Bismuth Oxybromide with Reasonable Photocatalytic Reduction Activity under Visible Light

Bismuth Oxybromide with Reasonable Photocatalytic Reduction Activity under Visible Light

The original bismuth-based oxyhalide, known as the Sillén family, is an important photocatalyst due to its high photocatalytic oxidation activity. Here, we report a bismuth-based photocatalyst, Bi24O31Br10, with reasonable reduction activity. The photoreduction capability of Bi24O31Br10 in H2 evolu...

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Veröffentlicht in:ACS catalysis 2014-03, Vol.4 (3), p.954-961
Hauptverfasser: Shang, Jun, Hao, Weichang, Lv, Xiaojun, Wang, Tianmin, Wang, Xiaolin, Du, Yi, Dou, Shixue, Xie, Tengfeng, Wang, Dejun, Wang, Jiaou
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container_end_page 961
container_issue 3
container_start_page 954
container_title ACS catalysis
container_volume 4
creator Shang, Jun
Hao, Weichang
Lv, Xiaojun
Wang, Tianmin
Wang, Xiaolin
Du, Yi
Dou, Shixue
Xie, Tengfeng
Wang, Dejun
Wang, Jiaou
description The original bismuth-based oxyhalide, known as the Sillén family, is an important photocatalyst due to its high photocatalytic oxidation activity. Here, we report a bismuth-based photocatalyst, Bi24O31Br10, with reasonable reduction activity. The photoreduction capability of Bi24O31Br10 in H2 evolution from water reduction is 133.9 μmol after 40 h under visible light irradiation. Bi24O31Br10 presents the highest activity among Bi2O3, BiOBr, and Bi24O31Br10 in photocatalytic reduction of the Cr (VI) test, and Cr (VI) ions are totally removed in 40 min. The Mott–Schottky test shows the bottom of the conduction band fits the electric potential requirements for splitting water to H2. First-principles calculations indicate the conduction band of Bi24O31Br10 mainly consists of hybridized Bi 6p and Br 4s orbitals, which may contribute to the uplifting of the conduction band.
doi_str_mv 10.1021/cs401025u
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Here, we report a bismuth-based photocatalyst, Bi24O31Br10, with reasonable reduction activity. The photoreduction capability of Bi24O31Br10 in H2 evolution from water reduction is 133.9 μmol after 40 h under visible light irradiation. Bi24O31Br10 presents the highest activity among Bi2O3, BiOBr, and Bi24O31Br10 in photocatalytic reduction of the Cr (VI) test, and Cr (VI) ions are totally removed in 40 min. The Mott–Schottky test shows the bottom of the conduction band fits the electric potential requirements for splitting water to H2. 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