HUANG  Xinyou, DENG  Yuehuan ,LI Xiaoyi

(School of Materials Science and Engineering，Jiangsu University，Zhenjiang Jiangsu 212013,China )

Abstract:ZnO/SnO₂ nanocomposites were prepared by coprecipitation method with SnCl₄·5H₂O, ZnNO₃·6H₂O, HCl and NaOH as raw materials, and characterized by TG-DSC, XRD and TEM. The photocatalytic activity of the nanocomposites with different ZnO/SnO₂ ratios and calcined at different temperatures was observed in their degradation of methyl orange. The results showed that the photocatalytic activity of ZnO was increased significantly when compounded with SnO₂, and when the ratio of ZnO:SnO₂ was 4:1, the photocatalytic activity of the nanocomposite was the best; the nanocomposite calcined at 650 ℃ for 2h had the best performance.

Keywords:nanometer ZnO/SnO₂ powder, photocatalytic, coprecipitation, methyl orange