JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2026
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IF 9.2
Xingzhi Jin,Jing Guo,Minghui Gao,Ting Chen,Chuang Wang,Shengyao Wang,Peng Cai,Hao Li,Haotian Liu,Hao Chen,Xing Ding
Traditional Fenton reaction is limited by strict pH and iron sludge. integrating photo-Fenton enables operation under mild conditions. We report a one-step hydrothermal synthesis of Fe-modified Bi 2 WO 6 (Fe-BWO) to create an efficient photo-Fenton synergistic system for ciprofloxacin (CIP) removal under visible light. The Fe-BWO system achieved 83.7 % CIP degradation in 1 h, surpassing standalone photocatalysis and homogeneous Fenton. The degradation rate was 6 times that of photocatalysis and 1.5 times that of homogeneous Fenton. Crucially, the system exhibited excellent stability, wide pH applicability, and low H 2 O 2 consumption OH, and ·O 2 − were confirmed as major reactive species. Mechanistic studies indicate that the narrowed band gap promotes electron migration, while H 2 O 2 -induced surface microenvironment variation (attributed to Bi (3−x)+ electron redistribution) is vital for molecular oxygen activation. This work offers novel insights into H2O2 activation and the impact of surface microenvironments in photo-Fenton processes.
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APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Yajing Huang,Dingren Ma,Jing Cao,Zhuoyun Tang,Lingling Hu,Yexing Zhang,Huinan Zhao,Dehua Xia,Chun He,Po Keung Wong
A simple hydrothermal method was applied to synthesize a 2D/2D g-C 3 N 4 /Bi 2 WO 6 (CN/BWO) composite photocatalyst for the photocatalytic removal of gaseous methyl mercaptan (CH 3 SH). The layered structure of CN/BWO and the C-O-Bi bonds at the interlayer interface were confirmed by thorough characterization techniques. The C-O-Bi bonds were demonstrated to reduce interlayer charge transfer resistance and inhibit photogenerated electron/hole pairs recombination. Therefore, 0.1-CN/BWO exhibited the highest photocatalytic efficiency for CH 3 SH removal, which was 1.4 times higher than 0.1-CN/BWONF with nanoflower structure, and 5.1 and 1.9 times higher than that of pure g-C 3 N 4 and Bi 2 WO 6 . The photocatalytic oxidation pathway and mechanism for CH 3 SH removal were revealed based on reactive species trapping, electron spin resonance (ESR), and in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) tests. This work provides new insights into the design of photocatalysts with high photocatalytic performance and stability for the removal of volatile organic compounds (VOCs).
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2023
·Vol. 25
·期 5
·4332-4339
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IF 3.3
Xiao Miao,Ling Zhao,Guina Ren,Yunlong Pang,Hui Xin,Bo Ge,Cancan Liu
Environmental pollution and the shortage of drinking water are the challenges that mankind is facing. Solar interface evaporation technology has been demonstrated as an important method for producing clean water, but its application to sewage still faces problems, mainly manifested in solubility and oily pollutants. Therefore, an evaporator device contains a superhydrophobic Bi2WO6 felt floating layer, a filter paper hydrophilic layer, and a copper foam/CuO photothermal layer, of which the water contact angle of the superhydrophobic felt can reach 159°. The floating layer not only has the ability to adsorb n-hexane but the Rh B degradation can also be realized under indoor/outdoor light conditions. The carrier life of Bi2WO6 is 28.8 ns. A copper foam/CuO photothermal layer prepared through a low-temperature treatment is combined with the floating and hydrophilic layer to obtain an evaporation rate of 1.53 kg m−2 h−1.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
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IF 9.136
Zihan Kang,Mengshi Chen,Enzhu Lin,Jiang Wu,Kanghui Ke,Ni Qin,Dinghua Bao
Carbon-based composites with high activity and selectivity have broad prospects in the field of synthesis and catalysis. This work describes the controllable encapsulation of Bi 2 WO 6 (BWO) piezocatalysts with the mixture of derivatives and frameworks obtained by calcining MIL-53 metal–organic frameworks (MOFs). The mesoporous carbon and multi-functional groups of C/Fe 3 O 4 derived from the pyrolysis of MIL-53(Fe) can mediate the magnetic recyclability of catalysts and act as electron transfer units. Due to the high thermal stability, MIL-53(Al) mixed together still retains the frameworks and shows ameliorated hydrophobicity induced by porous carbon , which ensures the continuous generation of active radicals. The MOFs-assembled BWO nanoflowers possess the characteristics of complete adsorption-release and piezocatalytic degradation of organic pollutants, and the piezocatalytic degradation efficiency reaches 3.7 times higher than that of pure BWO nanoflowers. We also proposed a magnetic modulation method to obtain efficient macroporous MOFs/BWO-PVDF membranes. The magnetic composite powders can be highly exposed to the membrane surface to form more active sites for piezocatalytic reaction, which can overcome the problem of catalysts embedding in the membrane. This work not only proposes a novel way of synthesizing carbon composite piezocatalysts, but also provides the possibility to obtain more convenient, recyclable and high-performance piezocatalytic membrane, which is of great significance to explore the extensive application of piezocatalyst in sewage treatment.
