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Perovskite has attracted a lot of attention in the area of present-day environmental catalysis because of its cheap cost, excellent stability, great catalytic activity, varied structure, and significant transformation flexibility. In order to remove organic contaminants from wastewater, researchers have been experimenting with combining perovskite catalysts with advanced oxidation processes (AOPs). Herein present study, LaCoO3 was synthesized and calcined at 450, 650, and 850 °C (LC450, LC650, and LC850), and the connections between their surface features and crystalline assembly to catalytic performance were thoroughly explored to activate peroxymonosulfate (PMS) in order to degrade aqueous organic contaminants. Further, the catalysts were characterized by XRD, FTIR, FSEM, and TEM, and their catalytic efficiency was investigated. The Co-O bond length is recommended as a biomarker for PMS activation because it strongly influences the Co2+/Co3+ redox capability, regulating the total PMS activation. LC850/PMS has demonstrated the highest degradation efficiency (79%), with kapp value 0.102 min−1. Further modification of these types of perovskite catalysts might be very feasible and promising to degrading organic pollutants. [ABSTRACT FROM AUTHOR]

Since traditional wastewater treatment techniques only partially remove antibiotics like metronidazole (MTZ), the rising use of these drugs causes their entry into wastewater and receiving surface waterways. A flexible method that may effectively degrade such organic pollutants is adsorption assisted photocatalytic degradation. Herein, an easy mixing-and-heating procedure was used to synthesize visible light-induced g-C3N4/Co3O4 heterojunction photocatalysts. The structural properties and morphology of as-prepared materials were measured using characterization techniques such as FTIR, FSEM, and XRD analysis. The as-prepared catalyst has demonstrated a remarkable adoption and photocatalytic performance in degrading MTZ. It was found that 0.2 weight percent of Co3O4 was the optimum amount for achieving the best photocatalytic efficiency. A key factor in boosting photo-generated carrier separation is the synergistic interaction between g-C3N4 and Co3O4. The kinetics study of MTZ adsorption and degradation as well as factors effecting such as pH (2-10) and catalyst dosage process were investigated. The functional treatment method attained 78% degradation of MTZ under the following general conditions: pH = 6, g-C3N4/Co3O4 = 0.04 g/L, and reaction time = 200 min and MTZ concentration = 20 mg/L. A possible mechanism for the photocatalytic degradation was introduced, wherein O 2 • − was found to be the leading radical, whereas h + and H O • radicals contribute moderately to the degradation process. The research presents an appealing and environmentally friendly technique for the practical remediation of waste water carrying antibiotics. [ABSTRACT FROM AUTHOR]

Functionally modified coated capillary is essential for reducing the nonspecific interaction between samples and analytical instruments and improving detection sensitivity and analytical efficiency. Here, we used perfluorooctanoic acid and diazo resin as raw materials, and bonded them to the inner wall of the capillary through the electrostatic interaction of the coupling agent to construct a self-assembled coating tube with anti-fouling properties. The dynamic adsorption test of fluorescent protein confirmed that the coating had obvious anti-protein adsorption effect. The coating was used for capillary electrophoresis (CE) analysis of four mixed protein standard samples and egg white samples. The excellent protein separation spectrum confirmed the application value of the coating. [ABSTRACT FROM AUTHOR]

Carboxymethyl chitosan (CMCS) was modified by ribavirin (RTC), and then the ribavirin-modified carboxymethyl chitosan (RTC-CMCS) was blended with polyvinyl alcohol (PVA) by electrospinning technology to prepare nanofibers with high antibacterial, antiviral and good biocompatibility, which can be used in wound dressings and other fields. [ABSTRACT FROM AUTHOR]

The inhibitory peptide library and functional short peptide RLFGKIW were synthesized by solid-phase synthesis and dichotomous method, and the inhibitory effect and cytocompatibility of the peptide library and peptide chain on breast cancer at the cellular level were evaluated by MTT method. [ABSTRACT FROM AUTHOR]

A short chain antimicrobial peptide SFPAS was screened by cell membrane chromatography combined with one bead and one object method. The membrane chromatographic fillers with particle size of about 2 μm were prepared. Through field emission scanning electron microscope observation, we could see the successful preparation of membrane chromatographic packing. Then, the antibacterial activity of antimicrobial peptides was tested, and it was found that the selected antimicrobial peptides had obvious antibacterial activity and could effectively kill Staphylococcus aureus and Escherichia coli. [ABSTRACT FROM AUTHOR]

Because of the problem of the proliferation of drug-resistant pathogenic bacteria caused by antibiotics in recent year, we designed an antimicrobial peptide chain and successfully synthesized a new antimicrobial peptide chain by one-strain-one-product method. The peptide chain has excellent stability and has excellent antibacterial effects on Escherichia coli and Staphylococcus aureus. At the same time, it has excellent biocompatibility, which provides a new material for replacing antibiotics in the future. [ABSTRACT FROM AUTHOR]

