纳米Ce-WO_3-TiO_2光催化剂的制备及性能  

Preparation and Photocatalytic Property of Ce-WO_3-TiO_2 Nanoparticles

作　　者：张定国[1] 李发亮[1] 刘芬[1] 陈昌林[1] 

机构地区：[1]东华理工大学化学生物与材料科学学院,江西抚州344000

出　　处：《化学反应工程与工艺》2008年第1期45-49,共5页Chemical Reaction Engineering and Technology

基　　金：江西省自然科学基金资助项目(0520002)

摘　　要：采用溶胶-凝胶(sol-gel)和浸渍相结合的方法制备了纳米Ce-WO3-TiO2光催化剂,用X射线衍射(XRD)和紫外-可见漫反射光谱进行了表征,并以甲基橙为模拟有机污染物进行了降解实验。结果表明,相对于单纯的TiO2,WO3耦合的TiO2和Ce掺杂的TiO2光催化剂,Ce-WO3-TiO2纳米复合光催化剂的平均粒径更小,光的吸收带边发生更大的红移。当掺杂量Ce,WO3和TiO2的物质的量之比为2.0∶1.0∶100时,Ce-WO3-TiO2光催化的活性最高。甲基橙90 min的降解率达92%,比单纯TiO2的光催化活性提高80%。Ce-WO3-TiO2 photocatalysts were prepared by sol-gel and impregnation method and characterized by X ray diffraction （XRD）, diffuse reflection spectrum （DRS） techniques and studied on degradation of methyl orange . The results showed that the sizes of Ce-WO3-TiO2 were smaller compared with pure TiO2, WO3-doped TiO2 and Ce-doped TiO2, and the absorption edge shifted remarkably toward longer wavelength. The performance of Ce-WO3-TiO2 was the best when molar ratio of Ce, WO3 and TiO2 was 2.0 ： 1.0 ： 100. After 90 min, the degradation percentage of methyl orange was 92%, which was 80% higher than the activity of pure TiO2 .

关 键 词：掺杂光催化剂 有机物降解 甲基橙 

分 类 号：O643[理学—物理化学]