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FlatChem
·
2022
·
IF 5.829
Shuting Hu,Yuheng Liang,Fuming Chen,Guannan He,Yinzhen Wang,Wei Li,Qinyu He
It is important for organic pollutants to be completely degraded without intermediates. In this work, a novel wide-spectrum-response oxygen-rich double direct Z-scheme heterojunction-structured photocatalyst, g-C 3 N 4 (precursor: urea, CN-U)/g-C 3 N 4 (precursor: thiourea, CN-T)/Bi 2 WO 6 (UTB), was prepared. The ternary system was confirmed by structural analysis and surface and morphological studies. The photocatalytic performances of the synthesized catalysts were estimated by photodegrading rhodamine B (RhB) solution. A more than 92 % mineralization and improved photocatalytic activity were achieved. UTB showed an outstanding photocatalytic performance for RhB degradation compared to CN-T, CN-U, Bi 2 WO 6 , and their binary nanocomposites.The improved photocatalytic properties and n more than 92 % mineralization were attributed to the double direct Z-scheme and oxygen vacancies, which maintained the outstanding redox capability of the electrons, expanded the range of light absorption, and facilitated the separation of photogenerated carriers. This study has demonstrated the prospect in obtaining a double Z-scheme structured photocatalysts with simultaneously high redox potential and narrow E g . This work has also offered a new strategy for fabricating low-consumption and efficient photocatalysts that mineralize more than 92 % of organic pollutants without existing intermediates.
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Fanyong Yan,Yao Wang,Chunhui Yi,Jinxia Xu,Bowei Wang,Ran Ma,Ming Xu
The composition of composite photocatalysts with both broad spectral response and efficacious separation of photoinduced carriers were essential. The CDs were installed on the surface of the three-dimensional hollow microsphere nanophotocatalyst Bi 2 WO 6 by the hydrothermal approach. Crystal structure, morphology and composition revealed the synthesis of the composite catalyst. The higher photocatalytic capability of 0.5% CDs/Cl–Bi 2 WO 6 (0.0317 min −1 ) was observed in the degradation procedure, explained that the doping of Cl and the presence of CDs remarkably strengthened the visible light capture and depressed the rate of electron-hole pair complexation. Notably, scavenger-quenching assays results verified that activities of h + , •OH and •O 2 ‾ were the primary actors in the degradation procedure. Ultimately, the degradation mechanism of a feasible TCH was submitted. This study presented a novel concept for the exploitation of composite nanophotocatalysts for the effective degradation of organic pollutants.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Rui Zhang,Jiacheng Jiang,Kunlin Zeng
Photocatalysts usually exist in powder form, which limits their practical application in photocatalytic degradation of antibiotics in wastewater. To solve this problem. Here, we report the construction of Z-scheme Bi 2 WO 6 /g-C 3 N 4 on activated carbon fiber membrane (ACF) as a thin-film photocatalyst. The catalyst was characterized by XRD , SEM, XPS and other means. Chlortetracycline was used as a model pollutant to study the photocatalytic activity of the sample. According to the results of XPS and XRD, the composite material was successfully prepared. Ultraviolet diffuse reflectance characterization showed that the edge and intensity of the absorption band of the composite material were enhanced. The photodegradation experiment of chlortetracycline shows that 10% Bi 2 WO 6 /g-C 3 N 4 /ACF (area: 4 × 4 cm 2 ) has the best photocatalytic activity. Cycling experiments have proved that the 10% Bi 2 WO 6 /g-C 3 N 4 /ACF composite material has a stable degradation ability during the photodegradation process. Therefore, Bi 2 WO 6 /g-C 3 N 4 /ACF can be used as a recyclable, large surface area photocatalyst to eliminate water Antibiotics in the environment.