The aging process of paper will be accelerated by acidification behavior during the storage process of paper archives, and the mechanical properties of paper archives will be weakened. By deacidizing and strengthening, the further aging of the acidified archives paper can be delayed or prevented, and the mechanical properties can be improved, so that the service life of paper archives is prolonged. To delay even to prevent the aging process, deacidizing and strengthening technology is employed. Herein, the "hybrid" system was reported by combining nano-calcium carbonate as deacidification agent, modified hydroxypropyl cellulose as reinforcement agent and ethanol as dispersant. The artificially acidified paper was brushed with it, and the pH value, mechanical properties and whiteness were measured to study the effect of deacidification and reinforcement. The results showed that oleic acid was successfully grafted onto hydroxypropyl cellulose by N,N′-carbonyl diimidazole mediated method to obtain oleic acid grafted hydroxypropyl cellulose with good dispersion in ethanol. After treating acidified paper with "hybrid" system, the pH value and the tensile strength index increase, the whiteness is almost unchanged, that is, the use of "hybrid" system plays a good deacidifying strengthening effect. The acidified paper samples before and after treatment with "hybrid" system were subjected to dry-heat aging treatment. Compared with acidified paper, the pH value, tensile strength index and whiteness of acidified paper treated with "hybrid" system are effectively inhibited, that is, the use of "hybrid" system can effectively delay the aging and acidification process of paper. [ABSTRACT FROM AUTHOR]

Aging behavior occurs in the storage process of paper archives, which accelerates the aging process of the paper. Therefore, it is important for paper archives management to explore the aging behavior of acidified paper (AP) and to delay or prevent its further aging. The aging behavior of the commonly used university archives paper with artificial acidification were studied by measuring pH value, electrical conductivity, mechanical properties and whiteness. The results show that the pH value, conductivity, mechanical properties and whiteness of AP change significantly compared with the non-acidified raw paper (P). After dry-heat aging treatment, the pH value of AP decreased more obviously than P, which shows more obvious aging degradation and further acidification of AP. During the aging process of AP, the molecular and structural degradation are promoted by the presence of acidic substances, which increase the electrical conductivity of the system. The microstructures of the paper are changed by acidification and aging treatment, and more fiber fracture, etching and microscopic holes are found in the surface SEM images. The reductions of the tensile index and whiteness of AP are also more significant because of the degradation acceleration of the acid. [ABSTRACT FROM AUTHOR]

Mesoporous silica microspheres, a multifunctional material with high specific surface area, pore size, and mechanical properties, are widely used as separation and support materials. Mesoporous silica, has been relatively studied as LC column packing material for separation and detection. In this research, we prepared mesoporous silica microspheres by a simple synthesis method, and the antibacterial modification of mesoporous silica was carried out by adding synthesized PTHP. Excellent test results have been exhibited, the PTHP-SiO2 mesoporous has the same structure and morphology as the SiO2 microspheres, but shows excellent bacterial inactivation ability, and better separation as LC column packing material, thus can be applied as a multifunctional material. [ABSTRACT FROM AUTHOR]

Through the study of the molecular formula of p1-AQM2AF, it is found that 9-methylenedecane, as the electron donor system, has strong electron donor capacity, but due to its huge steric hindrance, the p1-AQM2AF molecule may be seriously distorted, resulting in the reduction of the fluorescence quantum efficiency of p1-AQM2AF due to the angular momentum energy loss during the electron transmission process. Therefore, we have made a bold guess, The length of alkyl chain may also be one of the factors affecting the fluorescence efficiency of D-A-D conjugated small molecules. We converted the 9-methylene-19decane originally attached to the molecule into 3-methylenenonane, and explored its influence on the fluorescence molecule by reducing the length of the donor alkyl chain. [ABSTRACT FROM AUTHOR]

Column laminating silica gel board plays a very important role in the separation and analysis of organic synthesis, which can monitor the progress of chemical reactions in real time and help researchers determine the time when chemical reactions are completed. In this work, we made a modified silicone powder for the separation and analysis of thiophene substances, and found that the modified silicone powder has a better separation effect than commercial silicone powder, which is expected to play a better role in the field of column chromatography separation. [ABSTRACT FROM AUTHOR]

Malignant tumor is one of the most important causes of death in the world today. At present, the successful cure cases of tumor patients are mainly due to the timely treatment of tumors. Therefore, it has become one of the urgent problems for human beings to find tumors as soon as possible and how to completely eradicate them. The technology of simultaneous imaging and treatment through photoinitiation is a promising strategy to fight cancer. In the previous research, we developed a new small molecule p-QM2AF for photothermal therapy, but the low fluorescence efficiency (QY) in the NIR-II range made it necessary to modify it. In this paper, we obtained better imaging and photothermal conversion performance by grafting two 9- methylene nonadecanes onto the p-QM2AF sub-receptor. [ABSTRACT FROM AUTHOR]

