhance degradation performance and environmental robustness for practical water decontamination via achieving SMSI effect in carbon-supported electro-Fenton membranes. [Display omitted] • Ultrafine nanoparticles anchored in N-CNF porous membrane is simply prepared. • Strong metal-support interaction (SMSI) is existed in FeMn/N-CNF. • Gravity-driven flow-through electro-Fenton FeMn/N-CNF system is constructed. • Such system achieves efficiently degradation for various pollutants in wide pH range. • FeMn/N-CNF filter exhibits excellent anti-scaling ability and mechanical stability. [ABSTRACT FROM AUTHOR]

[Display omitted] • TAPD-COFs exhibit a high level of affinity for I 2. • TAPD-COFs are largely unaffected by irradiation. • Three novel COFs were successfully synthesized using triphenylamine as the main chain. • The rate of adsorption for TAPD-PDB was significantly higher than that of other COFs. The construction of ideal adsorbents for the capture of radioiodine usually requires high adsorption capacity and high adsorption rate. However, this is still a challenging problem. The advantages of COFs based on their good crystallinity, pore order, and structural diversity make COFs ideal adsorbents. Here, we developed three novel electron-rich COFs based on the triphenylamine, which have good chemical, thermal, and radiation-resistant stability and are suitable for the harsh environment of radioactive iodine therapy. Upon the introduction of heteroatom N/S, TAPD-PDB and TAPD-TDB exhibited amazing adsorption capacities (75 °C: 7.88 g g−1 and 6.98 g g−1, 25 °C: 4.46 g g−1 and 3.62 g g−1), while the adsorption rates, K 80% , are significantly increased to 5.34 g g−1h−1 and 4.22 g g−1h−1, which is higher than most of the reported iodine adsorbents. It was surprising that COFs also have excellent adsorption properties for iodine in cyclohexane solution up to 1260 mg L−1. FT-IR, XPS, Raman and electrostatic potential calculations indicate that the ultrafast and ultrahigh iodine uptake of COFs can be attributed to the interplay of their rich electronic structure, efficient adsorption sites, helical conformation and charge transfer. This study shows the efficient and ultrafast removal of iodine from nuclear wastewater and nuclear exhaust gas by electron-rich COFs. [ABSTRACT FROM AUTHOR]

[Display omitted] • A novel biocatalyst BFMO@BC was successfully synthesized. • 1O 2 was evidenced as the dominant reactive oxidizing species. • BFMO@BC was environmentally adaptable and exhibited excellent cycling properties. • The bimetallic cycle, C=O groups, and carbon defects were responsible for the superior catalytic activity. Biogenic metal oxides are considered superior eco-friendly candidates for peroxymonosulfate (PMS) activation. However, they often suffer from metal aggregation, high ion leaching, and poor recyclability, diminishing their practical attractiveness. In this study a novel biochar-loaded biogenic iron-manganese oxide composite (BFMO@BC) was synthesized to activate PMS for sulfamethoxazole (SMX) degradation. The introduction of biochar brought more active sites (C=O and carbon degree), promoted the bimetallic redox cycle between Fe and Mn, and facilitated the conversion of SO 5 •− to 1O 2 , which significantly improved the catalytic performance. Results demonstrated 100 % SMX degradation within 3 min in BFMO@BC/PMS system. And the reaction rate constant of this system was as high as 0.852 min−1, which was 11.6 times than that of BFMO/PMS. Moreover, high SMX removal efficiencies (near 100 %) could be obtained over a wide pH range (3–11) and in complex water matrices. BFMO@BC displayed excellent adaptability, stability, and reusability for SMX removal. This study provides new insights into the utilization of biocatalysts in advanced oxidation processes for pollutant degradation. [ABSTRACT FROM AUTHOR]

