Energies
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2016
·Vol. 9
·期 10
·764
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IF 2.077
Yuxue Zhou,Xiangdong Meng,Ling Tong,Xianghua Zeng,Xiaobing Chen
Highly hierarchical hollow bismuth tungstate (Bi2WO6) microspheres self-assembled by thin nanoplates have been fabricated via a facile template-free solvothermal route. The possible growth pattern and formation mechanism of hierarchical hollow Bi2WO6microspheres was investigated. The excellent visible-light-driven photocatalytic performance on rhodamine B (RhB) degradation was displayed by hierarchical hollow Bi2WO6microspheres. Such well-organized hierarchical hollow Bi2WO6microspheres show potential application in water treatment fields by full use of solar energy.Keywords:bismuth tungstate (Bi2WO6);semiconductor photocatalyst;visible-light-driven;water treatment
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
CERAMICS INTERNATIONAL
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2017
·
IF 2.986
Qi Zhang,Zan Dai,Gang Cheng,YunLing Liu,Rong Chen
We developed a facile in-situ growth method to construct amorphous-based Bi 2 S 3 /Bi 2 WO 6 heterostructures at room temperature. As demonstrated by HRTEM , XPS and EDX-mapping, amorphous state Bi 2 S 3 dispersed uniformly on the surface of crystalline Bi 2 WO 6 hollow spheres. The photocatalytic activities of prepared Bi 2 S 3 /Bi 2 WO 6 heterostructures were evaluated by the photodegradation of RhB and TC under visible light irradiation, indicating that the introduction of appropriate amorphous Bi 2 S 3 significantly improved the photocatalytic activity of Bi 2 WO 6 . The amorphous/crystalline contact in Bi 2 S 3 /Bi 2 WO 6 heterostructures played a crucial role in the enhancement of photocatalytic efficiency. Based on DRS, photoluminescence spectra, photocurrent intensity, electrochemical impedance spectroscopy and OCVD measurements, it was proposed that the enhanced performance could be ascribed to increased visible light utilization, promoted separation efficiency and prolonged life time of photogenerated electron-hole pairs by the introduction of amorphous Bi 2 S 3 . This work may provide new insights into the construction of amorphous-based composited heterostructures for improving photocatalytic activity.
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
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Dong Li,Siyu Tian,Qiuhua Qian,Caiyun Gao,Hongfang Shen,Fei Han
A nitrogen-doped tungsten oxide/BiVO4 (N-WO3/BiVO4) heterojunction structure was obtained utilizing ammonium paratungstate as the nitrogen source and Bi(NO3)3·5H2O as the bismuth source, exhibiting promising photoelectrochemical (PEC) performances and effectively obtaining a long photoresponse range into the visible light region. Notably, the UV–vis diffuse reflectance spectra of N-WO3/BiVO4 (566 nm, 2.19 eV) exhibited a notable red shift of the absorption edge compared to that of WO3/BiVO4 (516 nm, 2.47 eV). The N-WO3/BiVO4 photoanode demonstrated an excellent photocurrent density of 0.78 mA cm–2 at 0.68 V vs Ag/AgCl, which surpassed those of the WO3/BiVO4 (0.20 mA cm–2), pure WO3 (0.25 mA cm–2), and pure BiVO4 (0.03 mA cm–2) photoelectrodes. The improvement of the PEC performances was primarily due to the synergy of N doping and the involved heterojunction structure, suggesting that N doping increased the Vis-light response and the heterojunction structure promoted charge separation to improve the lifetime of photoinduced carriers.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2015
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IF 4.529
Lin Tang,Jiajia Wang,Guangming Zeng,Yani Liu,Yaocheng Deng,Yaoyu Zhou,Jing Tang,Jingjing Wang,Zhi Guo
Photocatalytic degradation is an alternative method to remove pharmaceutical compounds in water, however it is hard to achieve efficient rate because of the poor solubility of pharmaceutical compounds in water. This study investigated the photodegradation of norfloxacin in a nonionic surfactant Triton-X100 (TX100)/Bi 2 WO 6 dispersion under visible light irradiation (400–750 nm). It was found that the degradation of poorly soluble NOF can be strongly enhanced with the addition of TX100. TX100 was adsorbed strongly on Bi 2 WO 6 surface and accelerated NOF photodegradation at the critical micelle concentration (CMC = 0.25 mM). Higher TX100 concentration (>0.25 mM) lowered the degradation rate. In the presence of TX100, the degradation rate reached the maximum value when the pH value was 8.06. FTIR analyses demonstrated that the adsorbed NOF on the catalyst was completely degraded after 2 h irradiation. According to the intermediates identified by HPLC/MS/MS, three possible degradation pathways were proposed to include addition of hydroxyl radical to quinolone ring, elimination of piperazynilic ring in fluoroquinolone molecules, and replacement of F atoms on the aromatic ring by hydroxyl radicals.