A water-soluble fluorescent conjugated molecule (F-DPP-F) was prepared by introducing peg side chains to improve aqueous solubility, employing molecular design of D-A-D structure to reduce the size, and using electron withdrawing DPP as the acceptor unit. Then the optical properties of nanoparticles were analyzed by UV-vis-NIR. The nanoparticles were evaluated for safety using a cytotoxicity test, and the photothermal properties were characterized. [ABSTRACT FROM AUTHOR]

The aging and acidification behavior of paper archives affect their long-term preservation. Therefore, delaying or preventing aging and acidification has become an important topic in the field of paper archives management. the aging and acidification behavior of commercial archival paper were studied by measuring pH value, electrical conductivity, mechanical properties and whiteness in this work. The results show that the aging and acidification phenomena are obvious after dry-heat aging treatment. The molecular degradation of cellulose, hemicellulose, lignin and other components results in the decrease of pH value of the system, which decrease with the increase of the treatment temperature and time. The electrical conductivity of the system increases because of the molecular degradation and structural degradation, and with the increase of the treatment temperature and time, the electrical conductivity increases more significantly. After aging treatment, the paper appears etching and increasing microcosmic pores. With the occurrence of molecular degradation and structural degradation, the tensile index and whiteness of the paper decrease, and with the increase of the treatment temperature and time, the tensile index and whiteness decrease more significantly. [ABSTRACT FROM AUTHOR]

In this paper, we provide the adsorption behavior of lysozyme on the inverse colloidal crystal (ICC) membrane under different parameters (such as temperature, pH value, adsorption time). Besides, this also studied lysozyme adsorption behavior by changing the Hydroxyethyl methacrylate (HEMA) ratio of the ICC membrane. Furthermore, we found that ICC membranes containing Hydroxyethyl methacrylate have significantly improved lysozyme adsorption than ICC membranes without Hydroxyethyl methacrylate. With the increasing lysozyme concentration, the ICC membrane containing 50% HEMA showed an excellent selective adsorption effect. At the same time, we describe the adsorption mechanism of lysozyme on the ICC membrane containing HEMA. Finally, after ten adsorption-desorption cycles on the ICC membrane, the membranes adsorption effect on lysozyme has not significantly decreased. [ABSTRACT FROM AUTHOR]

With excellent mechanical properties and high specific surface area, mesoporous silica microspheres are widely applied in various fields. However, mesoporous silica has been relatively studied as a thin-layer chromatographic (TCL) material for preliminary separation and detection. In this study, we obtained mesoporous silica microspheres with different particle sizes and apertures by a simple synthesis method, and prepare mesoporous silica microspheres-based TCL. Excellent test results have been exhibited, the 4.5 μm mesoporous silica microspheres-based TCL exhibits better separation results in dye and fluorescent polymer separation experiments, thus expanding the application of mesoporous silica microspheres. [ABSTRACT FROM AUTHOR]

Polymer microspheres have been widely used as a stationary phase in liquid chromatography. We characterized the properties of the novel polyionic liquid microspheres prepared and explored their application as a stationary phase in liquid chromatography. Cytosine, uracil, benzene, benzene homologs and alkaloids were successfully separated by liquid chromatography with the polymer microspheres as packing materials in the chromatographic column. [ABSTRACT FROM AUTHOR]

Recently, hollow structures have attracted much attention due to their high specific surface area, clear interior space, low density and good permeability. Among them, manganese dioxide (MnO2) hollow structure has also been widely studied for catalysis, drug delivery and energy storage. Based on the characteristics of low pH and high GSH concentration in tumor microenvironment, it is possible to develop an intelligent drug delivery system with pH/GSH response based on hollow mesoporous MnO2 nanospheres. In addition, the excellent physical and chemical properties of MnO2 nanomaterials provide conditions for its synergistic photothermal therapy. For example, Mn2+ released after manganese dioxide reacts with GSH can enhance T1-MAGNETIC resonance (MR) imaging. Meanwhile, manganese dioxide can also react with H2O2 in tumor microenvironment to release oxygen and alleviate tumor hypoxia. In order to prevent drug loss during delivery, a GSH-responsive hollow mesoporous manganese dioxide microsphere was selected as the drug carrier in this paper, and a series of studies were carried out on the performance of the carrier. Hollow mesoporous MnO2 nanospheres with particle size below 100 nm were prepared by hydrothermal method, and their response to tumor microenvironment was simulated in vitro. It has been proved that hollow mesoporous MnO2 nanospheres can be desorbed at low pH and GSH response, and can be used to deliver drugs or photothermal agents, as well as for collaborative cancer imaging and treatment. [ABSTRACT FROM AUTHOR]

Using vanadium oxide (VOx) thin film as active layer, microbolometer with gold black absorber was fabricated due to the high mid-infrared (8-14μm) absorption property of gold black. This paper describes the design and fabrication of microbolometer with micromachining surface technology. The characteristics of the device are investigated. The detector performance exhibits maximum detectivity of 1.96 × 108cmHz1/2/W at 17 Hz with 8.8μA. [ABSTRACT FROM AUTHOR]