An air purifier that provides clean air will be popular if it is portable and capable of removing volatile organic chemicals and reducing exposure to bacteria. Herein, ultra-thin and dense Bi 2 WO 6 nanoflakes grown on W meshes specialize in offering abundant oxygen vacancies due to Na+ driving laminar splitting. Under visible lights, the photogenerated carriers streaming along the ultrathin Bi 2 WO 6 surface produce bountiful reactive oxygen species for mineralizing VOCs and sweeping bacteria. Enriched with •O 2 - and •OH, a 15 cm*5 cm Na-Bi 2 WO 6 mesh can completely degrade 30 ppm toluene in 0.45 dm3 reactor in 1 hour without producing any toxic intermediates like benzene, and its efficacy only decayed by 4% after a continuous 14-hour run. A cup-shaped air purifier was assembled with the Na-Bi 2 WO 6 mesh, enabling the rapid elimination of 1 ppm toluene, 2 ppm formaldehyde, and bacteria within a 120 dm3 test space. [Display omitted] • Na+ drives laminar splitting of Bi 2 WO 6 nanosheets, producing abundant oxygen vacancies. • Na+ enables the contact angle of water on Bi 2 WO 6 decrease from 85.73 ° to 26.55 °. • Highly hydrophilic Na-Bi 2 WO 6 facilitates the generation of hydroxyl radicals. • Under irradiation, Na-Bi 2 WO 6 can efficiently degrade toluene and sterilize bacteria. • The integrity of Na-Bi 2 WO 6 makes it feasible in assembling air purifiers. [ABSTRACT FROM AUTHOR]

[Display omitted] Rational construction of heterogeneous interfaces that maximize carrier flux and allow carrier separation for achieving efficient photocatalytic CO 2 reduction still remain a challenge. In this work, high-throughput and intimate interfaces that allow efficient carrier separation and flux are designed by depositing high-density CeO 2 nanoparticles on large-area Ti 3 C 2 T X (T = terminal group) nanosheets. Oxygen-containing functional groups of Ti 3 C 2 T X nanosheets facilitate the anchoring of CeO 2 nanoparticles on the nanosheets via the formation of interfacial Ce-O-Ti bonds, which serve as effective channels for reverse and synergistic migration of electrons and holes to achieve spatial separation. The light absorption of the CeO 2 @Ti 3 C 2 T X composites is extended to the infrared (IR) region due to narrow bandgaps of Ti 3 C 2 T X. High-density lateral and basal interfaces enhance carrier migration, which ultimately aids the CeO 2 @Ti 3 C 2 T X composites to exhibit excellent activity for reducing CO 2 to alcohols (i.e., methanol and ethanol) under both visible (vis) and IR irradiations. The total amount of produced alcohol under visible irradiation is 109.9 μmol•gcatal−1 (methanol and ethanol: 76.2 and 33.7 μmol•gcatal−1, respectively), which is 4.3 times higher than that obtained using CeO 2 (methanol and ethanol: 19.8 and 6 μmol•gcatal−1, respectively). The yields of methanol and ethanol using the optimized CeO 2 @Ti 3 C 2 T X were 102.24 and 59.21 μmol•gcatal−1, respectively, after 4 h under the vis-IR irradiation. [ABSTRACT FROM AUTHOR]

[Display omitted] • DHTH-FTD has an ultra-high adsorption capacity of 714.1 mg‧g−1 for Pd(II). • Covalent organic frameworks are stable and durable. • DHTH-FTD shows excellent Pd(II) selectivity, a removal rate of 99.6% is achieved even with 17 coexisting competing ions. • The exceptional absorption of DHTH-FTD is attributed to the chelation between O and N atoms and Pd(II). Palladium is a rare resource and is found in extremely low concentration in the earth's crust. Therefore, the efficient recovery of palladium from wastewater is significant but remains challenging. Herein, two acyl hydrazone-functionalized covalent organic frameworks (DMTH-FTD and DHTH-FTD) were synthesized and their adsorption properties for Pd(II) in water were investigated. The DHTH-FTD has an exceptional adsorption capacity of 714.1 mg‧g−1 for Pd(II) at pH 1.0, which is the highest value among all the crystalline porous adsorbents that have been reported so far. At a concentration of 50 mg‧L−1, 96.3 % of Pd(II) can be removed in a short period of time, which still maintains up to 92.2 % after five cycles. Both DMTH-FTD and DHTH-FTD both demonstrate excellent Pd(II) selectivity, with removal rates of 93.4 % and 99.6 % of Pd(II) from 17 coexisting competing ions. The FT-IR spectroscopy, point zero charge (PZC), XPS and DFT calculations reveal that the mechanisms behind the efficient adsorption of Pd(II) by DHTH-FTD is attributed to the chelation between O and N atoms and Pd(II). This work not only provides a new research idea for the efficient adsorption and recovery of Pd(II), but also contributes to the development of covalent organic materials. [ABSTRACT FROM AUTHOR]

