Abstract: Ce-Fe co-doped TiO_2 nanopaticles were prepared via Sol-gel process and their decolorization performance of methylene blue under energy saving lamp were investigated. The effects of catalyst composition,catalyst concentration and reaction temperature on their photocatalytic performance were studied. The results indicated that Ce-Fe co-doped TiO_2 showed markedly higher photocatalytic activity than that of TiO_2 and Ce or Fe single doped TiO_2. TiO_2 co-doped with 0.0625% Ce and 0.004% Fe showed the highest photocatalytic efficiency. And using this catalyst when the catalyst concentration was 0.313 g/L,the reaction temperature was 50 ℃ and pH was 5.33 the degradation rate in 4 h could reached 96.00%. XRD characterizing indicated that emulsion of anatase and rutile had better photocatalytic activity and their diameters were between 20 to 30 nm.

Key words: Sol-gel%TiO_2 nanopaticles%co-doping%photocatalysis%methylene blue