A novel chiral selector polyacrylic acid-β-cyclodextrin (PAA-β-CD) was successfully prepared, then a facile synthesis of PAA-β-CD stationary phase based on diazotized silica was developed and characterized. Monodisperse silica microspheres were synthesized by a modified Stöber method. The obtained silica particles were functionalized by self-assembly positive charged photosensitive diazoresin (DR) and PAA-β-CD on the surface. The corresponding chiral stationary phase (CSP) was used in HPLC and the enantioseparation performance was investigated in both polar organic and reverse phase mode. Better separation abilities and excellent enantio-selectivities were obtained on PAA-β-CD CSP for antihistamine drugs in the acetonitrile and triethylammonium acetate buffer mobile phase. Abbreviations: AIBN: azodiisobutyronitrile; β-CD: b-cyclodextrin; β-CD-NH2: amino-β-CDcyclodextrin; β-CD-OTs: sulfonyl-b-cyclodextrin; CD: cyclodextrin; CSP: chiral stationary phase; DCC: dicyclohexyl carbimide; DR: diazoresin; MeOH: methanol; NMP: N-methyl pyrrolidone; PAA: polyacrylic acid; PAA-β-CD: polyacrylic acid-β-cyclodextrin; TEAA: triethylammonium acetate; TEOS: tetraethyl orthosilicate [ABSTRACT FROM AUTHOR]

In this paper, the adsorption capacity of CNT modified polyacrylonitrile (PAN) film on copper ions under different conditions was studied by the adsorption experiment of the prepared multilayer diazo resin acidified carbon nanotubes/PAN composite film. The concentration of copper ion solution before and after adsorption was measured by inductively coupled plasma (ICP). The results show that the adsorption capacity of the pan film modified by CNT increases first and then reaches the adsorption equilibrium with the increase of the adsorption time of copper ion, and the adsorption capacity of the pan film modified by CNT increases with the increase of the initial concentration of copper ion and the external temperature With the increase of solution pH, the adsorption capacity of CNT modified polyacrylonitrile membrane to copper ion increases first and then decreases; after multiple desorption/adsorption of the modified membrane which has reached adsorption equilibrium, the membrane still has CNT adsorption capacity to copper ion, indicating that the membrane has excellent recycling performance. [ABSTRACT FROM AUTHOR]

Natural organic nanoparticle cellulose nanocrystals (CNCs) with good biocompatibility and unique physical and chemical properties have been proved to be promising materials for drug delivery systems. In this study, a CNC with rich. It has the property of modifying dendrimers. The polymer has good biocompatibility and stability. TEM shows that CNC has a good particle size, about 154–200 nm. And after modifying the amine group, the polymer still has good dispersibility. Because CNC-NH2 has a good size, it can better bypass the human body clearance system and enter cancer cells. [ABSTRACT FROM AUTHOR]

A MoS2 nanosheets drug delivery system with photothermal conversion ability was synthesized. The drug loading content of the synthesized was as high as 24.5%. The drug HCPT was modified by lipoic acid (LA) and connected onto MoS2 nanosheets through S-Mo bond, which is more stable than physical adsorption. Due to the ester bond between HCPT and MoS2 nanosheets, the drug delivery system could responsively release HCPT when exposed to esterase. [ABSTRACT FROM AUTHOR]

Multilayers' absorption DMDM structure of SiO2/TiNx/SiO2/VOx structure for 8-14 infrared wavelengths is proposed and simulated. Between mid-infrared 8 μm and 14 μm wavelengths, infrared detector with this structure and thermal sensitive VOx of −7%/K TCR, which exhibits high infrared absorption about average 83%, has been fabricated and tested successfully. [ABSTRACT FROM AUTHOR]

The temperature-sensitive inverse macroporous membranes containing thermo-responsive poly (N-isopropylacrylamide) (PNIPAM) were prepared by a template of silica microspheres. The inverse membranes were characterized by SEM, FTIR and contact angle measurements. The PNIPAM containing inverse macroporous membranes had different pore diameters at different temperatures and could be used for separation. The conductivity was measured to characterize the temperature-responsive behavior and permeability of this inverse macroporous membranes. Due to variable pore sizes, the membranes exhibited specific temperature-responsive permeability. This strategy presented here is a simple, low-cost, and controllable alternative for fluidic applications, such as the separation of particles. [ABSTRACT FROM AUTHOR]

