利用负载大量金属的BiVO₄光催化剂实现可见光驱动的布洛芬降解
Visible-light driven degradation of ibuprofen using abundant metal-loaded BiVO₄ photocatalysts.
作者信息
Bian Zhao-Yong, Zhu Ya-Qi, Zhang Jun-Xiao, Ding Ai-Zhong, Wang Hui
机构信息
College of Water Sciences, Beijing Normal University, Beijing 100875, PR China.
College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China.
出版信息
Chemosphere. 2014 Dec;117:527-31. doi: 10.1016/j.chemosphere.2014.09.017. Epub 2014 Sep 29.
An efficient method for the degradation of ibuprofen as an aqueous contaminant was developed under visible-light irradiation with as-prepared bismuth vanadate (BiVO4) catalysts. The metal-loaded catalysts Cu-BiVO4 and Ag-BiVO4 were synthesized using a hydrothermal process and then a wet-impregnation method. All of the materials were fully characterized by X-ray diffraction, scanning electron microscopy, UV-vis diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy and BET surface area. The results indicated that all of the prepared samples had monoclinic scheelite structures. In the metal-loaded catalysts, silver existed as a mixture of Ag and Ag2O on the surface of the catalysts. However, copper existed as Cu2O and CuO. Additionally, the band gap values of BiVO4, Ag-BiVO4, and Cu-BiVO4 were 2.38, 2.31, and 2.30eV, respectively. Compared to the BiVO4 catalyst, the metal-loaded BiVO4 catalysts showed superior photocatalytic properties for the degradation of ibuprofen.
在可见光照射下，利用所制备的钒酸铋（BiVO4）催化剂开发了一种有效降解水中污染物布洛芬的方法。采用水热法然后湿浸渍法合成了负载金属的催化剂Cu-BiVO4和Ag-BiVO4。通过X射线衍射、扫描电子显微镜、紫外可见漫反射光谱、X射线光电子能谱和BET表面积对所有材料进行了全面表征。结果表明，所有制备的样品均具有单斜白钨矿结构。在负载金属的催化剂中，银以Ag和Ag2O的混合物形式存在于催化剂表面。然而，铜以Cu2O和CuO的形式存在。此外，BiVO4、Ag-BiVO4和Cu-BiVO4的带隙值分别为2.38、2.31和2.30eV。与BiVO4催化剂相比，负载金属的BiVO4催化剂对布洛芬的降解表现出优异的光催化性能。
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