利用TiCl4的乙醇溶液作为前驱体 ,运用溶胶凝胶法制备了TiO2 纳米粉体 .研究结果表明 ,在TiCl4与乙醇混合成溶液的过程中 ,TiCl4即与乙醇及乙醇中的微量水发生醇解和部分水解脱氯反应形成钛酸酯 .在随后的成胶化过程中 ,则主要是钛酸酯吸收气氛中的水气 ,脱去乙醇基形成Ti-OH键并发生缩脱水聚合形成无机聚合物溶胶 .增加成胶化时间 ,可以促进乙醇基的脱去和无机聚合物的形成 ,促进锐钛矿TiO2 纳米颗粒的形成 TiCl4 ethanol solution was used as precursor to prepare TiO2 nanopowders by sol-gel method.The results show that in the process of mixing TiCl4 and ethanol into solution, TiCl4 can react with trace amount of water in ethanol and ethanol Part of the hydrolysis dechlorination reaction to form titanate.In the subsequent gelation process, the main is titanate absorption of moisture in the atmosphere, off the alcohol group to form Ti-OH bond and dewatering polymerization to form an inorganic polymer Sol. Increasing the gelling time, can promote the removal of ethanol-based and inorganic polymer formation, and promote the formation of anatase TiO2 nanoparticles