Abstract:

Cu-Ce/TiO₂ has been prepared by sol-gel method. Taking the photocatalytic degradation rate of formalde- hyde solution as an evaluating indicator, the preparation conditions of Cu-Ce/TiO₂ are optimized by L₁₆(4⁵) orthogonal experiment, and the structure of the product is characterized. The results show that the order of influence degree of each factor on the photocatalysis degradation of Cu-Ce/TiO₂, is as follows:Cu-Ce-doped loading>n(Cu): n(Ce)> sintering temperature. The best preparation conditions are as follows:Cu-Ce-doped loading is 3%, n(Cu):n(Ce)=1:1 and sintering temperature 550 ℃。 The Cu-Ce/TiO₂ prepared under the best preparation conditions has been used for the photocatalytic degradation of formaldehyde solution under visible light. The formaldehyde degradation rate reaches 56.35% in 240 min.

Key words: TiO₂, sol-gel method, formaldehyde solution, photocatalytic activity, Cu-Ce

摘要：

采用溶胶-凝胶法合成Cu-Ce/TiO₂,以制备的Cu-Ce/TiO₂对甲醛溶液的光催化降解率为评价指标, 通过L₁₆(4⁵)正交实验对制备条件进行了优化, 并对产物的结构进行了表征。结果表明:各因素对Cu-Ce/TiO₂光催化降解效果的影响大小依次为Cu-Ce掺杂负载量 >n(Cu):n(Ce)>烧结温度;最佳制备条件:Cu-Ce掺杂负载量为3%,n(Cu):n(Ce)为1:1,烧结温度为550 ℃;以最佳条件下制备的Cu-Ce/TiO₂于可见光条件下光催化降解甲醛溶液, 经过240 min后, 甲醛降解率达到56.35%.

关键词: TiO₂, 溶胶-凝胶法, 甲醛溶液, 光催化活性, Cu-Ce

CLC Number: 

• O472+.1

• X703