Limited by the sluggish oxygen mobility, perovskite catalysts are still unsatisfactory in real application. Herein, an effective strategy concerning the activation of surface lattice oxygen in LaCoO 3 via fluorine incorporation was proposed to improve its toluene oxidation performance. The constructed LCO-2 F reveals more outstanding catalytic activity than that of bare LCO, and excellent long-term run along with water-resistance. Concretely, the F incorporation results in the reduced electronic density around surface lattice oxygen together with the weakened Co–O bond strength, and thus the enhanced surface lattice oxygen activity. Moreover, the F incorporation promotes the exposure of more electron-deficient Co3+ species accompanying with abundant surface lattice oxygen as well, which contribute to the adsorption and activation of toluene. In situ DRIFTS results indicate that LCO-2 F also possesses superior O 2 replenishing capacity for fast degradation regarding the tough intermediate species of benzoate, and thus speeding the catalytic cycle. [Display omitted] • LaCoO 3 with enhanced lattice oxygen activity and adsorption ability was achieved via F doping. • F doping results in reduced electronic density around oxygen site and weakened Co–O bond strength. • F incorporation promotes the exposure of more electron-deficient Co3+ species. • LCO-2 F has superior O 2 replenishing capacity for fast degradation of intermediate species. • LCO-2 F reveals outstanding activity, stability and water-resistance for toluene oxidation. [ABSTRACT FROM AUTHOR]

The stability of industrial catalysts for dry reforming of methane (DRM) reaction is still an urgent challenge. The multifunctional nanocatalyst of SSZ-13 supported Ni/CeO x bimetallic catalysts was successfully fabricated by the impregnation method. The Ni/CeO x species was dispersed highly in the microporous structure of SSZ-13, and the Ni active sites can activate the C-H bond dissociation of CH 4 , while the oxygen vacancy could promote the adsorption and activation of CO 2. The NiCeO x /SSZ-13 catalyst showed excellent catalytic performance for dry reforming of methane, i.e., its conversion of CH 4 and CO 2 were 91 and 94%, and the ratio of H 2 /CO was about 0.88 at 750 °C after 50 h. Based on the results of CH 4 &CO 2 -TPSR and NH 3 -TPD, the synergy effect of NiCeO x species can promote the adsorption and activation of CH 4 and CO 2 , and the coke on the surface during DRM is readily converted to CO by reacting with the surface oxygen from CeO x species, which effectively boost the elimination of carbon deposits. It highlights a new strategy for the fabrication of high-efficient zeolite catalysts for DRM to enhance the utilization of CH 4 and CO 2. [Display omitted] • The multifunctional nanocatalyst of SSZ-13 supported Ni/CeO x bimetallic catalysts was successfully fabricated. • The NiCeO x /SSZ-13 catalyst showed excellent catalytic performance for dry reforming of methane. • The synergy effect of NiCeO x species can promote the adsorption and activation of CH 4 and CO 2. • A new strategy for the fabrication of high-efficient zeolite catalysts for DRM to enhance the utilization of CH 4 and CO 2. [ABSTRACT FROM AUTHOR]

