关键词: Ce-TiO2;介孔纳米材料;水热法;光催化剂

Abstract: The precursor of Ce-Ti metal organic material was synthesised by the hydrothermal method using Ce(NO3)3·6H2O, Citric acid, tetrabutyl titanate (IV) and 2-hydroxy terephthalic acid and N, N-dimethylformamide as raw materials.A series of mesoporous nanocomposites Ce-TiO2 with high specific surface area were obtained by different sintering temperatures.The structures and properties of the composites were characterized by XRD, SEM, BET, TG, UV-vis DRS and UV absorption spectroscopy.The results show that the photocatalyst calcinated at 1000 ℃ (CTOF-P10) exhibits excellent photocatalytic properties.The first-order kinetic constant of the degradation of methylene blue (MB) is 2.15 times higher than that of commercial TiO2 (P25).The introduction of Ce ions plays the role of doping, it's preventing the growth of TiO2 grains, and also inhibits the recombination of photogenerated electrons and holes.Consequently, the photocatalytic activity of the synthetic catalyst is dramatically enhanced.

Key words: The precursor of Ce-Ti metal organic material was synthesised by the hydrothermal method using Ce(NO3)3·6H2O, Citric acid, tetrabutyl titanate (IV) and 2-hydroxy terephthalic acid and N, N-dimethylformamide as raw materials.A series of mesoporous nanocomposites Ce-TiO2 with high specific surface area were obtained by different sintering temperatures.The structures and properties of the composites were characterized by XRD, SEM, BET, TG, UV-vis DRS and UV absorption spectroscopy.The results show that the photocatalyst calcinated at 1000 ℃ (CTOF-P10) exhibits excellent photocatalytic properties.The first-order kinetic constant of the degradation of methylene blue (MB) is 2.15 times higher than that of commercial TiO2 (P25).The introduction of Ce ions plays the role of doping, it's preventing the growth of TiO2 grains, and also inhibits the recombination of photogenerated electrons and holes.Consequently, the photocatalytic activity of the synthetic catalyst is dramatically enhanced.