飞秒激光加工Ag-TiO_(2)微纳结构及其光催化性能研究

Photocatalytic performance of Ag-TiO_(2) micro/nanostructures fabricated by femtosecond laser

为了提高TiO_(2)在太阳光下的催化性能,采用真空蒸镀法在金属钛表面蒸镀Ag膜,并结合飞秒激光做一步加工,同步实现了微纳结构TiO_(2)的生成与Ag粒子的复合,取得了具有良好太阳光催化性能的掺Ag的TiO_(2)表面。结果表明,经300min模拟太阳光辐照,掺杂Ag的TiO_(2)微纳复合材料对亚甲基蓝的降解率为70%,是具有同样结构的TiO_(2)材料的1.5倍;这种基于体材料直接加工的方法可以提高比表面积,解决传统TiO_(2)分散性高、难回收的问题;利用这种方法制备的结构化掺杂Ag的TiO_(2)材料在模拟太阳光照下光催化性能得到显著提升。这一结果对制备环保高效的TiO_(2)光催化剂具有重要的潜在应用价值,并有望应用于工厂大规模快速生产。

To improve the catalytic effect of titanium dioxide under solar light,a silver film was deposited on the titanium surface by the vacuum evaporation method,and a femtosecond laser was used for the fabrication of the micro/nanostructured titanium dioxide and the incorporation of silver particles simultaneously.The results show that the photocatalytic efficiency of the Ag-TiO_(2) for removal of methylene blue is as high as 70%under simulated sunlight for 300min,which is 1.5 times of the photocatalytic efficiency of structured TiO_(2).This method based on direct processing of bulk materials can increase the specific surface area and solve the problems of traditional titanium dioxide’s recycling.Therefore,this technology shows high potential in the fabrication of environment-friendly titanium dioxide photocatalyst with high efficiency and large-scale and rapid production in factories.