APPLIED SURFACE SCIENCE
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2018
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IF 4.439
Yuxue Zhou,Pengfei Lv,Wei Zhang,Xiangdong Meng,Hui He,Xianghua Zeng,Xiaoshuang Shen
Pristine Bi 2 WO 6 hollow microspheres have been fabricated in ethylene glycol-water system with CTAB as crystal growth director for the first time, hybrid Au- Bi 2 WO 6 hollow microspheres was also obtained by in situ decoration of Au nanoparticles, the formation mechanisms were explored. Their photocatalytic activities on photo-reduction of Cr(VI) and photo-degradation of phenol in aqueous solution were investigated under visible light irradiation. Hybrid Au- Bi 2 WO 6 hollow microspheres displayed the highest photocatalytic activity, exhibiting a nearly complete reduction of Cr(VI) to Cr(III) within only 20 min. The excellent photocatalytic activities of heterogeneous Au-Bi 2 WO 6 hollow microspheres can be induced by the increased light harvesting efficiency (due to light multi-scattering effect of hollow architecture), high separation of photogenerated electron-hole pairs caused by electron trapping effect and surface plasmon resonance (SPR) effect of Au nanoparticles.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
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IF 9.5
Han Liu,Jun Zhang,Quanlong Xu,Hong Tao,Tingmin Di,Quanrong Deng,Shenggao Wang
Artificial photosynthesis offers a viable strategy for sustainable and environmentally friendly H2O2 production. However, conventional inorganic semiconductor photocatalysts often face limitations such as restricted light absorption, inadequate redox ability, small specific surface area and poor stability, which greatly restrict their practical applications. Herein, an innovative inorganic/organic S-scheme heterojunction is fabricated by an electrostatic self-assembling method. The optimized BT-12 composite demonstrates a significantly enhanced photocatalytic H2O2 production rate of 723 μmol L−1, surpassing the rates achieved by pure Bi2WO6 and TpPa-Cl-COF by factors of 10 and 2.9, respectively. This improvement can be attributed to the synergistic effects of enhanced light absorption, increased specific surface area, and effective separation of charge carriers and redox active sites, as well as the strong redox ability induced by the S-scheme heterojunction. Density functional theory (DFT) calculations along with X-ray photoelectron spectroscopy (XPS) measurements and electron paramagnetic resonance (EPR) characterization confirm the step-by-step charge transfer pathway. The active species trapping experiments validate that H2O2 is predominantly produced by a two-step one-electron process. This work highlights an innovative and promising strategy for constructing a highly efficient photocatalytic system based on inorganic/organic heterojunctions.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CATALYSIS TODAY
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2016
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IF 4.312
Dongting Yue,Zichen Zhang,Zheyi Tian,Taiyang Zhang,Miao Kan,Xufang Qian,Yixin Zhao
The Mo 3 S 13 2− /Bi 2 WO 6 nanocomposites were facilely fabricated by depositing [Mo 3 S 13 ] 2− clusters onto the hydrothermally prepared Bi 2 WO 6 nanoparticles . This novel Mo 3 S 13 2− /Bi 2 WO 6 nanocomposite exhibited unprecedented visible light photocatalytic activities. The deposited [Mo 3 S 13 ] 2− clusters enhanced the photocatalytic activity of Bi 2 WO 6 by promoting the migration of photoinduced charges, which restrained the recombination of photogenerated hole–electron (h + /e − ) pairs on the surface of Bi 2 WO 6 . Furthermore, the high photocatalytic stability and recyclability of Mo 3 S 13 2− /Bi 2 WO 6 nanocomposite enable it to be a promising candidate for the environmental remediation especially in wastewater treatment . In all, [Mo 3 S 13 ] 2− clusters with advantages of low cost and earth-abundance are great potential as co-catalyst for photocatalysts.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Crystals
