微波辐射法研制复合半导体光催化材料TiO2/ZnO

采用微波辐射法制备了复合型半导体光催化材料TiO2/ZnO,利用X射线衍射(XRD)测试技术对TiO2/ZnO复合型半导体光催化材料进行了表征。用甲基红模拟有机废水,在高压汞灯模拟日光光照的条件下,研究了复合型半导体光催化材料TiO2/ZnO光催化降解有机废水的过程,并在相同的条件下,与机械研磨法制备的复合型半导体光催化材料TiO2/ZnO的光催化性能进行了对比实验。研究结果表明,微波辐射法制备的复合型半导体光催化材料TiO2/ZnO具有很好的光催化性能,TiO2/ZnO投加量为0.5g.L-1时,其具有良好的光催化脱色性能,经1h光照,对甲基红的光降解效率可以达到100%。随着溶液初始浓度增加,甲基红的降解率增大。

Preparation of TiO2/ZnO coupled-semiconductor photocatalyst by microwave irradiation method

The TiO2/ZnO was prepared by microwave heating method.Microstructure and catalytic properties of TiO2/ZnO were studied by using XRD and reaction test of photocatalytic degradation of methyl orange in solution.Using titania dioxide as activator,methyl red simulating waste water,and high voltage mercury lamp simulating sunlight,the degradation of methyl red by photocatalysis was studied and compared with that of TiO2/ZnO which was prepared by rubbing.The results indicated that TiO2/ZnO prepared by microwave heating method has the best photocatalytic properties.After 60 min illumination,at the recruitment of TiO2/ZnO was 0.5g/L,the decolouration rate of the methyl red could be arrived 100%.as the increase of initial concentration,the degradation ratio of methyl red was increased.