期刊
APPLIED SURFACE SCIENCE
卷 546, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.148887
关键词
g-C3N4-BiOCl(x)Br(1-)x; Heterojunction; Solid solution; Band structure engineering; Z-scheme system
类别
资金
- National Natural Science Foundation of China [51702303]
- Sichuan Science Technology plan Project [2019YJ003]
- Open Project of State Key Laboratory of Environmentfriendly Energy Materials [19kfhg02]
- Laboratory of Precision Manufacturing Technology of CAEP [ZZ16006]
A series of g-C3N4-BiOClxBr1-x direct Z-scheme heterojunctions were successfully constructed, leading to enhanced visible-light response and improved photocatalytic activity. This work provides insights for designing high-efficiency photocatalysts with reasonable structure.
A series of g-C3N4-BiOClxBr1-x direct Z-scheme heterojunctions were successfully constructed by direct pyrolysis and solvothermal routes. Direct Z-scheme system not only efficiently separated the charge carriers, but also retained their strong oxidizing and reducing capacity. In addition, the light absorption of BiOClxBr1-x solid solutions extended into the visible light region with the increase of bromine content. Benefiting from the joint utilization of heterojunction construction and solid solution fabrication strategies, g-C3N4-BiOCl0.5Br0.5 (g-C5B5) heterojunction presented notably improved photocatalytic activity with the apparent rate constant of 0.1698 min(-1). The synergistic effects were mainly expounded as the enhanced visible-light response, promoted separation of electron-hole pairs and optimized redox potentials of charge carriers, which was further verified on the basis of photocatalytic experiment and a series of characterization. This work provides a novel insight to design high-efficiency photocatalysts with reasonable structure for removing environmental pollutants and converting solar energy.
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