实验以钛酸正丁酯为前驱体,采用溶胶凝胶法制备二氧化钛。设计正交试验,考察水、乙醇、冰醋酸、pH值和凝胶温度对凝胶时间和状态的影响。对凝胶时间的影响程度依次为:pH值、乙醇量、凝胶温度、冰醋酸量、水量。确定溶胶凝胶法合成二氧化钛最佳条件为:pH值为2~3、乙醇的量22~28mL、凝胶温度为55~65℃、冰醋酸的量1.75~2.5mL、水的量2.0~2.5mL。 In the experiment, n-butyl titanate was used as precursor and titania was prepared by sol-gel method. Orthogonal experiments were designed to investigate the effect of water, ethanol, glacial acetic acid, pH and gel temperature on the gel time and state. The order of influence on gel time is: pH value, ethanol amount, gel temperature, glacial acetic acid amount and water amount. The optimal conditions for the synthesis of titanium dioxide by sol-gel method are as follows: the pH value is 2~3, the amount of ethanol is 22~28 mL, the gelation temperature is 55~65 ° C., the amount of glacial acetic acid is 1.75~2.5 mL, the amount of water is 2.0~2.5 mL.