研究领域:
环境科学
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化学工程
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药学
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Aobo Wan,Ziwei Ren,Yun He,Yizhen Zhang,Shunxi Zhang,Min Tu,Jianfen Li,Ming Qiu
Developing efficient and stable bismuth-based photoelectrodes is one of the key points for producing green hydrogen in photocatalytic fuel cell (PFC). In this study, a PFC system with two photoelectrodes (a MoS 2 /Bi 2 S 3 /Bi 2 WO 6 photoanode and a MoS 2 -Ni foam photocathode) was established for the first time. The ternary Bi 2 WO 6 -based composite photoanode was characterized as having not only the broad visible absorption region but also strong interactions between Bi 2 WO 6 , Bi 2 S 3 and MoS 2 . Additionally, the ternary composite photoanode exhibits excellent photoelectrochemical performance, achieving a photocurrent density reaches 3.2 mA/cm 2 , which is 17.78 times that of pure Bi 2 WO 6 . These observations can be explained by the creation of a type II/Z-scheme heterostructure of MoS 2 /Bi 2 S 3 /Bi 2 WO 6 photoanode. The Density Functional Theory (DFT) simulation proves the formation of Z-scheme heterojunction between MoS 2 and Bi 2 S 3 , which offers an opportunity for facilitating the mitigation and separation of photoexcited charge. The dual-photoelectrode PFC system demonstrated an effective hydrogen production capacity, exhibiting an output of 18.32 μmol/cm 2 /h. At the same time, the power density was 0.1325 mW/cm 2 , exhibiting a 1.41-fold increase relative to the MoS 2 /Bi 2 S 3 /Bi 2 WO 6 -Pt PFC system. This work offers a novel method for building effective PFC systems that co-produce electricity and hydrogen.
研究领域:
材料科学
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能源科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Yiling He,Jingcheng Wu,Xianmin Gong,Peichuan Mo,Tianmi Zhang,Quangang Chen,Yi He
Graphene oxide (GO)-based membranes have been widely used in the field of wastewater treatment by virtue of their unique separation mechanism, but their practical applications are severely constrained by the problems of selectivity, permeability and membrane contamination. In this study, a novel nanofiltration membrane structure was innovatively designed using a dual strategy of cross-linking and intercalation, with a view to enhancing the membrane separation performance and service life. Modification of GO nanosheets with PEI molecules (polyethyleneimine) at room temperature improved the hydrophilicity of the nanosheets and resulted in a hydrophilic membrane surface and smooth interlayer channels. A novel flower-like type 2 %SnS 2 /Bi 2 WO 6 p-n heterojunction synthesized via hydrothermal and ultrasonic-thermal treatment techniques was embedded in a composite membrane, and the M2 membrane with the best performance was prepared (2 %SnS 2 /Bi 2 WO 6 : PEI@GO = 0.6: 1). The M2 membrane has 12 times (120.9 L m −2 h −1 ) the pure water flux of the GO membrane and retains more than 99 % of the MB molecules. Owing to the stabilization of the membrane structure by chemical crosslinking, after up to 130 h of cycling experiments (photocatalytic cleaning of the membrane surface was performed every 10 h.), the rejection rate of MB was still higher than 98 %. Therefore, for the preparation of high-performance GO-based membranes, this synergistic strategy provides a simple and effective method.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Ziwen Qin,Zhengxu Jiao,Lu Liu,Guoli Liu,Ruihua Zhao,Jianping Du
An insight into synergism of heterojuctions and covalent inorganic/organic interfaces are of great significance for developing the highly-efficient photocatalyst of hydrogen production. Herein, the Z-scheme BWO/PDA materials were prepared by in-situ polymerization of dopamine (PDA) around bismuth tungstate (BWO) surface by ultrasonic method. As-prepared BWO/PDA was self-assembled orderly by BWO nanosheets coated with PDA, and it consists of lamella-assembled spherical particles with cavities. The strong covalent connection between PDA and BWO provides a fast channel for charge transfer, and the inherent conjugated structure of PDA improves the photoelectric and photocatalytic hydrogen production ability. The photocatalytic performance of BWO/PDA is further enhanced due to efficient carries separation resulting from multi crystal planes synergism, and optimal composite exhibits high ratio of hydrogen evolution (284 μmol g −1 h −1 ), which is 14 times higher than that of PDA-free bismuth tungstate. This finding implies PDA-modified bismuth tungstate is a promising low-cost photocatalyst for hydrogen evolution applied in clean energy field.