Cullin 4B (CUL4B) is a member of the Cullin RING E3 ligase family, which is found to be overexpressed in multiple cancers, thus facilitating tumorigenesis and progression. However, the correlation between CUL4B and p53 in colorectal cancer cells (CRC) remains to be further elucidated. In this study, we newly identified that CUL4B functions as a negative regulator of p53, thereby facilitating CRC tumorigenesis and progression. Our data has demonstrated that CUL4B was frequently overexpressed in CRC tissues, and its upregulation was closely correlated with disease progression and poor prognosis. Moreover, CUL4B knockdown suppressed cell proliferation, invasion and epithelial-mesenchymal transition (EMT) of CRC cells. Mechanistically, CUL4B depletion increased the expression of p53 protein and its downstream targets p21, PUMA and MDM2. Furthermore, CUL4B depletion prolonged the half-life of p53 protein, and CUL4B is a binding partner of MDM2. In conclusion, our study shed new lights on the complex regulatory network between CUL4B and p53, and clarifies this CUL4B-p53 axis contributes greatly to CRC tumorigenesis and progression. [ABSTRACT FROM AUTHOR]

[Display omitted] • Three novel POP was constructed by polymerizing reaction. • The POP presented a high adsorption capacity of 3.96 g g ads −1 for iodine vapor. • The N, O, and P heteroatoms promoted the high-efficient iodine removal. Nuclear energy is a sustainable, low-carbon footprint, and cost-effective future energy source that might play an important role in the foreseeable energy demand. However, due to the volatility and long half-life of the released waste radioiodine from nuclear power stations, appropriate handling of radioactive waste is still a great challenge. Using covalent organic polymers (COPs) adsorbents to capture radioactive iodine compounds has gained much attention due to the simplicity of operation, low maintenance costs, and resistance to highly corrosive solutions. Herein, three as-synthesized amine-linked COP materials with heteroatoms (N, P, and O) are employed for iodine capture and obtain excellent iodine capture capacity due to the strong interactions of abundant heteroatoms with iodine compounds. The gas-phase iodine adsorption capacity of as-prepared COPs reached > 2.1 g g ads −1 in 1 h, with an optimal gas-phase iodine adsorption capacity of 3.96 g g ads −1 and a liquid-phase iodine adsorption capacity of 905.69 mg g ads −1. This study showed the promising iodine removal capabilities of heteroatoms-containing COPs from nuclear wastewater and nuclear exhaust gases. [ABSTRACT FROM AUTHOR]

[Display omitted] • Single-atom Fe catalysts with different coordination numbers were simply prepared. • Fe-N 3 /C/PMS system exhibits excellent degradation performance of TC. • The coordination numbers of single-atom Fe regulates the activation pathway of PMS. • The free radical/non-free radical co-oxidation has high reactivity and stability. • Electron transfer mechanisms between Fe-N x /C and PMS are proposed. In the reaction systems involving peroxymonosulfate (PMS) activation, the degradation of organic pollutants is influenced by the distinct roles played by the oxidation of free radicals and non-free radicals. The synergistic effect resulting from both oxidation pathways is often more efficient compared to a single oxidation pathway, as it allows for the optimal utilization of oxidation capacity and adaptation to complex reaction environments. Nitrogen-doped carbon substrates hosting single-atom catalysts (SACs) are anticipated to serve as an optimal platform for managing the dual oxidation pathways in the PMS activation reaction. This is attributed to the availability of numerous reaction sites that meet the activation requirements. However, there's a lack of substantial reports on this subject. Herein, we synthesized a series of single-atoms Fe nitrogen-doped carbon catalysts with different coordination structures by adjusting the coordination numbers between Fe and N atoms. It is used to investigate the reaction pattern of PMS over SACs, so as to enhance the catalytic efficacy of SACs through distinct coordination structures. The experimental and theoretical results indicate that PMS functions as both an electron receiver and provider on FeN x /C catalysts. Moreover, the specific arrangement of the Fe-N-C structure influences the exchange of electrons between the catalysts and PMS. Hence, the co-oxidation pathway of free radicals (OH, SO 4 − and O 2 −) and non-free radicals (1O 2) can be modulated by altering the coordination number of Fe and N atoms during PMS activation. The elimination efficiency of tetracycline hydrochloride was significantly enhanced due to the abundance of both free radical and non-free radical species generated in the FeN 3 /C/PMS reaction system, exhibiting a degradation kinetic constant of 0.564 min−1. In addition, it showed promising potential for application in practical wastewater degradation, exhibiting high anti-interference to general environmental disturbances (such as humic acid, chloride ions, bicarbonate ions and nitrate ions). [ABSTRACT FROM AUTHOR]

