Abstract: The nano TiO2 powder doping dysprosium were prepared by sol-microwave method using tetrabutyl titanate and dysprosium nitrate as material . Methyl orange solution was chosen as the degradation product , the effects of calcining temperature , calcining time,doping amount on photocatalytic activity of nano TiO2 powder and properties were investigated .The samples were analyzed by XRD , SEM, UV-vis-DRS, et al.The results show doping Dy content is 1.3%of Nano TiO2 powder calcined at 550 ℃ for 4 h, the degradation efficiency reaches 90%.Not only maded nano TiO 2 particle size decreased , the bandgap reduced and absorption wavelength red shifted about 30 nm, but also effectively inhibited the electron hole-pairs complexing .

Key words: Dy doping;photocatalysis;TiO2;sol-microwave method