采用溶胶-凝胶法,以钛酸丁酯为前驱体,乙二醇作为螯合剂制备纳米TiO2粒子.考察钛的乙二醇盐的浓度、pH值、温度等因素对TiO2粒径的影响,并用红外光谱和SEM对纳米TiO2粒子进行结构和形貌表征.结果表明,采用溶胶凝胶法可以制备出呈椭圆形且粒径分布均匀的TiO2纳米粒子.使用硝酸铵可以有效阻止TiO2纳米粒子团聚.当pH值为2～3、温度为20 ～ 40℃,钛的乙二醇盐在丙酮中的浓度为0.03、0.05及0.07 M时,粒径分别为150、240及600 nm.
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