Sol-Gel法制备纳米二氧化钛凝胶的工艺优化
来源期刊:中国有色金属学报2000年第z1期
论文作者:陈建军 陈晓春 李庆余 李劼 刘业翔 陈汉东
文章页码:84 - 87
关键词:光催化; 纳米二氧化钛粉末; 胶凝
Key words:photocatalysis; nano-meter TiO2 powder; gelation
摘 要:以钛酸丁酯为前驱物、无水乙醇为溶剂 ,在不同反应条件下研究了Sol-Gel法制备纳米二氧化钛光催化剂的胶凝过程。得到了制备稳定溶胶的最佳工艺条件 :前驱物水解是在混合水溶液中进行 ,其混合液由无水乙醇、水和 pH调节剂 (HCl或NH3·H2O)组成 ,并采用滴加式加入 ;钛醇盐与水的摩尔比取 2~3;乙醇与钛醇盐摩尔比m取 5~8;pH值取 1~2;水解温度为 2 0~40℃。
Abstract: The preparation of TiO2 by Sol-Gel method was studied under different conditions using Ti(OBu)4 as presursor and C2H5OH as solvent. The optimum preparation conditions are as follows. Hydrolysis of Ti(OBu)4 is finished in a mixture made of alcohol, water and pH regulators (HCl or NH3·H2O), the affusion way of solution is ditration. The molar ratio of Ti(OBu)4 to water is 2~3. The molar ratio of alcohol to Ti(OBu)4 is 5~8. The pH value of the solution is 1~2. Hydrolysis temperature is 20~40 ℃.