TiO_2纳米管的光催化作用  

Photocatalytical Degradation over TiO_2 Nanotubes

作　　者：邵颖[1] 薛宽宏[1] 陈巧玲[1] 何春建[1] 陶菲菲[1] 沈伟[1] 刘传[1] 冯玉英[2] 

机构地区：[1]南京师范大学化学系,南京210097 [2]南京师范大学分析测试中心

出　　处：《应用化学》2003年第5期433-436,共4页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金 ( 2 9973 0 14 );南京师范大学材料重点实验室资助课题

摘　　要：以多孔氧化铝为模板制备出的锐钛矿型TiO2 纳米管管径均匀 ,管壁粗糙 ,由许多非常细小的TiO2 纳米粒子组成。在通空气条件下 ,该TiO2 纳米管对于十二烷基苯磺酸钠的光催化降解表现出很高的光催化活性 ,持续光照 2 0min可降解 3 0 %。紫外可见漫反射吸收光谱和结构表征的实验结果表明 ,TiO2 纳米管具有较宽的禁带和较小的电子 空穴复合几率 ,因此 ,其空穴 电子对具有强氧化 还原能力和高催化活性。Anatase TiO 2 nanotubes were prepared from tetrabutyl titanate(Ti(OC 4H 9) 4) using porous alumina as a template. The nanotubes exhibited uniform diameter, but rough walls and consisted of small crystals. They manifest high photocatalytic activity in the degradation of sodium dodecyl benzene sulfonate(SDBS) with bubbling air. About 30% SDBS was degraded under 20 min irradiation. UV vis spectra and the structure identification revealed that the TiO 2 nanotubes have greater energy gap, less possibility for the combination of electron hole pairs, to give stronger redox ability and higher photocatalytic activity than TiO 2 film.

关 键 词：TIO2纳米管 光催化降解 十二烷基苯硝酸钠 紫外可见光谱 

分 类 号：O643.3[理学—物理化学]