纳米TiO_2的溶胶凝胶法制备与性能

Properties of Nanometer TiO_2 Prepared by a Sol-Gel Method

以钛酸丁脂、无水乙醇、冰醋酸为原料,以无水焦磷酸钾、六偏磷酸钠为分散剂,采用溶胶-凝胶法制备了纯相锐钛矿型纳米TiO_2粉体,TEM照片及XRD衍射峰宽化计算显示粉体的粒径在25~40 nm;纯相锐钛矿型纳米TiO_2粉体在波长为280~380 nm区的紫外线有较好的屏蔽性,在可见光区有较好的透过性,可以被用来制作低成本高性能的紫外屏蔽材料。

The pure anatase phase nanometer TiO_2 powder was prepared by a sol-gel method using tetrabutyl titanate, absolute ethyl alcohol and glacial acetic acid as starting materials, and using anhydrous potassium pyrophosphate and sodium pyrophosphate as dispersants. TEM micrographs and XRD results show that the particle size is between 25 and 40 nm. The pure anatase phase nanometer TiO_2 powder exhibits good ultraviolet shielding properties in a wavelength range of 280~380 nm and good permeability in the visible region, which can be used to prepare ultraviolet shielding materials with low cost and high performance.