摘要：

制备了玻璃负载纳米TiO₂/SiO₂光催化膜,以甲基橙溶液作为模拟废水研究了其光催化性能,分别考察了光催化膜中m(TiO₂):m(SiO₂)、膜厚度、使用次数和中试扩大以及再生方式对甲基橙模拟废水降解率的影响。试验结果表明,在太阳光下照射4 h,厚度为200~400 nm的光催化膜对10 mg/L的甲基橙模拟废水降解率为84%,失活的光催化膜可用模拟风、光、酸雨和人工清洗方式再生。纳米TiO₂/SiO₂光催化膜可应用于光催化水处理设备、建筑易清洁玻璃和太阳电池玻璃。

关键词: 纳米TiO₂, TiO₂/SiO₂膜, 光催化

Abstract:

The glass-loaded Nano-TiO₂/SiO₂ photocatalytic film has been prepared.Its photo-catalytic capacity is studied with methyl orange solution as simulated wastewater.The influences of the mass ratio of TiO₂ to SiO₂ in the film,thickness of the film,serving times,pilot scale extension and regenerating modes on the degrading rate of stim-ulated methyl orange wastewater are investigated,respectively.The experimental results show that under sunlight irradiation for 4 h,the degrading rate of the 10 mg/L of methyl organic simulated wastewater by the photo-catalytic film with a thickness of 200-400 nm is 84%.The deactivate film could be regenerated by simulated wind,sunlight,acidic rain or manual cleaning.Nanometre TiO₂/SiO₂ film can be applied to photocatalytic water treatment equipment,self-cleaning glass on buildings and solar cell glass.

Key words: nano-TiO₂, TiO₂/SiO₂ film, photocatalysis

中图分类号: 

• X703.1