Abstract：Nanometer TiO2 and Cu2+/TiO2 composite material was prepared by the sol-gel method. During the process of preparing the antibacterial TiO2 and Cu2+/TiO2, with various contents of Ti(SO4)2 and copper ion, a series of TiO2 sol and Cu2+/TiO2 sol were obtained. They were characterized with the laser diffraction particle size analyzer, XRD and TEM. The results show that the size of TiO2 grains ranges in 3.9~97.9nm, with an effective diameter of 63.6nm and a polydispersity of 0.222. The effective diameter of Cu2+/TiO2 is 58.4nm, with the polydispersity of 0.237. The TiO2 was anatase, and the diameter of Cu2+/TiO2 sol is slightly smaller than that of TiO2, but the performance against photodegradation may be better than TiO2 sol. TiO2 and Cu2+/TiO2 are compared by the catalytic degradation of methyl blue to see the impact of the polymerize reaction time, surfactant, light source, Cu2+/TiO2 film and the concentration of copper ion on the photo-catalytic of TiO2. Our experiments show that Cu2+/TiO2 sol has better photocatalytic activity than TiO2 sol, with the optimal concentration of copper ion of 0.5%.
2010, Vol. 28 
