不同制备方法对TiO_2/HZSM-5光催化剂的结构及性能影响  

Effect of Preparation Method on the Structure and Performance of TiO_2/HZSM-5 Photocatalyst

作　　者：吴艳林[1] 胡芸[1] 韦朝海[1] 

机构地区：[1]华南理工大学环境科学与工程学院工业聚集区污染控制与生态修复教育部重点实验室,广州510006

出　　处：《硅酸盐通报》2009年第6期1123-1128,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金项目(20807015);教育部留学回国人员科研启动基金;教育部高校博士点基金(200805611055);华南理工大学"百人计划"科研启动基金

摘　　要：分别以钛氧草酸铵、钛酸丁酯和P25型TiO2为钛源,相应采用浸渍法、溶胶-凝胶法和固相扩散法制备了三种HZSM-5分子筛负载型纳米TiO2光催化剂,并在紫外光下对甲基橙(MO)进行了光催化降解性能考察。结果表明,采用方法简单易控制且无需有机溶剂的浸渍法制备的催化剂对MO的去除效果比用溶胶-凝胶法和固相扩散法制备的样品更好。用XRD、UV-VisDRS和BET等技术对催化剂结构进行表征的结果表明,浸渍法制备的光催化剂具有较大的比表面积,并且TiO2在分子筛外表面有更好的分散性,导致其具有高的光催化活性。TiO2/HZSM-5 photocatalysts were prepared by impregnation,Sol-gel and solid state dispersion methods,using ammonium titanyl oxalate,tetrabutyl titanate and P-25 as titanium source respectively.The photocatalytic reactivity of the prepared samples for the degradation of methyl orange（MO）under UV light irradiation were investigated.The catalyst prepared by a simple,easy to control and organic-solvent-free impregnation method showed a higher photocatalytic activity than that prepared by Sol-gel and solid state dispersion methods.The structure of the catalysts were characterized by XRD,UV-Vis DRS and BET technologies.It was found that TiO2/HZSM-5 prepared by impregnation had a higher surface area and the nano TiO2 particles well dispersed on the surface of zeolite leading to a higher photocatalytic activity.

关 键 词：光催化 TiO2/HZSM-5 制备方法 

分 类 号：TU528.2[建筑科学—建筑技术科学]