La^(3+)和Fe^(3+)共掺杂TiO_2/天然沸石的制备与光催化性能  

Preparation and Characterization of Fe^(3+) and La^(3+) Co-Doped TiO_2/Natural Zeolite

作　　者：马正先[1] 张宁[1] 刘江[1] 

机构地区：[1]辽宁工程技术大学矿业技术学院,辽宁葫芦岛125105

出　　处：《硅酸盐学报》2011年第10期1564-1569,共6页Journal of The Chinese Ceramic Society

基　　金：辽宁省教育厅重点实验室项目(2009S050)资助

摘　　要：以钛酸正四丁酯为原料、无水乙醇为溶剂、冰乙酸为抑制剂、天然沸石为载体,采用溶胶-凝胶法制备了Fe3+、La3+掺杂TiO2/天然沸石和Fe3+与La3+共掺杂TiO2/天然沸石复合光催化剂,并利用紫外高压汞灯为光源的自制反应器进行光催化降解甲基橙试验。通过用X射线衍射、扫描电子显微镜和能谱,分析了光催化剂晶体结构和表面特性对光催化效果的影响。结果表明:La3+和Fe3+共掺杂TiO2/天然沸石光催化剂的光催化效果好于Fe3+或La3+单独掺杂TiO2/天然沸石的,而La3+掺杂TiO2/天然沸石光催化剂的光催化效果好于Fe3+掺杂TiO2/天然沸石的。The photocatalysts of Fe3＋ or La3＋ doped TiO2/natural zeolite and Fe3＋ and La3＋ co-doped TiO2/natural zeolite were prepared with Ti（OBu）4 as an initial material, anhydrous ethanol as a solvent, natural zeolite as a carder and glacial acetic acid as a depressor by a sol-gels method. The experiments of photocatalytic oxidation of methyl orange were carried out in a self-made reactor with the light resource from a ultraviolet radiation antiseptic lamp. The effects of crystal structure and surface character on the photocatalytic activity of the photocatalyst samples were analyzed by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy, respectively. The results indicate that the photocatalytic activity of La3＋and Fe3＋ co-doped TiO2/natural zeolite is better than that of Fe3＋ or La3＋ doped TiO2/natural zeolite, and the photocatalytic activity of La3＋ doped TiO2/natural zeolite is better than that of Fe3＋ doped TiO2/natural zeolite.

关 键 词：天然沸石 二氧化钛 光催化 溶胶-凝胶 共掺杂 

分 类 号：TB383[一般工业技术—材料科学与工程]