ACS Applied Materials & Interfaces
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2018
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IF 8.097
Dongxing Tan,Jianling Zhang,Jinbiao Shi,Shaopeng Li,Bingxing Zhang,Xiuniang Tan,Fanyu Zhang,Lifei Liu,Dan Shao,Buxing Han
To develop photocatalysts with desirable compositions and structures for improving the efficiency and selectivity of CO2 conversion to CH4 under mild conditions is of great importance. Here, we design an effective photocatalyst of bimetal (Ag/Pd) nanoalloys supported on nitrogen-doped TiO2 nanosheet for CO2 conversion. Such a novel photocatalyst combines multiple advantages of abundant Ti3+ ions, oxygen vacancies, and substitutional nitrogen that are favorable for catalyzing CO2 reduction. It was found that CO2 could be efficiently transformed to CH4 under mild conditions, i.e., in aqueous solution and at atmospheric pressure and room temperature. The maximum production rate of CH4 can reach 79.0 μmol g–1 h–1. Moreover, the Ag/Pd bimetals supported on N-doped TiO2 nanosheet exhibit high selectivity to CH4. The as-synthesized photocatalyst can be well recycled for CO2 reduction.
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ACS Applied Materials & Interfaces
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2018
·
IF 8.097
Rongfeng Tang,Xiaomin Wang,Chenhui Jiang,Shiang Li,Weifeng Liu,Huanxin Ju,Shangfeng Yang,Changfei Zhu,Tao Chen
Sb2S3 is a kind of new light-absorbing material possessing high stability in ambient environment, high absorption coefficient in the visible range, and abundant elemental storage. To improve the power conversion efficiency of Sb2S3-based solar cells, here we control the defect in Sb2S3 absorber films. It is found that the increase of sulfur vacancy is able to upgrade photovoltaic properties. With the increase in sulfur vacancy, the carrier concentrations are increased. This n-type doping gives rise to an upshift of the Fermi level of Sb2S3 so that the charge transport from Sb2S3 to the electron selection material becomes dynamically favorable. The introduction of ZnCl2 in film fabrication is also found to regulate the film growth for enhanced crystallinity. Finally, the photovoltaic parameters, short-circuit current density, open-circuit voltage, and the fill factor of the device based on the Sb2S3 film are all considerably enhanced, boosting the final power conversion efficiency from 5.15 to 6.35%. This efficiency is the highest value in planar heterojunction Sb2S3 solar cells and among the top values in all kinds of Sb2S3 solar cells. This research provides a fundamental understanding regarding the properties of Sb2S3 and a convenient approach for enhancing the performance of Sb2S3 solar cells.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2018
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IF 3.997
Xin Jin,Sajid Asghar,Mei Zhang,Zhipeng Chen,Lin Huang,Qineng Ping,Yanyu Xiao
N -acetylcysteine modified hyaluronic acid-paclitaxel (NAC-HA-PTX) conjugate was designed to improve the water solubility and oral bioavailability of PTX through mucosal bioadhesion ability. The average size of spherical NAC-HA-PTX micelles was 187 nm with a zeta potential of -25.38 mV. Mucin adhesion study showed that the amount of mucin adhered to NAC-HA-PTX micelles was 1.98-fold greater than that of hyaluronic acid-paclitaxel (HA-PTX) micelles. The fluorescence micrographs showed that the biodistribution sequence of coumarin 6-loaded micelles in the gastrointestinal tract was duodenum > jejunum > ileum, and NAC-modified micelles significantly exhibited better mucoadhesive properties than the corresponding unmodified ones. The pharmacokinetic study showed that the area under the curve (AUC 0-24h ) of NAC-HA-PTX micelles was 2.32-fold and 2.56-fold higher compared to that of HA-PTX micelles and PTX solution (Taxol) after oral administration, respectively. NAC-HA-PTX micelles appear to be a promising drug delivery system to improve the bioavailability of insoluble drugs for efficient tumor therapy via oral administration.
