免烧型氧化钛薄膜的微观结构和光催化动力学  

Microstructure and Photocatalysis Kinetics of Calcination-Free TiO_2 Film

作　　者：高基伟[1,2] 杨辉[1,2] 宁海水[1] 盛建松[2] 

机构地区：[1]浙江大学材料科学与工程学系,浙江杭州310027 [2]浙江大学绿色建材及应用技术工程研究中心,浙江杭州310027

出　　处：《稀有金属材料与工程》2008年第A02期136-138,共3页Rare Metal Materials and Engineering

基　　金：国家科技支撑计划(2006BAJ05B05);浙江省科技计划(2005C24005)资助

摘　　要：以溶胶-凝胶工艺和"钛酸丁酯-水-无水乙醇-盐酸"体系,制备出含有锐钛矿晶体的氧化钛溶胶,溶胶成膜后无需煅烧即可具备光催化性能。作者总结锐钛矿溶胶成膜的"铺展-挥发-收缩-分区-成岛"过程,建立起"岛屿模型",并在扫描电镜图中观察到片状锐钛矿晶体的聚集体,证实了模型的合理性;以免烧型薄膜降解罗丹明B水溶液,发现光催化反应在动力学上为一级反应,半衰期为134.6。TiO2 sol, containing anatase crystals, was prepared from Ti （OC4H9）4, H2O, C2H5OH and HCl by sol-gel method. The films made of the anatase sols can possess photocatalytic property without high temperature heat treatment or calcinations. The author studied the filming course and made up the temporary theory model of sol filming： a way of ＂split-shrink-island＂, which can be called ＂island model＂. The congeries of anatase crystals in the Scanning Electron Microscopy images of the films proved that the theory model was reasonable. The film made of the anatase sol at room temperature can decompose Rhodamine B under UV light, whose photocatalytic reaction turned out to be a first-order one with a half time of 134.6.

关 键 词：免烧型薄膜 岛屿模型 光催化反应 动力学分析 锐钛矿溶胶 

分 类 号：TB383.2[一般工业技术—材料科学与工程]