Article
Engineering, Environmental
Tamer M. Khedr, Kunlei Wang, Damian Kowalski, Said M. El-Sheikh, Hany M. Abdeldayem, Bunsho Ohtani, Ewa Kowalska
Summary: This article summarizes the principles, recent developments, and practical applications of Bi2WO6-based Z-scheme photocatalytic systems. It focuses on the types, mechanisms, and importance of constructing Z-scheme photocatalysts. Additionally, the differences between different types of photocatalysts and the role of unique structures in improving photocatalytic activity are discussed.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Jianrui Cao, Suyu Zhou, Junhao Cai, Junhe Han, Junhui Liu, Ruoping Li, Mingju Huang
Summary: This study fabricated a Z-Scheme heterojunction of C3N4/Ti3C2/CdS to enhance the photocatalytic production of hydrogen peroxide. The addition of Ti3C2 and CdS improved the absorption efficiency of C3N4 under visible light and enhanced electron transfer ability. The ternary photocatalyst showed significantly higher H2O2 yield than pristine C3N4 and maintained good stability after multiple cycles.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Jian Yang, Lei Yang, Ming Fang, Lei Li, Fan Fu, Hao Xu, Minggao Li, Ximei Fan
Summary: Constructing Z-scheme heterojunction photocatalysts is a promising strategy for decomposing VOCs, and in this study, a compact and homogenous BiOCl/Bi2WO6 heterojunction photocatalyst was successfully synthesized via a one-pot hydrothermal method. The integrated structure facilitated efficient separation of photogenerated carriers and the generation of active species for VOC degradation. The optimized BiOCl/Bi2WO6 photocatalyst exhibited almost 100% toluene degradation and excellent durability. The photocatalytic mechanism and intermediate products were also investigated, providing insights for efficient VOC degradation under sunlight.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Wang Cao, Caiyun Jiang, Chen Chen, HaiFei Zhou, Yuping Wang
Summary: The Z-scheme CdS/Bi4O5Br2 heterostructure was successfully synthesized and its construction was verified through various tests. The heterojunction interface formed by CdS nanospheres on Bi4O5Br2 nanosheets improved the transfer of photogenerated electron-hole pairs, enhancing the photocatalytic performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Dandan Lv, Tianyu Hu, Li Li, Yin Liu, Jiaqi Hou, Yan Yu, Yanzhen Cao, Fengyan Ma
Summary: In this paper, CdS QDs@ZrO2-TiO2 hollow spherical composites with double Z-scheme heterostructure modified by CdS QDs were prepared. The composites exhibited a hollow sphere structure with uniform size and orderly arrangement. The double Z-scheme heterojunction formed between CdS QDs, ZrO2, and TiO2 in the composite can optimize the charge transfer path and improve the charge separation efficiency. The CdS QDs@ZrO2-TiO2 composites showed superior photocatalytic performance compared to other systems, with high photo catalytic degradation rate and photocatalytic hydrogen production rate under simulated sunlight.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Yongchao Bao, Junkai Pan, Hui Wu, Zishang Zhang, Yujing Li, Zilong Wang, Tingting Hui, Bo Yang, Jianan Li, Haotian Hu, Jinli Jiang, Juan Liu
Summary: In this work, 2D/2D/2D Bi2WO6/Ti3C2/SnNb2O6 catalysts were successfully constructed via an anaerobic hydrothermal method. The composites significantly improved the photodegradation efficiency of tetracycline hydrochloride due to the high redox ability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Guojun Li, Zheng Lian, Zhengwei Wan, Zhinian Liu, Jingwen Qian, Yue Deng, Shule Zhang, Qin Zhong
Summary: In this study, a novel Z-scheme molecular photocatalyst was designed, in which the interfacial bonds and built-in electric field between Bi2WO6 and CoPc promoted charge transfer and the CoPc sites facilitated electron transfer and activation of oxygen molecules. The experimental results demonstrated that the photocatalyst exhibited superior activity for NO removal.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Chemical
Hongfei Yin, Chunyu Yuan, Huijun Lv, Xue Chen, Kaiyue Zhang, Yongzheng Zhang
Summary: Energy crisis and environmental problems caused by Cr(VI)-containing wastewater have attracted increasing attention due to the rapid development of human society. In this study, CeO2/CdS nanocomposites were successfully fabricated for photocatalytic hydrogen evolution and Cr(VI) reduction. The hybrid catalysts exhibited remarkable photocatalytic activities, surpassing the single components. The improved performance can be attributed to the unique electron and hole transfer pathway.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Energy & Fuels
Kesheng Wang, Qingyao Wang, Yuhua Zhao, Zifeng Zhang, Shengwen Liao, Yadan Deng, Xiang Wang, Qilu Ye
Summary: In this study, direct Z-scheme Bi2WO6-Bi2MoO6 heterojunctions were fabricated on TiO2 nanotube arrays using a simple hydrothermal deposition method. The Bi2WO6/Bi2MoO6 heterojunctions significantly improved solar absorption and suppressed electron recombination, leading to enhanced photoelectrocatalytic pollutant removal. The active species responsible for this effect were found to be ·OH and ·O-2 radicals. The TiO2 NTs/Bi2WO6-Bi2MoO6 photoelectrode exhibited excellent photoelectric conversion and photoelectrocatalytic H-2 evolution properties, surpassing those of TiO2 NTs/Bi2WO6 and TiO2 NTs/Bi2MoO6 photoelectrodes. The visible light photoelectrocatalytic H-2 evolution rate of the TiO2 NTs/Bi2WO6-Bi2MoO6 photoelectrode was measured to be 38.03 μmol·h(-1)·cm(-2), and it displayed sustained high photocatalytic activity after several experimental cycles. The exceptional photocatalytic performance of the TiO2 NTs/Bi2WO6-Bi2MoO6 sample provides a valuable reference for the construction of Z-scheme heterojunctions in photocatalytic pollutant removal and H-2 evolution applications.
