模板组装纳米TiO_2多孔膜及形成机理  

Preparation of Nano-Titania Porous Films by Templating and the Formation Mechanism

作　　者：步绍静[1] 靳正国[1] 刘晓新[1] 杨立荣[1] 程志捷[1] 

机构地区：[1]先进陶瓷与加工技术教育部重点实验室天津大学,天津300072

出　　处：《化学反应工程与工艺》2004年第4期310-315,共6页Chemical Reaction Engineering and Technology

基　　金：天津市自然科学基金资助重点项目(F103004)

摘　　要：以钛酸丁酯(TBTi)为原料,加入高分子表面活性剂聚乙二醇(PEG)作模板,采用溶胶-凝胶技术合成了孔径10-500nm可调的纳米TiO2多孔薄膜。扫描电镜(SEM)观察结果表明,合成过程中水含量增加形成的薄膜孔密度减小,而PEG加入量的增加,薄膜表面孔径和孔密度增大。通过红外光谱测试对溶胶-凝胶过程中发生的物理化学变化进行了系统的分析,初步探讨了薄膜多孔结构的形成机理。Nano-titania porous thin films were synthesized by sol-gel method using tetrabutylti tanate (TBTi) as a precursor and polyethylene glycol(PEG) as a template. The pore sizes can be negulated in the range of 10-500 nm. The results by scanning electron microscope (SEM) showed that the numbers of pores in the films decreased with the larger amount of water in preparation process, the sizes and numbers of pores produced in the resultant TiO2 films were larger with the larger amount of PEG. The physical and chemical changes in sol-gel were analyzed systematically by means of IR spectra, the formation mechanism of the porous structure was discussed elementarily.

关 键 词：膜孔 纳米TiO2 高分子表面活性剂 加入量 合成过程 钛酸丁酯 多孔薄膜 多孔膜 聚乙二醇(PEG) 溶胶-凝胶技术 

分 类 号：TQ423[化学工程] O484[理学—固体物理]