Preparation and Photocatalytic Activities of Nb2O5/TiO2 Composite Nano-Powders
Pure and Nb2O5-depoed TiO2 namo-particles were prepared at 540℃ for 4h by sol-gel method and characterized with XRD.The effects of the amount of Nb2O5-depoed for photocatalytic degradation of methylene blue in solution, phase structure and crystallite size of the namopowders were investigated. The mechanism of the effects of Nb2O5-doping on the photocatalytic activity of TiO2 was discussed in relation ship between the crystal structure and its photocatalytic activity. The results show that 10 ％ Nb2O5-doped can significantly enhance the photocatalytic activity of TiO2 nomo-particles, the mass prcent of rutile phase was 6.07％ , its degradation percent is 87.5％ and crystalline sizes is about 31nm.The presence of Nb2O5-depoed in TiO2 can inhibit the phase transformation from anatase to rutile and suppress the growth of TiO2 grains, which resulted in increase in the photoactivity.
Nano-sized titania Nb2O5-doping Crystallite size Sol-gel process Photocatalytic activity
Lu Xudong Zhang Xingming Wei Shouqiang
Equipment Engineering College, Shenyang, Ligong University, Shenyang, Liaoning 110168, China No.6, Manping Middle Road, Hunnan District, Shenyang, 110168, China
国际会议
沈阳
英文
136-138
2009-08-27（万方平台首次上网日期，不代表论文的发表时间）