The Yb3+-Er3+/TiO2 photocatalyst with different amount doped Yb3+-Er3+ and different calcination temperatures were synthesized by sol gel method, and characterized by SEM 、XRD and FT-IR . Methylene blue experiment was chosen to evaluate photocatalyst’s activity.The results showed that the synthesized samples were anatase nanometer TiO2, with the Yb3+-Er3+ doped, which indicating that Yb3+-Er3+ doped rare earth can refine the grain.Photocatlytic experiment result showed when calcined at 400℃, Yb3+-Er3+/TiO2 molar ratio of 2% and added 1mL30%H2O2,irradiated without lighting 6h, the degradation rate could be 95%.