·
2023
·Vol. 13
·期 11
·1531
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IF 2.7
Li Wang,Junbo Wang,Yanfei Fei,Heping Cheng,Hua Pan,Chunfeng Wu
Novel Ag3PO4/Bi2WO6catalysts with enhanced visible-light performance were synthesized using a hydrothermal method and characterized to investigate their morphology, microscopic structure, and binding energies. Photoluminescence spectrum (PL) and electrochemical impedance spectroscopy (EIS) data demonstrate that the formed Ag3PO4/Bi2WO6heterojunction effectively promotes hole (h+)–electron (e−) separation and transfer efficiency, resulting in the enhancement of photocatalytic activity. Ag3PO4/Bi2WO6displays higher photocatalytic activity than pure Bi2WO6or Ag3PO4alone. Photogenerated holes (h+), ·O2−, and ·OH were found to be the main active species for the degradation of malachite green (MG), methylene blue (MB), and Rhodamine B (RhB). The DFT calculation explains the photostability of Ag3PO4/Bi2WO6from the perspective of electronic structure. The bandgap of Ag3PO4/Bi2WO6between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) is 1.41 eV, compared with that of Ag3PO4at 0.91 eV and Bi2WO6at 2.59 eV. Ag–O–Bi hybridization and the wide HOMO–LUMO bandgap lead to difficulty in electron transfer. As a consequence, Ag+is difficult to obtain electrons and difficult to convert into Ag0, which makes the catalyst stable.Keywords:Ag3PO4;Bi2WO6;heterojunction;photocatalyst;visible-light-driven
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
IONICS
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2023
·Vol. 29
·期 3
·1245-1254
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IF 2.8
Wang Kunjie,Han Sha,Liang Lei,Li Hongxia,Niu Xiaohui,Zhang Deyi,Fan Haiyan,Liu Xiaoyu
A ternary composite material containing TiO 2 , Bi 2 WO 6 , and carbon quantum dots (CQDs) was synthesized in this work. Herein, CQDs were derived from olive leaves using reflux method, and TiO 2 was loaded through hydrothermal treatment. The as-prepared composite (Bi 2 WO 6 /CQDs/TiO 2 ) showed excellent photocatalytic properties. The structure, morphology, and chemical composition of Bi 2 WO 6 /CQDs/TiO 2 were characterized using XRD, SEM, TEM, and XPS. The photocatalytic performance of the composites showed it depends on the loading rate of CQDs. The highest degradation rate of RhB (92%) was achieved at 0.5% for CQDs. UV–vis DRS, photocurrent, and PL analysis results showed that, compared to Bi 2 WO 6 and CQDs/TiO 2 binary composite, the ternary composite Bi 2 WO 6 /CQDs/TiO 2 -0.5 exhibited better visible light response, higher photogenerated carrier separation efficiency, and consequently superior photocatalytic degradation performance.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
MATERIALS CHARACTERIZATION
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2020
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IF 3.562
Xiaoxia Guo,Dan Wu,Xia Long,Zihan Zhang,Fenglin Wang,Guanghua Ai,Xiaohe Liu
The nanosheet-assembled Bi 2 WO 6 microspheres could be successfully synthesized in large quantities by a facile hydrothermal strategy in the presence of surfactant hexadecyl trimethyl ammonium bromide (CTAB) and polyvinylpyrrolidone (PVP) under mild conditions. The morphology and size of as-prepared Bi 2 WO 6 could be readily controlled by adjusting the synthetic parameters such as hydrothermal time. The probable formation mechanism of nanosheet-assembled Bi 2 WO 6 microspheres was discussed in detail. The hierarchical nanosheet-assembled microspheres could be constructed by orderly arranged nanosheets. The photocatalytic activity of the nanosheet-assembled Bi 2 WO 6 microspheres was evaluated by degrading rhodamine B (RhB) under irradiation of visible light. The brilliant photodegradation efficiency is about 98% under visible light irradiation for 50 min. The results suggest that the as-prepared Bi 2 WO 6 microspheres have good prospects as the photocatalyst for the removal of organic pollutants .
