单分散二氧化钛球形粒子的制备及表征

Preparation and Characterization of Monodisperse TiO_2 Spherical Particles

以钛酸四丁酯为钛源,乙二醇作为螯合剂,通过溶胶-凝胶法制备了单分散的球形二氧化钛粒子,并通过SEM、XRD、TGA等测试方法对其结构和形貌进行了表征。探讨了水在丙酮中的含量、乙二醇的用量、陈化时间以及煅烧条件等对球形粒子形态的影响。结果表明,将1mL的钛酸四丁酯分散到100mL的乙二醇中,混合均匀后倒入含水的丙酮溶液中(水的体积分数为0.25%),搅拌30min后陈化的方法是制备球形二氧化钛粒子的最佳实验条件。

This paper prepares monodisperse spherical titanium oxide particles with sol-gel method with tetrabutyl titanate as titanium source and ethylene glycol as chelating agent,characterizes its structure and morphology with such test methods as SEM,XRD and TGA and mainly discusses the influence of some factors on the form of spherical particles,such as water content in acetone,dosage of ethylene glycol,aging time and calcination conditions.The result shows that dispersing 1 mL tetrabutyl titanate in 100 mL ethylene glycol,mixing them uniformly,putting them into hydrous acetone solution（volume fraction of water is 0.25％）,stirring for 30 min and then aging them are the best experimental conditions for preparing spherical titanium dioxide particles.