纳米TiO_2粉体制备的影响因素及其结构表征

Influenced Factors on Preparation of Nanometer Titanium Dioxide Powders and Their Structure Characterization

以钛酸四丁酯为前驱物,冰醋酸为螯合剂,盐酸作催化剂,乙醇作溶剂,通过适当控制反应条件和调节反应组分,采用溶胶-凝胶法制备了不同晶型的纳米TiO2,并对纳米TiO2进行一系列测试和表征。扫描电镜与透射电镜照片表明纳米TiO2粒径分布窄、分散性良好;能谱分析结果表明元素组成符合TiO2的成分组成;XRD图谱显示了纳米TiO2在不同温度下发生了晶型转变,即其晶型结构受煅烧温度的影响明显。

Nano-TiO2 powder was prepared via sol-gel route,using TBT as precursor,HAc as chelated reagent,HCl as catalyze,ethanol as solvent,the mechanism of sol-gel route and the influenced preparation factors were discussed.The SEM and TEM microphotoes showed that the size of the nano-TiO2 particles dispersed uniformly and their distribution of particle size was really narrow.EDX results exhibited that the product was what we desired.XRD curves indicated the crystalloid of TiO2 was affected mainly by the calcite temperature.