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ACS Sustainable Chemistry & Engineering
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2019
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IF 6.97
Xiaowei Li,Haiyang Zhang,Na Zhang,Shujuan Ma,Junjie Ou,Mingliang Ye
Two kinds of novel zwitterionic hydrophilic interaction liquid chromatography (ZIC-HILIC) materials decorated with phosphorylcholine or sulfobetaine type zwitterionic groups were facilely synthesized employing hydrothermal carbonization (HTC) reaction, in which sustainable carbohydrate (glucose) could be converted into functionalized carbonaceous materials with strong hydrophilicity using a one-step and environmentally mild process. The properties of obtained materials were characterized by helium ion microscopy (HIM), N2 adsorption/desorption measurement, static water contact angle measurement, elemental analysis, Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and ζ-potential. As a result, 26 N-glycopeptides with S/N above 20 could be detected from 150 fmol IgG digests after hydrophilic interaction chromatography (HILIC) enrichment by using as-synthesized material HTC-Glc-10%MPC. The limit of detection in matrix assisted laser desorption ionization-time of flight-mass spectrometry (MALDI-TOF MS) analysis was as low as 5 fmol and enrichment selectivity reached 100:1. Furthermore, 175 N-glycosylation sites in 285 N-glycopeptides from 92 glycoproteins were identified from 2 μL of human serum. This work provided a new, simple, and green way to synthesize an N-glycopeptide enrichment material for liquid chromatography–mass spectrometry/mass spectrometry (LC-MS/MS) analysis of glycoproteomes.
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APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Xueping Dai,Yan Wang,Xiao Wang,Shengrui Tong,Xiaofeng Xie
The surface adsorption is considered to be a very important factor in photodegradation process, especially in the removal of gaseous pollutants. In this work, nitrogen doped reduced graphene (N-GR)/TiO 2 were synthesized to probe the polarity adsorption and photodegradation characteristics of acetaldehyde (polar) and ethylene (nonpolar). Morphology and properties of the samples were revealed by TEM , Raman spectra , photoluminescence spectra, photocurrent , electron spin resonance and so forth. Adsorption of flowing gas and TPD were used to indicate the adsorption ability of the composites towards acetaldehyde and ethylene. In experiments, the difference of nitrogen doping amount can adjust the polarity of N-GR/TiO 2 composites efficiently and then influence their photodegradation performance. Specifically, the N-GR/TiO 2 showed higher acetaldehyde adsorption capacity than GR/TiO 2 , while the GR/TiO 2 possessed the highest adsorptive abilities in ethylene case. In the subsequent photodegradation tests of flowing acetaldehyde, all of the N-GR/TiO 2 samples had removal efficiencies higher than that of GR/TiO 2 . The highest removal efficiency reached by the 2 N-GR/TiO 2 is around 82%. In the ethylene to contrast, the removal efficiency was obtained as 93.8% by GR/TiO 2 , which is higher than that of the N-doped samples. It can be seen that the high polarity samples could improve the adsorption and photodegradation performance of polar molecules , which could propel the understanding and application of photodegradation technologies.
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ACS Applied Energy Materials
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2018
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IF 0
Nan Jia,Qiaozhen Xu,Fengqi Zhao,Hong-Xu Gao,Jiaxin Song,Pei Chen,Zhongwei An,Xinbing Chen,Yu Chen
The electrochemical kinetics of oxygen reduction reaction (ORR) determines the energy conversion efficiency of fuel cells and metal–air batteries. Thus, developing efficient and low-cost electrocatalysts for the ORR has attracted mounting attention. Herein, a facile synthetic route is presented to achieve atomic dispersion of Fe–Nx species in N doped porous carbon nanocages, resulting in a single-atom ORR electrocatalyst. The obtained Fe/N codoped carbon nanocages exhibit a comparable half-wave potential (0.82 V) and higher limiting current density compared to the commercial Pt/C electrocatalyst. In addition, by using it as air electrode electrocatalyst, the assembled Zn–air battery device shows a specific capacity of 705 mAh g–1 at 5 mA cm–2 and a negligible voltage loss after continuous operation for 67 h. The superior performance of Fe/N codoped carbon nanocages is attributed to the porous structure and the synergetic effect of atomically dispersed Fe–Nx species and N doping.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2019