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Crystals
·
2023
·Vol. 14
·期 1
·55
·
IF 2.7
Jingfei Luan,Liang Hao,Ye Yao,Yichun Wang,Guangmin Yang,Jun Li
A groundbreaking photocatalytic nanomaterial, Dy2NdSbO7, was fabricated smoothly using the hydrothermal synthesis technique for the first time. Apart from that, Dy2NdSbO7/Bi2WO6heterojunction photocatalyst (DBHP) was initially fabricated using the solvothermal fabrication technique. X-ray diffractometer, Fourier-transform infrared spectrometer, Raman spectrometer, UV-visible spectrophotometer, X-ray photoelectron spectrometer, inductively coupled plasma optical emission spectrometer, transmission electron microscope, and X-ray energy dispersive spectroscopy have been applied to evaluate and investigate the thetastructure, morphology, and physicochemical properties of synthesized samples. The results confirmed that the pyrochlore-type crystal structures of Dy2NdSbO7belonged to the Fd3m space group with the cubic crystal system and the β-pyrochlore-type crystal structures of Bi2WO6which belonged to the Pca21 space group with orthorhombic crystal system. Under visible light exposure for 155 min (VLP-155min) using DBHP in the capacity of the photocatalytic nanomaterial, the removal efficiency of chlorpyrifos (CPS) saturation reached 100%. Comparison of CPS removal efficiency after VLP-155min revealed that DBHP exhibited higher removal efficiency than Dy2NdSbO7, Bi2WO6, or N-doped TiO2photocatalyst, with removal efficiency 1.15 times, 1.23 times, or 2.55 times higher, respectively. Furthermore, the oxidizing capability of free radicals was investigated using trapping agents. Results demonstrated that superoxide anions exhibited the strongest oxidative capability, followed by hydroxyl radicals and holes. The results presented in this study lay a robust groundwork for future investigations and advancements in the field of highly efficient heterostructure material. These findings have significant implications for the development of environmental remediation strategies and provide valuable insights into sustainable solutions for addressing CPS contamination.Keywords:Dy2NdSbO7;Dy2NdSbO7/Bi2WO6heterojunction photocatalyst;chlorpyrifos;visible light irradiation;photocatalytic activity;degradation pathway;degradation mechanism
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MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Yunxia Hou,Liangliang Zhu,Hongshun Hao,Zuowei Zhang,Chao Ding,Gongliang Zhang,Jingran Bi,Shuang Yan,Guishan Liu,Hongman Hou
In this work, layer-by-layer self-assembly method was used to construct the working electrode of the photoelectrochemical (PEC) aptamer sensor. Rare-earth doped Bi 2 WO 6 (BWO-1) and Ag 2 S are combined as highly efficient photoactive material to reduce the recombination rate of electron-hole pairs and enhance the photocurrent responsiveness under visible light. The PEC aptamer sensor, with BWO-1 concentration of 12 mg/mL, AgNO 3 concentration of 0.14 mol/L, ascorbic acid (AA) concentration of 0.13 mol/L, pH value of 7.4, aptamer concentration of 2 μmol/L, and incubation time of 50 min, had an optimal photocurrent responsiveness. The developed method showed a wide linear range from 3.2 × 10 2 CFU/mL to 3.2 × 10 8 CFU/mL. The detection limit was 40 CFU/mL. The constructed PEC aptamer sensor exhibited good detection specificity, stability and reproducibility for Vibrio parahaemolyticus and provided a simple, low-cost and rapid detection strategy for prevention and control of foodborne diseases. This method could be promising for the rapid detection of other food-borne pathogenic bacteria in the food.
