LI Chengqiang

(School of Materials Science and Engineering, Beihang University, Beijing 100191, China)

Abstract: Nano-CeO₂-TiO₂ mixed oxides were synthesized by solvothermal method with different molar ratio of Ce : Ti. The samples were characterized by X-ray diffraction (XRD) and N₂ sorption. The photocatalytic performances of the powders were evaluated by using acid orange 7 (AO7) as degradation agent. The result shows that CeO₂-TiO₂ mixed oxide possesses an efficient and fast photocatalytic performance. The degradation ratio of AO7 in the presence of CeO₂-TiO₂ mixed oxide with Ce : Ti (mol.) = 1 : 1 can reach 88.5%, irradiated by a 100 Watt high-pressure mercury lamp for 50min,however, the degradation of AO7 only reached 62.5% by single phase TiO₂.

Key words: solvothermal synthesis; CeO₂-TiO₂; photocatalysis; acid orange 7