研究领域:
材料科学
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催化
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可再生能源
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纳米技术
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环境科学
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产品关联
DOI
高影响因子
CHEMOSPHERE
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2021
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IF 7.086
Xinghao Liu,Zhaoguang Yang,Ying Yang,Haipu Li
A novel carbon quantum dots (CQDs) sensitized 2D/2D carbon nitride nanosheets and bismuth tungstate composite (CQD-CNs/BWO) was successfully prepared via the facile hydrothermal method and used for the photocatalytic degradation of norfloxacin (NOR). During 120 min irradiation test, CQD-CNs/BWO exhibited 9 and 1.76 times higher photocatalytic activity than CNs and BWO, respectively. CQDs and constructed 2D/2D structure could not only improve the light harvesting but also promote the generation and separation of electron-holes. The existing inorganic ions in solution (e.g. bicarbonate ions, chlorine ions, and sulfate ions) could inhibit NOR degradation. Based on the electron spin resonance and free radicals inhibition tests, the holes and superoxide radicals rather than hydroxyl radicals were the main reactive species. The intermediates and possible pathways were proposed, and the antibacterial activity of the treated solution after the reaction was evaluated via bacteriostatic tests. The prepared composite material with high photocatalytic activity and stability is potentially effective for the degradation of antibiotics in wastewater.
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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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2025
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IF 4.1
Zhishan Liang,Yingming Ma,Ying He,Mengjiao Dai,Dongxue Han
Abnormal dopamine (DA) levels are implicated in numerous physiological disorders—including Parkinson's and Alzheimer's diseases—necessitating highly sensitive and selective analytical methods. Here we report a bismuth tungstate nanoparticle-modified glassy‑carbon electrode (Bi 2 WO 6 NPs/GCE) that enables chronoamperometric DA sensing with excellent electrocatalytic activity. Operating at an oxidation potential of +0.46 V, the sensor responds linearly to DA from 5 nM to 345 μM (R 2 = 0.9997) and offers a detection limit of 2.7 nM. To further miniaturise the platform, Bi 2 WO 6 NPs were drip-coated onto a laser-induced graphene pattern on eco-friendly polyvinyl chloride laser-induced graphene (PVC-LIG), producing a Bi 2 WO 6 NPs/Chip that functions inside a home-built integrated device. The chip requires only 70 μL electrolyte, operates at a lower potential (+0.22 V), and detects DA from 0.5 to 100 μM with a 14 nM detection limit. Both configurations exhibit excellent reproducibility (RSD < 1 %) and have been successfully applied to spike-and-recovery assays in human serum, demonstrating their promise for point-of-care DA monitoring.
研究领域:
分析化学
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纳米技术
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电化学
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生物传感器
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神经科学
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生物医学工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Qing Wang,Xingyue Qian,Hui Xu,Guangyu He,Haiqun Chen
Exploring effective approach to promote more comprehensive charge transfer and efficient spatial charge separation is considered to be a prospective strategy to reinforce photocatalytic degradation activity. Herein, the oxygen vacancy modified Bi 2 WO 6 /NH 2 -MIL-68(In) Z-scheme heterojunction photocatalyst was successfully fabricated via a facile solvothermal method. The chemical structure, morphology, and optical properties of the photocatalyst were characterized in detail. The optimized Bi 2 WO 6 /NH 2 -MIL-68(In) Z-scheme heterojunction displayed the maximum photocatalytic efficiency (84.3 %) for the degradation of levofloxacin (LEV), which was significantly higher than that of pure Bi 2 WO 6 (45.1 %), oxygen vacancy modified Bi 2 WO 6 (69.4 %), and NH 2 -MIL-68(In) (49.3 %). Importantly, the high-resolution mass spectrometry (HRMS), three-dimensional excitation-emission matrix (3D EEMs) fluorescence spectra, the photo-electrochemical and photo-luminescence measurement, radical trapping test, and electron spin resonance (ESR) technique were carried out to illuminate the probable degradation pathway and mechanism of the LEV. The improved photocatalytic efficiency can be ascribed to the synergetic effect between oxygen vacancy and the Z-scheme heterojunction, which can serve as trapping centers to enhance the generation of photoexcited electrons and accelerate the charge transfer. Meanwhile, the effects of pH, photocatalyst dose, LEV concentration and different kinds of harmful organic pollutants were systematically explored from the practical application. This study offers a novel perspective for the integration of defect engineering and Z-scheme heterojunction in efficient organic pollutants degradation.
