溶胶-凝胶法制备TiO_2薄膜及其光催化性能的研究

The TiO_2 Thin Films Prepared with Sol-gel Method and Test of its Photocatalysis

通过溶胶-凝胶法制得溶胶-凝胶溶液,采用浸渍-提拉法制备纳米二氧化钛薄膜,制得的薄膜在500℃热处理1h。用X-射线衍射仪测定TiO2的纳米薄膜的物相组成,经图峰鉴定证明TiO2为锐钛矿型。用扫描电镜观察薄膜的表面形貌,发现其表面均匀分布着颗粒直径为20nm左右的TiO2球形颗粒。用制得的薄膜对铬黑T水溶液和甲基橙水溶液进行光催化,实验结果表明,制得的二氧化钛薄膜有较高的光催化活性。

Nanometer TiO2 thin-film was prepared with Sol-gel method, and dried at 500℃for 1 h. The TiO2 thin-film was measured by X-ray diffractometer and SEM, and the results showed that the crystalline phase of TiO2 was anatase, the surface of thin-film was smooth. The diameter of TiO2 corpuscle was about 20 nm. An obvious peak can be seen using UV-Vis Spectra. The aqueous solutions of eriochrome black T and methyl-orange were chosen to test the photocatalysis of TiO2 nanometer thin-film, and the results were good.