In this paper, multilayer diazo resin acidified nanotubes/polyacrylonitrile composite films were prepared by grafting diazo resin (DR) and acidified carbon nanotubes (CNT) onto the surface of commercial PAN hollow fiber films by layer by layer self-assembly method. Scanning electron microscopy (SEM), infrared spectroscopy, contact angle, thermogravimetry (TG), water flux and adsorption of heavy metals were used to study. The results showed that the diazo resin (DR) and acidified carbon nanotubes (CNT) were successfully grafted onto PAN Membrane by layer by layer self-assembly method, and carbonyl and carboxyl groups appeared on the surface of modified PAN Membrane; the layer by layer self-assembly did not damage the original morphology of PAN membrane; the hydrophilicity of modified PAN-(DR-CNT)3 membrane was improved, and the water flux was increased. The PAN membrane before and after modification has similar heat and weight loss, and the PAN membrane before and after modification has good thermal stability; the PAN membrane after modification can reach adsorption equilibrium in a relatively short time, and has good adsorption performance for heavy metal copper ions. [ABSTRACT FROM AUTHOR]

The negative symptoms of schizophrenia without effective therapeutic agents seriously affect the quality of life. Studies investigating the neurobiological mechanisms of the negative symptoms of schizophrenia failed to provide a unanimous conclusion, but generally accepted to be related to the prefrontal cortex (PFC). Resveratrol is a kind of natural plant polyphenol and has a potential role in negative symptoms treatment for its neuroprotective effects. To investigate the metabolic mechanism of the negative symptoms and the therapeutic effect of resveratrol on it, we analyzed the metabolic changes in the PFC of MK-801-induced schizophrenia model using ex vivo 1H nuclear magnetic resonance spectroscopy. And then, after chromic administration of resveratrol, we tested the social interaction behaviors of the schizophrenia model and analyzed the metabolic changes in the PFC. Our results showed that the levels of alanine (Ala), glutamate (Glu), tautine (Tau), glynine (Gly), choline (Cho), and valine (Val) are significantly decreased compared to control animals. The social deficits of MK-801-treated mice are improved after resveratrol administration. And the levels of Glu, Gly, and Cho were reversed after the treatment of resveratrol. In conclusion, our results suggest that the negative symptoms are associated with decreased concentration of Ala, Glu, Tau, Gly, Cho, Val in PFC and the social deficits could be recovered by resveratrol treatment, as well as the levels of Glu, Gly, and Cho in PFC. [ABSTRACT FROM AUTHOR]

The conjugated compound (3Z,6Z)-3,6-bis((5-(9,9-bis(2-octyldodecyl)-9H-fluoren-2-yl) thiophene-2-yl) methylene) piperazin-2,5-dione(p-QM2AF) was synthesized successfully. Nanoparticles (NPs) coated with p-QM2AF compound were prepared from liposomes. The morphology of NPs was characterized by transmission electron microscope and dynamic light scattering instrument, and the NPs maintained high stability after long time storage. Cytotoxicity test was used to evaluate the safety of nanoparticles, and the photothermal properties were characterized. [ABSTRACT FROM AUTHOR]

In this paper, the adsorption of copper ions on the prepared multilayer diazo resin-graphene oxide/polyacrylonitrile composite membranes was studied, and the adsorption capacity of GO modified polyacrylonitrile membranes to copper ions under different conditions was explored. The concentration of copper ion solution before and after adsorption was measured by inductively coupled plasma (ICP). The results showed that the adsorption capacity of GO modified polyacrylonitrile membrane to copper ion increased first and then reached adsorption equilibrium with the increase of adsorption time of copper ion. With the increase of initial concentration of copper ion and external temperature, the adsorption capacity of GO modified polyacrylonitrile membrane to copper ion followed. With the increase of solution's PH, the adsorption capacity of GO modified polyacrylonitrile membranes for copper ions first increased and then decreased. After several desorption/adsorption of the modified membranes which have reached the adsorption equilibrium, the membranes still have good adsorption capacity for copper ions, indicating that the membranes have excellent reuse performance. [ABSTRACT FROM AUTHOR]

In this paper, we report on a successful development and application of diazoresin (DR)/β-Cyclodextrin covalently linked capillary coatings using the layer by layer (LBL) self-assembly technique combined with photochemistry reactions. The modified capillary remarkably suppressed the protein adsorption on the inner surface of silica capillary and successfully separated lysozyme (Lys), myoglobin (Mb), bovine serum albumin (BSA) and ribonuclease A (RNase A). Furthermore, the DR/β-Cyclodextrin covalently linked capillary coatings showed good stability and repeatability. More importantly, this method is more environmentally friendly and simpler than traditional methods for the use of DR instead of highly toxic and moisture-sensitive silane coupling agent. [ABSTRACT FROM AUTHOR]

Bacterial infection is a major challenge for contemporary medicine, and antimicrobial hydrogels have been extensively studied for their excellent antimicrobial activity. However, the antibacterial agent also has high cytotoxicity and hemolytic activity while being significantly antibacterial. In this paper, we prepared a hydrogel by simple heating-cooling of ZIF-90 doped agar solution, which has obvious antibacterial activity against Gram-positive and Gram-negative bacteria. The test results show that the hydrogel has a uniform and stable structure and does not exhibit cytotoxicity and hemolytic activity while maintaining good bacteriostatic properties, so as to achieve the function of bacterial infection treatment and would healthcare. [ABSTRACT FROM AUTHOR]

