TiO_2气凝胶的结构控制研究

STUDY ON STRUCTURE CONTROLLING OF TiO_2 AEROGELS

本文以正钛酸丁酯为先驱物，通过溶胶一凝胶过程和CO2超临界干燥制得TiO2气凝胶。研究了乙醇、水、催化剂用量等对TiO2气凝胶的比表面积、表观体密度和线收缩率的影响。利用这些因素可以实现对该材料的结构进行控制。

TiO2 Aerogels are prepared through sol-gel process and super eritical drying technique from Ti (OC4H9)4. The use of the amout of ethanol, water and catalyst affect the structure of aerogels severely, and the effects of these factors can be used to control the structure of TiO2 aerogels.