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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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. |
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ISSN: | 2046-2069 |
DOI: | 10.1039/c5ra17552f |