·Vol. 136
·期 46
·48237
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IF 2.188
Feng Gao,Yifang Mi,Xinlei Wu,Jun Yao,Qi Qi,Zhihai Cao
Stimuli-responsive polymeric nanogels hold great potential in biological applications. In this work, thermoresponsive polymeric nanogels were conveniently prepared through inverse miniemulsion polymerization of two monomers with a good biocompatibility, N -vinylcaprolactam and 2-methoxyethyl acrylate. A macromolecular crosslinker, poly(ethylene glycol) dimethacrylate (PEGDMA), was used to achieve a better thermoresponsiveness, compared with low-molecular-weight crosslinkers. The prepared poly( N -vinylcaprolactam- co -2-methoxyethyl acrylate) (poly(NVCL- co -MEA)) nanogels could be well redispersed in aqueous systems, displaying a reversible thermoresponsive transition behavior. The influences of the synthesis parameters including the emulsifier content, PEGDMA content, and monomer composition on the particle properties of poly(NVCL- co -MEA) nanogels both in inverse emulsions and in aqueous dispersions were systematically investigated. Furthermore, the impacts of the monomer composition and PEGDMA content on the thermoresponsiveness of poly(NVCL- co -MEA) nanogels were also studied. Promisingly, the introduction of MEA monomeric units to the copolymer chains only slightly reduced the thermoresponsiveness of poly(NVCL- co -MEA) nanogels. This feature allows to improve the biocompatibility of polymeric nanogels by using MEA as the comonomer without need to compromise the thermoresponsiveness of nanogels. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48237.
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FOOD AND CHEMICAL TOXICOLOGY
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2024
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IF 3.9
Xuerao Lan,Haiyan Huang,Jianjun Liu,Jing Zhao,Guowei Li,Mingyang Zuo,Xiumei Xing,Xiaohu Ren
N-Nitrosodiethylamine (NDEA), a carcinogen in some foods and medications, is linked to liver damage similar to non-alcoholic fatty liver disease (NAFLD). This study explores how NDEA disrupts liver lipid metabolism. Sprague-Dawley rats were given two doses of NDEA (100 mg/kg) orally, 24 h apart. Liver response was assessed through tissue staining, blood tests, and biochemical markers, including fatty acids, lipid peroxidation, and serum very-low density lipoprotein (VLDL) levels. Additionally, lipidomic analysis of liver tissues and serum was performed. The results indicated significant hepatic steatosis (fat accumulation in the liver) following NDEA exposure. Blood analysis showed signs of inflammation and liver damage. Biochemical tests revealed decreased liver protein synthesis and specific enzyme alterations, suggesting liver cell injury but maintaining mitochondrial function. Increased fatty acid levels without a rise in lipid peroxidation were observed, indicating fat accumulation. Lipidomic analysis showed increased polyunsaturated triglycerides in the liver and decreased serum VLDL, implicating impaired VLDL transport in liver dysfunction. In conclusion, NDEA exposure disrupts liver lipid metabolism, primarily through the accumulation of polyunsaturated triglycerides and impaired fat transport. These findings provide insight into the mechanisms of NDEA-induced liver injury and its progression to hepatic steatosis.
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CHEMICAL PHYSICS LETTERS
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2024
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IF 2.8
Xueying Wang,Qian Ma,Yi Wang,Lingyu Li,Dongheng Zhao,Huayushuo Zhang,Bolong Li
Bimetallic MOFs-derived hierarchical WO 3 /ZnWO 4 /CoWO 4 heterostructures were prepared by electrospinning for achieving superior n-butanol-sensing property at low operating temperatures. Porous chain-like structures can gradually transformed into porous mulberry-like structures composed of various accumulated particles as increasing the additive amount of Zn/Co-ZIFs. High selectivity and stability of WO 3 -based composites to 100 ppm n-butanol can be observed at 25 °C, including the large sensitivity of 32 and the fast response/recovery times of 115/179 s. The enhanced gas-sensing performance is primarily ascribed to the increased specific surface area, plentiful polyoxometalate, and effective heterojunctions, obviously promoting surface/interface absorption behavior and electron transport process.
