Abstract:

SnO₂/ZnO composite thin film has been prepared by sol-gel method on glass plate/aluminum foil. The photocatalystic degradation capacity of SnO₂/ZnO composite thin film has been studied under visible light,using aqueous solution of methyl orange as simulated organic pollutant. The results show that the degradation efficiency by using aluminum foil as carrier is obviously higher than that by using glass plate as carrier. When the mass concentration of SnCl₄ in sol is 0.05 g/mL,the degradation efficiency of SnO₂/ZnO/aluminum foil is the highest. Under the illumination of UV for 2 h,the degradation efficiency is 98.91%,while under the illumination of visible light is 82.62%.

Key words: sol-gel method, SnO₂/ZnO thin film, photocatalytic degradation, methyl orange

摘要：

采用溶胶-凝胶法在玻璃片/铝箔上制备SnO₂/ZnO复合薄膜,以甲基橙水溶液模拟有机污染物,在可见光及紫外光下研究了SnO₂/ZnO薄膜的光催化降解性能。实验结果表明:以铝箔为载体比以玻璃为载体时降解效率要有明显提高;当SnCl₄在溶胶中的质量浓度为0.05 g/mL时,SnO₂/ZnO/铝箔的降解效率最高;光照2 h时,在紫外光照射下降解效率为98.91%,可见光照射下降解效率达到了82.62%。

关键词: 溶胶-凝胶法, SnO₂/ZnO薄膜, 光催化降解, 甲基橙

CLC Number: 

• X703.1