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探讨了文题的方法,研究了反应物浓度、搅拌速率、溶剂与底物类型对水解速率与粒子性能的影响规律。粒子平均直径D_V随着反应底物浓度的增加而增加,随着水浓度增加而降低,粒径分散度GSD随着底物和水浓度增加而变窄;搅拌强度增大,D_V增加,分布变宽;溶剂中配位基电负性愈低,D_V愈大,当溶剂与反应底物中的配位基相同时,GSD最佳。底物中配位基的电负性愈高,其水解动力学稳定性愈差,D_V愈小。实验制备的TiO_2超细粒子为无定形态,球状,D_V=100～400nm,CSD=1.1～1.4,且化学纯度高。
The paper discusses the method of reactant concentration, stirring rate, solvent and substrate type on the hydrolysis rate and particle properties of the law. The average particle diameter D_V increased with the increase of substrate concentration and decreased with the increase of water concentration. The particle size dispersion GSD narrowed with the increase of substrate and water concentration. The agitation intensity increased, D_V increased, The lower the electronegativity of the ligand in the solvent, the larger the D_V. When the ligands in the solvent and the reaction substrate are the same, the GSD is the best. The higher the electronegativity of the ligand in the substrate, the poorer the hydrolytic kinetic stability is and the smaller the D_V is. The ultrafine TiO 2 particles prepared in the experiment are amorphous, spherical, D_V = 100-400 nm, CSD = 1.1-1.4, and have high chemical purity.