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Advanced Materials Interfaces
·
2021
·Vol. 8
·期 7
·2002131
·
IF 6.147
Dayong He,Yuying Ma,Rui Zhao,Ju Qiu,Bolun Sun,Hao Wang,Mei Yang,Xiaoteng Jia,Xiang Li,Yongxin Li,Xiaofeng Lu,Ce Wang
Faced with the presence of radiation sources in many different areas, researchers are beginning to focus on the development of personal protective equipment. The design and manufacture of lightweight, lead-free, and flexible X-ray shielding materials have recently become a challenge in materials science, whereas, high-Z materials, which are essential raw materials for high-performance X-ray protective fillers, are non-renewable, and their exploitation and utilization usually require long-term planning. In this study, a new route is demonstrated to the preparation of multifunctional polymer/high-Z material nanofibrous membrane through electrospinning and subsequent solvothermal processes. The resultant Bi 2 WO 6 /WO 3 /polyacrylonitrile hybrid nanofibrous membrane possesses a remarkable X-ray attenuating property with an attenuation rate of 90.10% at 30 keV and a mass attenuation coefficient of 2.97 cm 2 g −1 at 83 keV. In addition, the freestanding hybrid nanofibrous membrane also possesses excellent photocatalytic activities for the degrading of cationic water pollutants, showing promising potential in industrial wastewater treatment, and providing a new strategy for the design and applications of multifunctional and recyclable shielding materials.
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APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Yanchun Ge,Quanquan Zhang,Changjun Yang,Bingguang Zhang,Kejian Deng
Selective photocatalytic oxidation of glucose to high-value chemicals in aqueous media using atmospheric oxygen as oxidant and solar light as driving force is a greatly attractive topic. Herein, Bi 2 WO 6 /CoPz (cobalt tetra(2,3-bis(butylthio)maleonitrile) porphyrazine) composite was served as a visible-light photocatalyst towards selective oxidation of glucose to high-value arabinose and formic acid in aqueous media, which was performed under visible light (λ ≥ 420 nm) irradiation using atmospheric oxygen as oxidant. The reactive parameters for glucose oxidation, such as light intensity, CoPz content, glucose concentration and active species, were studied. The highest activity for Bi 2 WO 6 /CoPz composite was obtained when the CoPz content was 0.25 %. Under the optimum reaction conditions, 96.8 % of total selectivity towards arabinose and formic acid at 45.3 % of glucose conversion was obtained after reacting 3 h. The critical role of CoPz and the rationale behind the high photocatalytic performance for Bi 2 WO 6 /CoPz composite were further investigated using various techniques.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Jiafeng Jin,Jinsheng Sun,Kaihe Lv,Xuan Guo,Qilin Hou,Jingping Liu,Jintang Wang,Yingrui Bai,Xianbin Huang
The introduction of oxygen-defects has been a versatile strategy to enhance photocatalysis efficiency. In this work, a 2D/3D Bi/BiO 2-x /Bi 2 WO 6 heterojunction photocatalyst with rich oxygen-defective was in sequence prepared through a facile solvothermal method , which displays favorable photocatalytic activity towards organic contaminants under visible-NIR light irradiation . The enhancement in photocatalytic performance can be attributed to the synergistic effect between oxygen-vacancy-rich heterojunction and the localized surface plasmon resonance induced by metallic Bi. The functional group interaction, surface morphology , crystal structure, element composition , and tuned bandgap were investigated by FT-IR, SEM, Raman shift, ICP-MS, and XPS technique. The spectrum response performance of the photocatalyst was verified by UV–visible DRS analysis. Results of photodegradation experiments toward organic contaminants showed that the prepared photocatalyst can degrade 90% of phenol in 20 mins under visible-NIR light irradiation, both Z-scheme heterojunction and the introduction of Bi metal contribute to the enhancement in the photocatalytic activity. The results of the DFT calculation suggest that the valence band-edge hybridization within BiO 2-x and Bi 2 WO 6 can effectively enhance the photocatalytic performance by increasing the migration efficiencies of electron-hole pairs. Moreover, a possible mechanism was proposed on the results of EIS, ESR and GC–MS tests. This work offers a novel insight for synthesizing efficient visible-NIR light photocatalysis by activating the semiconductors with Bi metal.
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