Unusual reactivity of visible-light-responsive AgBr-BiOBr heterojunction photocatalysts
Unusual reactivity of visible-light-responsive AgBr-BiOBr heterojunction photocatalysts
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DOI：
10.1016/j.jcat.2012.06.011
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发表时间：
2012-09-01
影响因子：
7.3
通讯作者：
Edwards, Peter P.
中科院分区：
文献类型：
--
作者：
Kong, Liang;Jiang, Zheng;Edwards, Peter P.
不同负载量(0.5wt%)的AgBr-BiOBr异质结光催化剂导致AgBr物种孤立，光催化活性降低。其中，AgBr(0.2wt%)-BiOBr具有最高的可见光响应光催化活性，可在30min内将罗丹明B脱色。然而，在循环光催化实验中，这些AgBr-BiOBR材料逐渐失去了其光催化活性。在理论推测和实验观察的基础上，提出了AgBrBiOBr光催化活性增强和失活的可能机理。(C)2012 Elsevier Inc.保留所有权利。
AgBr-BiOBr heterojunction photocatalysts with varying loadings of AgBr (0.5 wt%) lead to isolated AgBr species and reduced photocatalytic activity. Among such catalysts, the AgBr (0.2 wt%)-BiOBr exhibits the highest visible-light-responsive photoactivity, which can decolorize Rhodamine B within 30 min. However, these AgBr-BiOBr materials gradually lost their photoactivity in the cycling photocatalytic tests. Possible mechanisms for both the enhanced photocatalytic activity and deactivation of the AgBr-BiOBr heterojunctions were proposed on basis of theoretical speculation and experimental observations. (C) 2012 Elsevier Inc. All rights reserved.