A novel visible-light-active β-Bi2O3/BiOBr heterojunction photocatalyst with remarkably enhanced photocatalytic activity
A novel visible-light-active β-Bi2O3/BiOBr heterojunction photocatalyst with remarkably enhanced photocatalytic activity
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DOI：
10.1016/j.catcom.2018.10.025
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发表时间：
2019-01
影响因子：
3.7
通讯作者：
Xinde Tang;Zhengrong Wang;Ning Wu;Shuilin Liu;Ning Liu
中科院分区：
文献类型：
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作者：
Xinde Tang;Zhengrong Wang;Ning Wu;Shuilin Liu;Ning Liu
用HBr原位处理β-Bi2O3，成功合成了一系列β-Bi2O3/BiOBr异质结光催化剂。与纯β-Bi2O3和BiOBr相比，合成的β-Bi2O3/BiOBr复合材料对RhB的可见光催化降解活性显著增强。最佳样品的表观速率常数分别是纯β- bi2o3和BiOBr的50.9倍和7.1倍。增强的光催化活性是由于β- bi2o3和BiOBr之间形成异质结，导致电子-空穴对的有效分离。本研究提供了一种具有可见光活性的新型β- bi2o3基异质结光催化剂，具有实际应用前景。
A series of β-Bi2O3/BiOBr heterojunction photocatalysts were successfully synthesized by in-situ treatment of β-Bi2O3with HBr. The as-synthesized β-Bi2O3/BiOBr composites displayed remarkably enhanced visible light photocatalytic activity for RhB degradation compared to pure β-Bi2O3and BiOBr. The value of the apparent rate constant for the optimal sample was about 50.9 and 7.1 times higher than that of pure β-Bi2O3and BiOBr, respectively. The enhanced photocatalytic activity is attributed to the formation of a heterojunction between β-Bi2O3and BiOBr, which leads to an efficient separation of electron-hole pairs. The present work provides a new type of visible-light-active β-Bi2O3-based heterojunction photocatalysts that are promising for practical applications.