研究领域:
材料科学
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环境科学
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DOI
高影响因子
KEY ENGINEERING MATERIALS
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2012
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IF 0
Hai Feng Chen,Ting Yan
Using Bi(NO3)3•5H2O, Na2WO4•2H2O and Ti• (OC4H9)4 as the main raw materials, different alcohol solvent as medium, hexamethylene tetramine as sink set agent, tungsten bismuth and titanium dioxide composite powder were prepared by hydrothermal synthesis. It was characterized by XRD and DRS. The methyl orange imitated sewage, we study the impacts of calcinations’ temperature, catalyst amount, concentration, illumination time and pH on photocatalytic performance of Bi2WO6/TiO2 samples under visible light. The results showed that calcinations’ temperature 400 oC was the best, because the forbidden band gap decreased with temperature increased, but phase transition or decomposition exothermic of the samples would occurre at higher than 400 degree. The Bi2WO6/TiO2 prepared under acidic condition had only 2.41 eV as the smallest forbidden band gap of the samples.
研究领域:
材料科学
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环境科学
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DOI
CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Jingmei Li,Luyin Zhao,Chunjiao Hu,Ling Zhang
The escalation of medication resistance in pathogenic bacteria has resulted in significant damage to public health and safety, as bacterial and fungal illnesses proliferate. Additionally, pathogenic bacteria disseminate via water resources, leading to water contamination and adversely impacting the quality of the living environment. Consequently, the creation of an efficient antibacterial material has emerged as a focal point of study. Photocatalysis, as an innovative, environmentally friendly, and effective technique, has been extensively used in degrading and antibacterial domains.For the first time, Bi 2 WO 6 /Bi 4 O 5 I 2 composites with molar ratios of 1:1, 1:2, 1:3, and 1:4 were produced using the water bath-calcination technique including bismuth nitrate pentahydrate, sodium tungstate dihydrate, and potassium iodide, and their photocatalytic antibacterial characteristics were examined. Their characterization was conducted using XRD, XPS, SEM, FT-IR, and UV techniques. The antibacterial efficacy was evaluated using a low-power 35 W LED light irradiation dilution coated plate technique. The experimental findings demonstrated that, in the presence of 35w LED lighting, the antibacterial rate against E.coli , Bacillus subtilis , and P.aeruginosa reached 100 % in 10 min at a concentration of 1000 mg/L of BWOI-3 composite material, and the antibacterial efficiency against S. aureus reached 100 % in 5 min. Within 50 min, the antibacterial efficacy against Candida albicans was 100 %. The Bi 2 WO 6 /Bi 4 O 5 I 2 compound has shown exceptional broad-spectrum antibacterial efficacy.
研究领域:
材料科学
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微生物学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2014
·Vol. 90
·期 5
·947-954
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IF 2.494
Yunfang Chen,Jianzhang Fang,Shaoyou Lu,Weicheng Xu,Zhang Liu,Xiaoxin Xu,Zhanqiang Fang
BACKGROUND Chlorophenols (CPs) are organic pollutants and are most widespread in the aqueous environment. Photocatalytic degradation of organic compounds has been extensively studied as a potential technology for water treatment. In this study, BiOI/Bi 2 WO 6 hierarchical heterostructure with flower-like morphology was synthesized by a facile method using a one-step hydrothermal approach. The catalytic activities of the photocatalysts were tested by the degradation of 2,4-DCP under visible-light irradiation and the photocatalysis mechanism of BiOI/Bi 2 WO 6 was investigated. RESULTS The as-prepared catalysts exhibited the characteristic peaks of BiOI and Bi 2 WO 6 . The photocatalytic activities, which were evaluated by degradation of 2,4-DCP under visible light irradiation, were enhanced significantly by BiOI/Bi 2 WO 6 hierarchical heterostructures with different molar ratios of BiOI to Bi 2 WO 6 . CONCLUSIONS BiOI/Bi 2 WO 6 hierarchical heterostructure significantly enhanced the photocatalytic activity. The optimum percentage of BiOI was 10%. The optimal initial pH value of 2,4-DCP was determined to be pH 8. The possible reaction mechanisms were discussed on the basis of the calculated energy band positions. © 2014 Society of Chemical Industry
研究领域:
材料科学
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环境科学
