纳米TiO_2光催化剂的结构调控及其光催化活性研究  

Texture modification and photocatalytic activity estimation of nanometer TiO_2 particle

作　　者：袁建梅[1] 安太成[2] 陈慧[1] 陈嘉鑫[2] 丁雪军[2] 盛国英[2] 傅家谟[2] 

机构地区：[1]西北师范大学化学化工学院,甘肃兰州730070 [2]中国科学院广州地球化学研究所有机地球化学国家重点实验室和广东省环境资源利用与保护重点实验室,广东广州510640

出　　处：《功能材料》2005年第3期477-480,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(40302013);广东省自然科学基金资助项目(030466);有机地球化学国家重点实验室开放基金资助项目(OGL 200309)

摘　　要：以酞酸丁酯和冰醋酸分别为前驱物和酸催化剂,采用溶胶 凝胶法制备了纳米 TiO2 粉体, 并且通过改变水体溶液中酞酸丁酯,醋酸和水的摩尔比来调控纳米TiO2 粉体的大小以及光催化活性;探讨在溶胶 凝胶法制备过程中在水溶液中添加表面活性剂十二烷基苯磺酸钠 ( DBS ) 和共溶剂无水乙醇(CH3CH2OH)来调控TiO2 粉体以及光催化活性。用X射线衍射和透射电子显微镜等手段对不同条件制备的纳米粉体的微观结构进行了表征,并且以甲基橙染料的降解为模型反应,考察了不同制备条件下的催化剂的光催化活性,而且对纳米粉体结构和光催化性能之间的关系进行了讨论。TiO2 powder was prepared by the sol-gel technique with the tetra-n-butyl titanate as the main raw material and acetic acid as the acid catalyst, and the size of Nanometer TiO2 was controlled at different ratios of Ti(OC4H9)4: CH3COOH: H2O. During preparation process of TiO2, dodecyl benzene sulfate sodium (DBS) and ethanol was added into the sol to improve the photocatalytic activity of Nanometer TiO2. Many modern analysis techniques such as TEM and XRD were used to characterize the structure and morphologies. The photocatalytic activity of prepared TiO2 was evaluated using methyl orange as a mode organic pollutant. The results indicate that the prepared TiO2 has higher photocatalytic activity for the degradation of m ethyl orange (MO).

关 键 词：溶胶-凝胶法 纳米TIO2 光催化 甲基橙 

分 类 号：O643[理学—物理化学]