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Journal of Cleaner Production
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2024
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IF 9.7
Shuaishuai Guo,Guowen Peng,Qingming Zeng,Lulin Guo,Chao Zhang,Qingyan Zhang,Xijun Fu,Junwen Lv,Qingyi Zeng
Developing efficient, stable, and user-friendly adsorbents for removing uranium from radioactive wastewater is critical for ensuring the security of nuclear energy development. Here, a fixed adsorbent (nZVI@NC/CF), composed of in-situ derived N-doped carbon (NC) encapsulated nano zero-valent iron (nZVI) coated on carbon fiber (CF), was synthesized via carbonizing Prussian blue decorated CF, and used to synergistically adsorb and reduce UO 2 2+ from contaminated water. The optimized nZVI@NC/CF exhibited an extremely high adsorption capacity of 2120.27 mg g −1 with a superior adsorption rate, and about 56.8 % fixed uranium was reduced into insoluble U(IV) species. This outstanding adsorption activity could be ascribed to the strong reducing property of nZVI and the package of NC that effectively prevented the agglomeration of nZVI and facilitated the adsorption and reduction of UO 2 2+ due to the rich adsorption sites and good charge transport property. The nZVI@NC/CF also showed excellent anti-interference properties and regeneration performance that exhibited great potential in treating real uranium wastewater and extracting uranium from seawater. Mechanism study revealed that the fixation of UO 2 2+ was mainly achieved through the synergistical adsorption by NC and reduction by nZVI, complexation by hydroxyl groups, and hydrolytic precipitation by local OH − . This study underscores the potential of nZVI@NC/CF as a highly effective adsorbent material, and provides valuable insights into developing efficient, stable, and easily manageable materials for uranium recovery.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Zeshuang Kong,Ruiqi Zhang,Jixian Dong,Jiahui Yu,Dafeng Zhang,Junchang Liu,Peiqing Cai,Xipeng Pu
With the increasing needs of people for a better life, the problem of water resources pollution has attracted wide attention. The construction of p-n heterojunction is an effective strategy to promote the removal of pollutants by photocatalysts. In this work, a series of BiOBr/Cu 2 S heterojunction photocatalysts with mass ratios of Cu 2 S have been synthesized successfully by a hydrothermal method combined with grinding method for photocatalytic degradation of tetracycline (TC) and ciprofloxacin (CIP). The results showed that BiOBr/Cu 2 S exhibited superior photodegradation efficiency of TC and ciprofloxacin CIP than BiOBr and Cu 2 S monomers. When the mass ratio of Cu 2 S is 0.15 %, the visible degradation of CIP and TC are 79.2 % in 90 min and 88.5% in 60 min. In addition, the effects of different inorganic ions and pH value on the photocatalytic performance of BiOBr/Cu 2 S were investigated. It was proved that superoxide free radical (•O 2 - ) was the main active species by free radical trapping experiment. The photocatalytic degradation process was further evaluated by total organic carbon and mass spectrometry tests. This work provides a feasible construction strategy for photocatalysts with potential application in water resources pollutants.
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JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2012
·Vol. 88
·期 3
·437-443
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IF 2.168
Min Jia,Hongmin Cui,Weiqun Jin,Lili Zhu,Yu Liu,Ji Chen
BACKGROUND: Rhenium is a rare and valuable metal coexisting with molybdenum in molybdenite and sulfide copper ores and is hard to separate. Methods such as solvent extraction, ion exchange, adsorption, precipitation, etc. have been used to separate and purify Re(VII), and resin ion exchange has been widely investigated and used owing to its convenient operation and relatively low-cost. The main challenge comes from the preparation of resins having high performance and stability. In an earlier study, an N-methylimidazolium functionalized strong basic anion exchange resin was successfully synthesized and used for Cr(IV) extraction. This paper, reports on further synthesis and application of this resin for adsorption and separation of Re(VII) and Mo(VI), especially from copper arsenic filter cake. RESULTS: At pH 6.25, Re(VII) and Mo(VI) can be effectively separated with the N-methylimidazolium functionalized strong basic anion exchange resin, giving a Re(VII) recovery of up to 93.3%, but only 5.1% for Mo(VI). When using the copper arsenic filter cake sample 89.1% Re(VII) recovery was achieved. CONCLUSION: The N-methylimidazolium functionalized strong basic anion exchange resin exhibited high selectivity and recovery for Re(VII) in a mixed system. © 2012 Society of Chemical Industry
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