LI Guihua

(Faculty of Chemistry and Material, Langfang Teacher's College, Langfang Hebei 065000,China)

Abstract: Ce, Fe and Co co-doped mixed-crystal TiO₂ nanoparticles were prepared via sol-gel process and characterized by XRD. Their decolorization performance of methylene blue under fluorescent lamp was investigated. Influence of dopingamount, roasting temperature, roasting time and catalyst concentration on their photocatalytic performance were studied.The results indicated that Ce, Fe and Co co -doped TiO₂had more rutile phase than pure TiO₂ and exhibited higher photocatalytic activity. Ce_0.0625Fe_0.025Co_0.002/TiO₂ roasted at 500℃ for 2h showed the highest photocatalytic efficiency. When the catalyst concentration was 0.4g/L the degradation rate of methylene blue for 2h could reach 95.6%.

Keywords: mixed-crystal; TiO₂ nanoparticles; co-doping, photocatalysis