High-performance liquid chromatography (HPLC) is one of the most widely used separations and analysis methods, which has become an indispensable part of the separation and detection of mixtures, qualitative and quantitative analysis and other scientific research and social production fields. Because of the decisive effect of the chromatographic column on analysis and separation, it has become the core of research in the chromatographic system. In the past decades, the research and development of new chromatographic column stationary phase have been highly concerned. Monodisperse polymer microsphere, because of its special large pore structure, has good permeability and high specific surface area, which can be used as special materials in various fields, such as adsorption materials in the separation process, HPLC column packing, catalyst carrier, preparation template of nanomaterials and nuclear fusion targeting materials. When it is used in HPLC, because of the good permeability of microspheres, it can effectively improve the separation efficiency and performance. In this article, based on the previous work, a number of new polymer microspheres were prepared, and the prepared microspheres were used for the separation and detection of HPLC, and their physical and chemical properties were studied. [ABSTRACT FROM AUTHOR]

In this article, we adopted the coprecipitation preparation SrSn(OH)6 precursor and then uses the two calcination was prepared neodymium-doped SrSnO3 of near-infrared light-emitting materials, the material under the 588 nm excitation wave excitation, at around 1060 nm and 1070 nm, conforms to the characteristics of near-infrared light, by X-ray diffraction, scanning electron microscope, and fluorescence characterization, such as determining the nature and characteristics of the material. This material has a great application prospect in biological imaging. [ABSTRACT FROM AUTHOR]

Magnetic composites have been widely used in the area of wastewater treatment, which own the properties of simple and quick adsorption and separation functions. This article presented a cost-effective and chemically modified adsorbent (Fe3O4@SiO2@Chitosan) based on a novel facile light-assisted technique for methyl orange (MO) removal. The characterization results of FT-IR, TEM, XRD and the hysteresis loop showed that Fe3O4@SiO2@Chitosan was successfully prepared. The adsorption properties of the magnetic Fe3O4@SiO2@Chitosan composite had been discussed in detail. Results show that the magnetic composite was able to remove more than 99.15% of dyes in water under optimized conditions. The Fe3O4@SiO2@Chitosan composite was stable and easily recovered, which demonstrated that the Fe3O4@SiO2@Chitosan can be successfully used as a reusable absorbent for effective removal of methyl orange from wastewater. [ABSTRACT FROM AUTHOR]

In this paper, a multilayer diazo resin-graphene oxide/polyacrylonitrile composite membrane was prepared by layer-by-layer self-assembly and UV-induced modification of commercial polyacrylonitrile (PAN) hollow fiber membranes grafted with diazo resin (DR) and graphene oxide (GO). Scanning electron microscopy (SEM), infrared spectroscopy, contact angle, thermogravimetric analysis (TG), water flux and adsorption properties of heavy metals were studied. The results showed that diazo resin (DR) and graphene oxide (GO) were successfully grafted onto PAN membranes by layer-by-layer self-assembly. Carbonyl and carboxyl groups appeared on the surface of the modified PAN membranes; layer-by-layer self-assembly modification did not destroy the original morphology of PAN membranes, resulting in smaller pore size and higher surface roughness; hydrophilicity of the modified PAN-(DR-GO)3 membranes. The contact angle of pure water decreases from 87.8 degrees to 55.5 degrees, and the water flux increases from 733.30 g.m−1.h−1 to 1250.48 g.m−1.h−1. The thermo gravimetric curves of PAN films before and after modification did not change significantly, and the PAN films before and after modification had good thermal stability. The modified PAN membrane can achieve adsorption equilibrium in a relatively short time, and has good adsorption performance for heavy copper ions, with the adsorption rate as high as 92%. [ABSTRACT FROM AUTHOR]

A kind of red emissive carbon dots (R-CDs) that were synthesized by a hydrothermal method reacted with PEG polymer (mPEG-CHO) as nanocarriers (R-CD@mPEG-CHO). DOX was selected to be the model drug and loaded on the surface of R-CDs by physical adsorption. The mPEG-CHO polymer reacted with R-CDs and the benzoic acid-amine bond was formed through click reaction, which enabled the R-CD@mPEG-CHO to have pH responsive ability in tumor microenvironment and achieved controlled drug release. And PEGylation can suppress drug burst release in vitro. A potential multi-functional nanocarrier system was successfully built. [ABSTRACT FROM AUTHOR]

In this article, a magnetic-responsive microfiltration membrane based on three-dimensional (3 D) inverse colloidal crystal (ICC) was prepared with relatively simple approach. We designed the ICC membrane using self-assembly of Fe3O4@SiO2 colloidal crystal into a colloidal crystal template. The resulting close-packed colloidal crystal was infiltrated with a reactive monomer solution. After polymerization, the silica spheres were etched away, resulting in an ICC membrane with Fe3O4 nanoparticles inside. The typical ICC membrane was characterized by SEM and XRD. Meanwhile, We used the KCl diffusion to test the permeability of the membrane. The results illustrated that the highly ordered permeable polymer membrane was successfully prepared by using Fe3O4@SiO2 colloidal crystals as the templates. Furthermore, the functional ICC membrane exhibited excellent magnetic-responsive gating property to separation. The smart environment-responsive gating membranes have potential applications in filtration, sensors and other applications. [ABSTRACT FROM AUTHOR]