Article
Materials Science, Multidisciplinary
Hanmei Hu, Tao Wang, Lulu Peng, Xiaohui Ling, Yunyun He, Mei Sun, Mingdi Yang, Chonghai Deng
Summary: A novel CdS/BiOBr heterojunction consisting of CdS quantum dots decorated on BiOBr nanoflakes was successfully synthesized using a facile microwave-assisted aqueous chemical synthesis technology. The synthesized heterojunction exhibited excellent photocatalytic performance for the degradation of organic pollutants, making it a promising candidate for industrial wastewater treatment.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Physical
Zihan Kang, Kanghui Ke, Enzhu Lin, Ni Qin, Jiang Wu, Rui Huang, Dinghua Bao
Summary: This study investigates the role of carriers in piezocatalysis by studying the separation mode under a dynamic polarization field. The synthesized heterojunctions with unique core-shell structures show enhanced piezocatalytic efficiency, providing a reference for the design of efficient catalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Energy & Fuels
Xiaolei Liu, Qingzhe Zhang, Dongling Ma
Summary: Semiconductor-based photocatalysis technology has attracted attention for its potential in utilizing solar energy to address energy and environmental issues. 2D/2D Z-scheme heterojunctions demonstrate superior performance in photocatalysis due to their rapid charge transfer and effective separation of charge carriers, showing promise in hydrogen production, CO2 reduction, and pollutant degradation.
Article
Engineering, Chemical
Fei Chang, Shanshan Zhao, Yibo Lei, Shijie Peng, Deng-guo Liu, Yuan Kong
Summary: In this study, alpha-MnS was used to modify Bi4O5Br2 to produce Bi4O5Br2/alpha-MnS (BMS) composites through a mechanical ball-milling method. The composites were characterized and confirmed to have integrated heterojunction structures. The composites BMS showed significantly improved photocatalytic degradation efficiency for bisphenol A (BPA) under visible light, with BMS0.05 exhibiting the highest catalytic outcome. The enhanced performance was attributed to increased visible-light absorption, suitable phase composition, and improved generation of reactive radicals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Wenxin Li, Xiaowen Ruan, Shuang Lian, Chao Xie, Xiaoqiang Cui, Jiku Wang
Summary: The Z-scheme CdS/BiOBr heterostructure synthesized by hydrothermal method exhibited enhanced photocatalytic performance in degrading Ciprofloxacin (CIP), Rhodamine B (RhB), and Tetracycline (TC) under visible light. The improvement can be attributed to extended visible light absorption and the Z-scheme photo-generated carriers' transfer route.
Article
Chemistry, Physical
Mei Su, Honggang Sun, Zhixue Tian, Zihao Zhao, Pan Li
Summary: In this study, a novel two-dimensional/two-dimensional WS2/Bi2WO6 heterostructure photocatalyst was designed and prepared, and its physical properties and photocatalytic activity were investigated. The results showed that the WS2/Bi2WO6 heterostructure exhibited excellent photocatalytic activity, large specific surface area, and good photo-stability. It facilitated the separation and transfer of photogenerated charges, and the active species generated in the system were verified by trapping experiments. Moreover, a Z-scheme photocatalytic mechanism was proposed.
APPLIED CATALYSIS A-GENERAL
(2022)