研究领域:
环境科学
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材料化学
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光催化
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纳米技术
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污染物降解
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
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IF 4.439
Gaoyuan Long,Jiafeng Ding,Lihong Xie,Runze Sun,Mengxia Chen,Yanfang Zhou,Xiuying Huang,Gaorui Han,Yajun Li,Weirong Zhao
Chlorophenols (CPs) have been considered as a kind of priority environmental pollutants for their potential detrimental effects, and photocatalytic reduction dechlorination tend to be a promising approach to CPs’ removal. In this work, 2,4-dichlorophenol (2,4-DCP) was adopted as the model pollutant of CPs, and a simple mixing and heating method was employed to prepare graphitic carbon nitride and bismuth tungstate (g-C 3 N 4 /Bi 2 WO 6 ) binary photocatalysts. Under UV–vis light irradiation and anoxic atmosphere, the g-C 3 N 4 /Bi 2 WO 6 samples exhibited enhanced photocatalytic activities. The optimal dechlorination rate constant of 2,4-DCP over g-C 3 N 4 /Bi 2 WO 6 (weight ratio 3:7) was 1.13 h −1 , 7.6 and 8.9 times higher than that of pristine g-C 3 N 4 and Bi 2 WO 6 respectively. The enhanced activities originated from the effective suppression of charge recombination and extended spectrum absorption range. Kinetic studies revealed that the dechlorination processes followed the pseudo-first-order model. The photocatalytic mechanism of 2,4-DCP over g-C 3 N 4 /Bi 2 WO 6 was discussed in detail, and based on which, a mediator-free Z-scheme mechanism was proposed. This work extends the application range of g-C 3 N 4 /Bi 2 WO 6 photocatalyst and provides a new insight into environmental remediation.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
Green Energy & Environment
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2025
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IF 14.6
Yingxue Zhang,Wanjun Xu,Xiao Yang,Shihong Dong,Najun Li,Qingfeng Xu,Hua Li,Jianmei Lu,Dongyun Chen
Antibiotics, as an emerging pollutant due to their extensive use and difficulty in biodegradation, can cause harm to health through bioaccumulation. To address this, various photocatalysts have been developed for rapid antibiotic removal. However, their low concentrations limit mass transfer efficiency, resulting in suboptimal performance. Adsorption is crucial for enhancing photocatalytic efficiency. In this study, a series of binary heterojunction catalysts (x% BWO@STHP) were synthesized, consisting of Bi 2 WO 6 (BWO) grafted with sulfonated triptycene-based hypercrosslinked polymer (STHP). The high specific surface area of STHP, combined with π-π conjugation and ionic interactions with antibiotics, significantly enhances adsorption capacity. This facilitates effective contact between low-concentration pollutants in aqueous solutions and the active sites of the catalyst. The formation of a Z-scheme heterojunction between BWO and STHP facilitates photogenerated charge separation, and further significantly improves photocatalytic degradation performance. Specifically, the 20% BWO@STHP catalyst achieved rapid adsorption equilibrium for oxytetracycline (OTC), doxycycline (DOX), and tetracycline (TC) within 2 min and completely degraded them after 15 min of irradiation, compared to pristine BWO, the photocatalytic reaction rate constants are significantly increased, being 9.69 times higher for OTC and 13.45 times higher for DOX. The catalyst exhibits excellent reusability and holds promising potential for practical applications.
研究领域:
环境科学
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高分子化学
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催化
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材料科学
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水处理技术
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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）