Metal–organic frameworks (MOFs) are permanently microporous materials. MOFs have become promising candidates as drug delivery hosts because of high specific surface area. In this work, we control preparation of a new core–shell microsphere NaYF4:Yb,Er@NaYF4:Nd@MIL-53 by layer-by-layer self-assembly method. Here upconverting fluorescent nanoparticles (UCNPs) NaYF4:Yb,Er@NaYF4:Nd has potential for bioimaging due to excellent NIR optical property. MIL-53 as a drug carrier for DOX delivery. Folic acid as targeting agent is encapsulated into the above core-shell structured to form new nanocomposite (UCNPs@ MIL-53/FA). We have found that the new core–shell nanocomposites are nontoxic toward human cervix adenocarcinoma (HeLa) and can simultaneously achieve targeted therapy and drug delivery are used for the treatment of cancer. This result is expected to provide new ideas and perspectives for the treatment of cancer of the tumor. [ABSTRACT FROM AUTHOR]

Post-cleavable block copolymer is a very important class of materials, especially for the preparation of nanochannel materials. Block copolymers can self-assemble to various nanostructures. By adding specific groups between two blocks, we can obtain the materials we need. Here, we synthesized a block copolymer with acid-cleavable junction. Polyethylene oxide and polymethyl methacrylate with chalcone structure （PEO-Ac-PChal）were synthesized by atom transfer radical polymerization (ATRP). After the acetal structure is acidified, one of the blocks was dissolved by a specific solvent, and the nanochannel structure was prepared. [ABSTRACT FROM AUTHOR]

In the present study, we have developed a green, facile, eco-friendly and cost-effective approach for the synthesis of copper nanoparticles (CuNPs) from copper salt (CuCl) solution by using Camelia sinensis leaf extract. The biomolecules present in C. sinensis leaves extract were responsible for the reduction and stabilization of CuNPs. The synthesized nanoparticles were characterized by using FT-IR, SEM, TEM and EDX analysis. FT-IR analysis was used to ratify the presence of biomolecules in C. sinensis leaves extract, while SEM and TEM analysis showed that the synthesized nanoparticles are in agglomerated form and having an average size of 60 ± 6 nm. The percentage weight of synthesized nanoparticles was measured through EDX analysis. Moreover, the photocatalytic degradation of synthesized CuNPs was also evaluated by using bromophenol blue (BPB) dye under sunlight irradiation. The maximum photo-degradation of BPB dye was up to 83.7%. UV-Vis spectral analysis of CuNPs proved them as an efficient photocatalyst in dye degradation. [ABSTRACT FROM AUTHOR]

Redox and pH double stimulus-responsive drug delivery platform based on chitosan (CS), carbon dots (CDs) and hyaluronic acid (HA) gated mesoporous silica nanoparticles (MSN) for drug delivery. The DDS showed excellent drug loading and release properties with good biocompatibility. In addition, the DDS exhibited fluorescence bioimaging properties. The prepared MSN-CS-CDs@HA is demonstrated to be a promising cancer treatment platform. [ABSTRACT FROM AUTHOR]

Hollow mesoporous silica and carbon quantum dots play an important role in the field of biological applications. In this study, a nano-scale hollow mesoporous silica nanosphere (HMSN) was used as the main body of a drug transport system, which filled with a small amount of carbon quantum dots. The hollow mesoporous silica structure provides a large specific surface area and cavity structure for efficient drug loading. And the carbon quantum dots could provide good fluorescence for imaging. By filling carbon quantum dots inside of silica nanospheres and in mesopores on the surface, the hollow mesoporous silica nanospheres became fluorescent and could be used as a fluorescent probe. And the potential photothermal effect of the internal carbon quantum dots also makes it possible to achieve controlled drug release through temperature changes. [ABSTRACT FROM AUTHOR]

In recent years, preparation of metal nanoparticles has developed a matter of great interest in overcoming different challenges such as environmental pollutants and infectious diseases. Herein, biogenic synthesis of iron nanoparticles (FeNPs) was achieved using aqueous peels extract of Ficus carica as a reducing and stabilizing agent. The structure and properties of the synthesized Iron nanoparticles were investigated by SEM, EDX, TEM, FTIR and UV–Vis spectroscopy, and further assessed for their photocatalytic activity. A great photocatalytic degradation had been observed upon treatment of FeNPs with methylene blue dye. It reached near 81% for methylene blue after 30 hrs. These results confirmed that the synthesis of FeNPs by green chemistry improves its properties and can be utilized as a promising strategy for photocatalytic and other applications. [ABSTRACT FROM AUTHOR]

