玻璃上透明纳米TiO_2薄膜的制备  

Preparation and Photocatalytic Activity of Transparent Nano-Sized TiO_2 Thin Films On Glass

作　　者：王玲[1] 张振伟[1] 胡玉芬[1] 张颖[1] 孙国新[1] 

机构地区：[1]济南大学化学化工学院,山东济南250022

出　　处：《济南大学学报（自然科学版）》2005年第1期17-20,共4页Journal of University of Jinan(Science and Technology)

基　　金：济南市科技计划资助项目 (0 2 10 5 0 )

摘　　要：以钛醇盐为前驱物 ,采用溶胶 -凝胶法 (sol-gel)制备了透明锐钛矿型纳米TiO2 薄膜。利用X射线衍射 (XRD)、扫描电镜 (SEM)及能谱分析 (EDS)对TiO2 薄膜的结构及特征进行了表征。考察了酸的种类、硝酸浓度、钛酸四丁酯(TBOT)以及聚乙二醇 (PEG)含量、涂膜层数和Fe3 + 、Cu2 + 离子掺杂等因素对涂膜玻璃光催化活性和透明性的影响。结果表明 :所制备的TiO2 薄膜主要以锐钛矿形式存在 ,膜层数低于 5层时 ,薄膜表面光滑透明 ;随着膜层数的增加 ,薄膜的光催化活性增加 ,透明性和透光率下降。当膜层数为 14层时 ,光催化活性达到最高 80 % ,在可见光范围内的透光率为70 %。适量铁或铜离子的掺杂 ,均可提高薄膜的光催化活性 ,并且离子掺杂不影响薄膜的透明性和透光率 ,两者的最佳掺杂浓度均为 1.0× 10 -5mol·L-1。Transparent nano-sized anatase TiO_2 thin films with high photocatalytic activity were prepared via the sol-gel method on soda-lime glass.The thin films were characterized by XRD,SEM and EDS.The influences of the kind of acids,concentrations of HNO_3,the content of TBOT and PEG,film layers and dope of Fe3+、Cu2+ were investigated on the photocatalytic activity and the transparence of the coated glass.The results show that the main phase in the prepared films is mainly anatase.When the number of layer is under 5,the film is transparent and smooth;while the film surface changes dimmer with the increase of the layers.When the layers are 14,the transparency of the glass coated TiO_2 in visible spectra is still high,which can reach up to 70%.The degrading rate of methyl orange in aqueous solution can reach 80%.The doping of Fe3+ and Cu2+ can increase the photocatalytic activity and the best doped concentrations are all 1.0×10-5 mol·L-1.The doped ions don't influence the film's transparence and transmittance

关 键 词：SOL-GEL法 透明性 纳米TIO2薄膜 光催化活性 

分 类 号：O643.3[理学—物理化学]