School of the Environment, Jiangsu University, Zhenjiang, 212013, P. R. China.
Dalton Trans. 2012 Mar 28;41(12):3387-94. doi: 10.1039/c2dt11969b. Epub 2012 Feb 6.
A novel heterojunction AgBr/BiPO(4) 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/BiPO(4) heterojunction exhibited a much higher photocatalytic activity than the pure BiPO(4). The mechanism of the enhancing AgBr/BiPO(4) heterojunction's photocatalytic activity was discussed. It was also found that the photocatalytic degradation of MB over AgBr/BiPO(4) heterojunction photocatalysts followed the pseudo-first-order reaction model.
采用水热法合成了一种新型的 AgBr/BiPO(4) 异质结光催化剂。通过 X 射线粉末衍射 (XRD)、扫描电子显微镜 (SEM) 和能谱 (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) 对催化剂进行了表征。XRD、SEM-EDS、TEM 和 XPS 分析表明，在水热处理过程中形成了异质结结构。通过亚甲基蓝 (MB) 的降解评价了光催化剂的光催化活性。结果表明，AgBr/BiPO(4) 异质结的光催化活性明显高于纯 BiPO(4)。讨论了提高 AgBr/BiPO(4) 异质结光催化活性的机理。还发现，AgBr/BiPO(4) 异质结光催化剂上 MB 的光催化降解遵循准一级反应模型。
