Synthesis, characterization and photocatalytic property of AgBr/BiPO4 heterojunction photocatalyst
Synthesis, characterization and photocatalytic property of AgBr/BiPO4 heterojunction photocatalyst
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AgBr/BiPO4异质结光催化剂的合成、表征及光催化性能
DOI：
10.1039/c2dt11969b
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发表时间：
2012-01-01
影响因子：
4
通讯作者：
Wan, Huilin
中科院分区：
文献类型：
--
作者：
Xu, Hui;Xu, Yuanguo;Wan, Huilin
采用水热法合成了一种新型异质结AgBr/BiPO4光催化剂。通过X射线粉末衍射(XRD)、扫描电子显微镜(SEM)和能量色散X射线光谱(EDS)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)和漫反射光谱(DRS)对光催化剂进行了表征。 XRD、SEM-EDS、TEM 和 XPS 分析表明异质结结构是在水热处理过程中形成的。通过亚甲基蓝染料（MB）的降解来评价光催化剂的光催化活性。结果表明AgBr/BiPO4异质结比纯BiPO4表现出更高的光催化活性。讨论了增强AgBr/BiPO4异质结光催化活性的机制。研究还发现 AgBr/BiPO4 异质结光催化剂对 MB 的光催化降解遵循准一级反应模型。
A novel heterojunction AgBr/BiPO4 photocatalyst was synthesized with the hydrothermal method. The photocatalyst was characterized by X-Ray powder Diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectrometry (EDS), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectrscopy (XPS) and Diffuse Reflectance Spectroscopy (DRS). The XRD, SEM-EDS, TEM and XPS analyses indicated that the heterojunction structure formed during the process of hydrothermal treatment. The photocatalytic activity of the photocatalysts was evaluated by degradation of methylene blue dye (MB). The results indicated that the AgBr/BiPO4 heterojunction exhibited a much higher photocatalytic activity than the pure BiPO4. The mechanism of the enhancing AgBr/BiPO4 heterojunction's photocatalytic activity was discussed. It was also found that the photocatalytic degradation of MB over AgBr/BiPO4 heterojunction photocatalysts followed the pseudo-first-order reaction model.