[Display omitted] • Bi-bridge BiPO 4 /CdS heterojunction (BiPO 4 /Bi/CdS) with oxygen vacancy was fabricated. • BiPO 4 /Bi/CdS displayed high intersystem crossing efficiency. • The effective intersystem crossing from singlet to triplet excitons facilitated 1O 2 production. • BiPO 4 /Bi/CdS exhibits excellent photocatalytic activity in ofloxacin degradation. • Mechanism of type-II heterojunction based on exciton energy transfer was first set forth. The separation of photogenerated charge carriers has been widely investigated, but exciton effects in type-II heterojunctions are often overlooked. Herein, the Bi-bridge BiPO 4 /CdS type-II heterojunction (BiPO 4 /Bi/CdS) with oxygen vacancy was successfully fabricated. BiPO 4 /Bi/CdS displayed stronger phosphorescence emission than BiPO 4 /Bi, suggesting the higher efficiency of intersystem crossing. The effective intersystem crossing from singlet to triplet excitons facilitated the activation of O 2 to singlet oxygen (1O 2), which was the product of energy transfer from the triplet excitons to the ground-state O 2 molecule. The synergies between oxygen vacancy, surface plasmon resonance of Bi and heterojunction-construction promoted charge carrier separation and the generation of 1O 2. As a result, BiPO 4 /Bi/CdS exhibited excellent photocatalytic activity in ofloxacin degradation with 93% degradation efficiency and 55% mineralization efficiency under the joint action of 1O 2 and h+ as reactive species. More importantly, the mechanism of BiPO 4 /Bi/CdS type-II heterojunction was set forth from the coupling of charge carriers and exciton effects. This work sheds new light on the regulation of excitonic effects in type-II heterojunction and provides unique insight into 1O 2 production. [ABSTRACT FROM AUTHOR]

[Display omitted] • CeO 2 /Cu 2 O nanowire arrays with oxygen vacancies grow on Cu mesh. • CeO 2 and Cu 2 O construct special S-type heterojunction. • The built-in electric field established by CeO 2 /Cu 2 O effectively separates photogenerated carriers to promote free radical generation. • Formaldehyde, xylene and toluene are rapidly degraded and mineralized on CeO 2 /Cu 2 O/Cu. • CeO 2 /Cu 2 O/Cu mesh can be directly assembled in an air purifier. Photocatalyst-governing degradation of VOCs emitted from household products is promising due to its high performance and long-term durability. In this study, unique hierarchical CeO 2 /Cu 2 O nanowire arrays with S-scheme construction grow on a Cu mesh through a simple wet chemical method. Abundant oxygen vacancies on CeO 2 work as adsorption sites, and the effective separation of photogenerated carriers driven by built-in electric field in the S-scheme CeO 2 /Cu 2 O heterojunction generates mobile reactive oxygen radicals for oxidizing target VOCs. Spectra of Kelvin probe force microscopy (KPFM) reveal that the potential difference at the CeO 2 /Cu 2 O interface grows from 9 mV in dark to 29 mV under irradiation, demonstrating a powerful force for driving the migration of photoelectrons. Therefore, under simulated sunlight exposure, 50 ppm of toluene, xylene and formaldehyde can be completely degraded in 70, 50 and 6 min by 15 cm2 CeO 2 /Cu 2 O mesh, respectively. The elimination of actual indoor VOCs confirms the practicability of the self-supporting CeO 2 /Cu 2 O catalyst, which figures out new ideas for designing efficient photocatalysts for the removal of VOCs pollutants. [ABSTRACT FROM AUTHOR]

