In situ preparation of novel heterojunction BiOBr/BiVO4 photocatalysts with enhanced visible light photocatalytic activity

Heterojunction photocatalysts BiOBr/BiVO 4 were in situ synthesized through acid etching coupled with a hydrothermal process, and the optimized BiOBr/BiVO 4 ratio was tuned to explore their visible-light photocatalytic activity for MB degradation. Remarkably, BiOBr/BiVO 4 composites exhibited higher...

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Hauptverfasser: Wu, Xiaobin, Zhou, Hualei, Gu, Shaonan, Wang, Fangzhi, Liu, Jia, Li, Wenjun
Format: Artikel
Sprache:eng
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Zusammenfassung:Heterojunction photocatalysts BiOBr/BiVO 4 were in situ synthesized through acid etching coupled with a hydrothermal process, and the optimized BiOBr/BiVO 4 ratio was tuned to explore their visible-light photocatalytic activity for MB degradation. Remarkably, BiOBr/BiVO 4 composites exhibited higher visible-light photocatalytic ability compared with single BiVO 4 and BiOBr alone. The charge-separation process was interpreted based on the energy band structure. The heterojunction formed between BiVO 4 and BiOBr, that effectively promotes the separation of photo-induced electrons and holes, is responsible for the improved photocatalytic activity. Heterojunction BiOBr/BiVO 4 photocatalysts were in situ synthesized through acid etching coupled with a hydrothermal process and they displayed higher photocatalytic activity than pure BiOBr and BiVO 4 for MB removal under visible light irradiation.
ISSN:2046-2069
DOI:10.1039/c5ra17552f