磁控溅射制备的Au-TiO_2薄膜的光催化活性和光降解速率常数研究（英文）

Photocatalytic Activity and Photodegradation Rate Constant of Au-TiO_2 Nanofilms by Magnetron Sputtering

在ITO玻璃中采用磁控溅射法制备了Au-TiO_2纳米薄膜, Au-TiO_2纳米薄膜生长于ITO基板表面,在可见光条件下,在亚甲基蓝水溶液中评价Au-TiO_2纳米薄膜的光催化活性。结果表明:贵金属Au的添加显著提高了纯TiO_2纳米薄膜的光催化活性, Au-TiO_2纳米薄膜的光降解速率常数远高于纯TiO_2纳米薄膜的光降解速率常数。

Au-TiO2 nanofilms were prepared on indium-tin oxide glass by magnetron sputtering.The growth of well-aligned Au/TiO2 nanofilms arrays by magnetron sputtering was presented for the first time.The Au/TiO2 nanofilms were grown on the surface of indium tin oxide(ITO) substrates.The photocatalytic activity of the prepared Au-TiO2 nanofilms in an aqueous solution of methylene blue(MB) was evaluated under the irradiation of visible-light.The experimental results show that the use of Au in TiO2 nanofilms improves photocatalytic activity of the MB organic compound significantly in the aqueous solution under the irradiation of visible light,and the photodegradation rate constants of the prepared Au/TiO2 nanofilms for the photodegradation of MB are larger than that of pure TiO2 nanofilms.