以硫酸钛为钛源,浓氨水为沉淀剂,通过水热法水解合成TiO2.利用XRD、SEM和TEM对试样进行分析,结果表明:当硫酸钛溶液水解时不加入浓氨水,随着水解时间的延长,获得的锐钛矿型TiO2颗粒的粒径没有明显的变化；当硫酸钛溶液水解时加入浓氨水,合成锐钛矿型TiO2颗粒的粒径明显变小,在240℃、48.0h和pH =9.0条件下水热法合成了方形或者近椭圆形的TiO2,分散性较好,其颗粒粒径约为20nm.对不同条件下水热法合成的TiO2,进行UV - VIS分析,其锐钛矿型TiO2颗粒粒径的变小有利于TiO2吸收峰的蓝移.
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