BiVO_4/BiOCl复合材料的制备及其光催化性能的研究  

Synthesis and photocatalytic properties of BiVO_4/BiOCl composite photocatalysts

作　　者：王嘉楠[1] 倪刚[1] 李玲玲[1] 李静[1] 

机构地区：[1]宁夏大学化学化工学院,宁夏银川750021

出　　处：《现代化工》2014年第9期59-63,共5页Modern Chemical Industry

基　　金：国家自然科学基金资助项目(21067010;21365016);宁夏高校科学研究基金项目(2012)

摘　　要：通过水热-溶剂热法制备了BiVO4/BiOCl复合材料。采用X射线衍射、扫描电子显微镜、紫外-可见漫反射等测试手段对复合光催化剂的结构、形貌和光学性质进行表征。考察了其对罗丹明B的吸附性能和光催化性能。结果表明,与纯BiVO4样品相比,BiVO4/BiOCl样品对罗丹明B的吸附能力和光催化降解能力都显著增强。BiVO4/BiOCl对罗丹明B的光催化反应符合一级反应的特点,且复合光催化剂具有较高的稳定性,重复使用3次后,罗丹明B的降解率变化不明显,仍可达到95%。The BiVO4/BiOCl composite photocatalysts are prepared by the hydrothermal-solvothermal method. The crystalline structures, morphologies and optical properties of the BiVQ/BiOCl composite photocatalysts are characterized by X-ray diffraction, scanning electron microscope and ultraviolet-visible absorption spectroscopy. The adsorptive property and photocatalytic activity of BiVOJBiOCl samples are investigated by using the adsorption and photodegradation of Rhodamine B. The results reveal that the composite samples show superior adsorption capacity and superior photocatalytic activity under ultraviolet-visible light and visible light irradiation compared to the pure BiVO4 sample. The photocatalytic reaction results indicate that the degradation of Rhodamine B by using BiVO4/BiOCl is a first-order reaction. The BiVO4/BiOCl photoeatalyst has high stability. After the catalyst is used 3 times, the degradation rate of Rhodamine B still reaches 95.0%.

关 键 词：BiVO4/BiOCl复合光催化剂 吸附性能 光催化 

分 类 号：O643.32[理学—物理化学] TB39[理学—化学]