Porous organic polymers have been considered potential materials for synthesizing molecules by selective activation of bonds of visible light photocatalytic catalysis. However, the low charge mobility and weak interface conductivity prohibited further application. Herein, three new polymers with fluorene as donor and benzothiadiazole by halogen substitution (F or Cl) as acceptor unit were successfully synthesized and further constructed heterostructure with g-C 3 N 4. DClB-BTDF/g-C 3 N 4 heterojunctions exhibited superior photocatalytic activity for the selective oxidation of sulfides to sulfoxides under visible-light illumination, the highest activity reached > 98 % of conversion in a short time, which was more than two times higher than that of pristine DClB-BTDF. This is mainly attributed to the enhanced carrier separation efficiency of DClB-BTDF/g-C 3 N 4. Our finding could provide further insights into the design and synthesis of the halogenation strategy of polymer/g-C 3 N 4 heterojunctions. [Display omitted] • Three benzothiadiazole-conjugated polymers were synthesized and finely tuned through halogen substitution. • Three polymers/g-C 3 N 4 heterojunctions were assembled for the selective oxidation of sulfides. • Excellent photocatalytic product selectivities (up to 99 %) were displayed for the selective oxidation of sulfides. [ABSTRACT FROM AUTHOR]

In this work, a promising strategy was established to regulate the coordination environment of Bi active sites through metal atom doping. Interestingly, the doped Co in BiO quantum dots (QDs) are atomically dispersed in the second coordination shell, and can promote the hybridization and redistribution of atomic orbitals, thus improving the interaction with C 2p orbital in CO 2 molecules. The Co single atom located at the secondary coordination shell changes the work function of BiO QDs, thereby facilitating the transfer of photogenerated electrons from Co to Bi active sites, and thus more long-lived electrons can take part in the CO 2 reduction reaction. Additionally, the free energy calculations demonstrate that the existence of Co single atoms in secondary coordination environment is conducive to reduce the formation energy barriers as well as boost the stability of the intermediate *COOH, thus promoting the catalytic performance towards CO 2 reduction. [Display omitted] • For the first time Co single atom act as the coordination atom in secondary coordination environment. • Co single atoms contribute electrons to neighboring Bi atoms, thus increasing the electron density of Bi active sites. • The adsorption and activation capacity of CO 2 molecules at Bi active sites are improved. • The stability of intermediate *COOH has been greatly improved during the catalytic reaction process. [ABSTRACT FROM AUTHOR]

Target recognition and preferential degradation of toxic chemical groups remain critical challenges in photocatalytic degradation of organic contaminant. In this study, the concept of group-imprinting was first proposed, and group-imprinted copolymers of aniline and pyrrole were grafted from the surface of magnetic CuFeO 2 @MnO 2 nanocomposites (MIP-CuFeO 2 @MnO 2) using acrylamide as dummy templates for imprinting the amide group of tetracycline for the first attempt, and the molar ratios of dummy template molecule to functional monomer was optimized. The magnetic MIP-CuFeO 2 @MnO 2 showed high adsorption capacity and good recognition for tetracycline. In mixture solution of tetracycline and ibuprofen, the distribution coefficient (k d) value of MIP-CuFeO 2 @MnO 2 for tetracycline was 0.308 L/g, which is 6.86 times more than for ibuprofen (only 0.045 L/g). The selection factor (α) of MIP-CuFeO 2 @MnO 2 is about 3.2 times that of non-imprinted counterpart, indicating that the imprinting cavities in copolymer layer which match with the amide groups of tetracycline can selectively recognize and adsorb tetracycline. More importantly, MIP-CuFeO 2 @MnO 2 exhibited preferential degradation performance for amide groups, which was confirmed by the intermediates and degradation pathway. The E. coli growth suggests effective toxicity reduction of tetracycline due to the preferential degradation of amide groups by photocatalysis of MIP-CuFeO 2 @MnO 2. [Display omitted] • The concept of group-imprinting was first proposed. • Magnetic group-imprinted CuFeO 2 @MnO 2 (MIP-CuFeO 2 @MnO 2) was prepared. • The matching of imprinting cavities with amide groups contributes to specific recognition. • MIP-CuFeO 2 @MnO 2 exhibited preferential degradation of amide groups. • Toxicity reduction of tetracycline was attributed to preferential degradation of amide groups. [ABSTRACT FROM AUTHOR]