以硝酸铋和偏钒酸铵为无机源,NaOH为pH值调节剂,利用水热法制备了多种结构和形貌的BiVO4,并利用X射线衍射(XRD)、扫描电子显微镜(SEM)和紫外-可见吸收光谱(UV-vis DRS)等分析手段表征了其物化性质.结果表明前驱液的pH值对制得BiVO4产物的晶型和粒子形貌有很大影响.考察了BiVO4样品在可见光(λ＞420 nm)下降解罗丹明B的催化活性和总有机碳(TOC)浓度的变化,结果表明前驱液pH值为6.7时所得BiVO4具有最好的光催化活性,可见光催化4h后,罗丹明B的降解率达到95.3％.TOC值随着光解反应时间的延长而减小,表明罗丹明B发生了矿化.另外,对BiVO4光催化剂的晶型、形貌和性能之间的联系也进行了简单的探讨.
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