A novel method for the preparation of covalently linked capillary coatings of polystyrene-poly (ethylene oxide) (PS-PEO) was demonstrated by using photosensitive diazoresin (DR) as coupling agents. Layer by layer (LBL) self-assembly membrane of DR and PS-PEO based on hydrogen bonding firstly was fabricated on the inner wall of capillary, then with the treatment of UV light through the unique photochemistry reaction of DR, the hydrogen bonding was converted into covalent bonding. The covalently bonded coatings have the ability of inhibiting protein adsorption on the inner surface of capillary, and thus a baseline separation of Lysozyme (Lys), cytochrome c (Cyt-c), bovine serum albumin (BSA), ribonuclease A (RNase A) and myoglobin (Mb) was achieved by using capillary electrophoresis (CE). Compared with bare capillary or non-covalently bonded DR/PS-PEO coatings, the covalently linked DR/PS-PEO capillary coatings improved the CE separation performance for proteins; what's more, it exhibited good stability and repeatability. This method can provide a green and easy way to make the covalently coated capillaries for CE, replacing of the old way which using highly toxic and moisture sensitive silane coupling agent by DR in the covalent coating preparation. [ABSTRACT FROM AUTHOR]

Industrial waste recycling is a considerable approach to solve environment and economy issue. Chlorophyl-extracting waste oil (CWO) is a kind of industrial waste with sticky, dark-color quality, which is similar to aromatic hydrocarbon oil (AHO), a kind of rubber operating oil. Thus, CWO was tested to be used as rubber operating oil in this work. In most cases, such as tensile properties, tearing properties, abrasion properties and so on, CWO played a perfect role as AHO. However, CWO was better than AHO in curing properties, compatibility and DMA testing. Therefore, CWO is a considerable operating oil to substitute AHO. [ABSTRACT FROM AUTHOR]

PAN hollow fiber functional membrane with heavy metal ion adsorption capacity was prepared via layer-by-layer method using diazo-resin (DR). Ethylenediaminetetraacetic acid (EDTA) and graphene oxide (GO) with chelating function were used as modifier. Modification effect was studied by Fourier Transform Infrared Spectrometer (FTIR), contact angle test, scanning electron microscopy (SEM) and the copper ion adsorption capacity measurement. The result showed that EDTA and GO were successfully grafted on the surface of modified membrane and the hydrophilicity of the modified membrane increased. Roughness of membrane surface increased when the functional groups introduced on the surface. Adsorption for Cu2+ of modified membrane significantly improved. [ABSTRACT FROM AUTHOR]

We reported a new method for preparing coated capillaries in this paper. First, we combined hydroxypropyl cellulose (HPC) and 2-Methacryloyloxyethyl phosphorylcholine (MPC) to form hydroxypropyl cellulose-poly (2-Methacryloyloxyethyl phosphorylcholine) (HPC-PMPC) by atom transfer radical polymerization (ATRP). Then the photosensitive polymer diazoresin (DR) was used as a linker to the inner wall of the capillary, and finally exposed to ultraviolet light to form a stable covalent bond coating. Protein adsorption on the inner surface of capillary was effectively inhibited. The cytochrome c (Cyt-c), lysozyme (Lys), ribonuclease A (RNase A) and bovine serum albumin (BSA) were separated obviously using capillary electrophoresis (CE) within 15 minutes and showed good stability and repeatability. [ABSTRACT FROM AUTHOR]

Polyethylene glycol (PEG) functionalized graphene quantum dots (GQDs-PEG) with average particle size of 2.1 nm were successfully prepared by hydrothermal method with PEG as surface passivation agent. The quantum yield (QY) of GQDs-PEG was 3.7%and its physiological stability was significantly better than that of GQDs. The cell viability assay results showed that GQDs-PEG display no obvious toxicity to cells. The results of cell fluorescence imaging showed that GQDs-PEG could enter the whole cell with high fluorescence recognition. [ABSTRACT FROM AUTHOR]

Covalently linked capillary coating of sodium polystyrene sulfonate (PSS) is prepared using the layer by layer self-assembly technique combined with photochemistry reactions. PSS coating based on ionic bonding was first assembled on the inner wall of capillary by using photosensitive diazoresin (DR) as the coupling agent, and then the ionic bonding was converted into covalent bonding after treatment with UV light through a unique photochemistry reaction of DR. DR/PSS covalent coating resisted protein adsorption on the inner surface of the capillary, and thus a baseline separation of various proteins (Lys, Cyt-c, BSA and RNase A) was achieved in a short time by capillary electrophoresis (CE). Compared with bare capillary and uncrosslinked DR/PSS coating, the covalent coating has good stability and reproducibility. Because of the replacement of highly toxic and moisture-sensitive silane coupling agent by DR in the covalent coating preparation, this method may provide a green and easy way to make the covalently coated capillaries for CE. [ABSTRACT FROM AUTHOR]