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2013
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IF 2.072
De-Kun Ma,Shu-Mei Zhou,Xia Hu,Qiao-Rong Jiang,Shao-Ming Huang
We present here a facile one-pot surfactant-free solvothermal route to synthesize hierarchical BiOI microspheres assembled from nanosheets at 120 °C for 16 h. The as-synthesized BiOI microspheres could be topochemically converted into hollow hierarchical Bi 2 WO 6 ones built by nanoplates for the first time under hydrothermal condition because of the analogies of crystal structures. The transformation process of hierarchical BiOI microspheres to hollow Bi 2 WO 6 ones was surveyed through XRD analyses and FE-SEM observations of the intermediates at different reaction stages. Rhodamine B (RhB) was selected as pollutant model and visible-light-driven photocatalytic activities of hierarchical BiOI and Bi 2 WO 6 microspheres under the same measurement conditions were comparatively studied. As a result, the photocatalytic activities of BiOI obviously outshone Bi 2 WO 6 . The present study not only develops a new method for fabricating hierarchical architectures but also provides some useful information on relative visible-light-responding photocatalytic activity of hierarchical BiOI and Bi 2 WO 6 microspheres.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 4
·1-19
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IF 2.8
Yao Bingdong,Zheng Guangwei,Luan Yina,Wang Lingxu,Xing Xuemin,Wang Yangyang,Liu Yan,He Jingxian,Zhang Fengqing
The morphology-controlled synthesis of nanostructured photocatalysts by an environmentally friendly and low-cost method provides a feasible way to realize practical applications of photocatalysts. Herein, Bi 2 WO 6 (BWO) nanophotocatalysts with mulberry shape, sheet-like, and round-cake morphologies have been successfully synthesized through a highly facile solvothermal process by simply adjusting the solvothermal temperature or utilizing selective addition of ethylene glycol as an orientation agent without using strong acids and bases and/or hazardous chemicals. The ratio of ethylene glycol and glacial acetic acid can affect the morphology and oxygen vacancy content of BWO, thereby influencing the photocatalytic performance. The photocatalytic activity of the as-prepared samples was evaluated by degradation of rhodamine B (RhB) and tetracycline under visible-light irradiation. The results indicated that all the BWO samples exhibited morphology-associated photocatalytic activity, and the sheet-like structure of BWO obtained via solvothermal treatment at 120 °C with ethylene glycol and glacial acetic acid ratio of 1:3 achieved the maximum specific surface area and possessed abundant oxygen vacancies, exhibiting outstanding photocatalytic activity for degradation of RhB and tetracycline. The degradation rate of RhB reached 100% within 20 min. To the best of our knowledge, this value is one of the most remarkable values for pristine BWO photocatalysts. Radical capture experiments demonstrated that hydroxyl radicals (·OH) play major roles compared with electrons (e − ) and holes (h + ) in the photocatalytic degradation process. A possible mechanism for the photocatalytic degradation of pollutants was proposed to better understand the reaction process. We believe that the more economical, efficient and greener methodology can provide guidance to develop highly efficient photocatalysts with favourable morphology and structure.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
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2023
·Vol. 70
·期 7
·1481-1492
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IF 1.8
Jia-Rong Xue,Rong-Chao Xue,Pei-Yao Chen,Yong Wang,Li-Ping Yu
In this study, a hydrostable Z-scheme Ag/CsPbBr 3 /Bi 2 WO 6 photocatalyst was designed and fabricated for the degradation of Rhodamine B (RhB). The structural instability of CsPbX 3 perovskites in water is one of the main obstacles that restrict their practical application in photocatalytic wastewater treatment. The photocatalyst was prepared in three steps: passivation of CsPbBr 3 nanocrystals (NCs) with 3-mercaptopropionic acid (MPA), construction of a heterojunction between MPA-passivated CsPbBr 3 NCs and Bi 2 WO 6 ultrathin nanosheets, and doping Ag nanoparticles as charge mediators in the heterojunction. The as-obtained 5%Ag/20%CsPbBr 3 /Bi 2 WO 6 exhibits good stability and excellent photocatalytic activity. The degradation rate is 93.9% in 120 min, which is 4.41 times than that of Bi 2 WO 6 .
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）