中文摘要：

采用盐酸水溶液处理BiVO4的方法获得增强的光催化活性．在0．1mol·L-1酸溶液中浸渍反应6h．BiVO4的可见光催化降解苯酚的活性提高了3．5倍．采用X射线衍射（XRD），扫描电镜（TEM）和漫反射光谱（DRS）等表征手段研究处理后样品的晶相组成和表面形貌，结合不同酸和氯化物处理的对照实验．结果表明，在H＋和Cl-的协同作用下，BiVO。表面部分溶出并以BiOCl沉积。形成了表面具有凹陷沟壑的BiVO4颗粒与片状结构BiOCl的复合物．采用悬浮液光电压法测定BiOCl平带电位，通过BiVO4和BiOCl的能带分析及其混合颗粒的光催化活性测试，确证二者间不存在颗粒问电子转移效应．增强的光催化活性主要归因于BiVO4表面形成了有助于光生电荷迁移的凹凸不平结构．这种表面处理方法有望成为一种增强半导体化合物光催化活性的有效途径．

英文摘要：

Enhanced photocatalytic activity of BiVO4 has been achieved by immersing in HCI aqueous solution. After treated for 6 h in 0.1 tool. L-1 HCI solution, the visible light activity of BiVO, for phenol degradation increased by 3.5 times. X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and diffuse reflectance spectroscopy （DRS） were carried out to analyze the crystal components and surface morphology of the treated samples. Comparison of samples treated in different acids and chlorides indicated that with the appropriate concentrations of H ＋ and Cl- ions, BiVO4 partially dissolved, was deposited as BiOCl, and finally a composite of flaked BiOCI and micro-particles of BiVO4 with pits formed over the surface. The flatband potential of BiOCI was measured by a slurry method. According to the results of energy band analyses and photocatalytic activity tests of mixed BiVO, and BiOCI particles, there is no interparticle electron transfer effect between them. Therefore, the mechanism of the enhanced photocatalytic performance of the treated BiVO, can be attributed to the unevenness of the surface, which can facilitate photogenerated charge separation. This type of surface treatment method could be developed into an effective method for preparing photocatalysts with enhanced photocatalytic performance.