湿法水解制备可见光催化剂N/TiO_2  

Preparation of Visible-light Photocatalyst N/TiO_2 by Wet Hydrolyzation Method

作　　者：王永强[1] 于秀娟[1] 孙德智[1] 杨红芬[1] 明琪[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《无机化学学报》2006年第7期1349-1353,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助项目(No.50378027)

摘　　要：The N/TiO2 was prepared by wet hydrolyzation method. The photocatalytic decomposition of benzoic acid solution was carried out under simulated sun light; the photocatalytic activity was 2.47 times of TiO2. The products were characterized by XRD, SPS, EFISPS and XPS, respectively. The results of XRD showed that the N could restrain the crystallization transformation of TiO2 from anatase to rutile. The N/TiO2 was still n-type semiconductor, and the absorbance wavelength appeared red-shifted by N-doping. The band gap of N/TiO2 was decreased to 2.7 eV. The amount of doped-N is about 0.94at.%. The binding energy of N1s are 396.62 eV (Ti-N bonds, β-N) and 400.87 eV (N-N bonds, γ-N2), respectively, and the photocatalytic activity of N/TiO2 under visible light is related to the β-N. The N atoms replace the O of the TiO2 and form the Ti-N bonding.The N/TiO2 was prepared by wet hydrolyzation method. The photocatalytic decomposition of benzoic acid solution was carried out under simulated sun light; the photocatalytic activity was 2.47 times of TiO2. The products were characterized by XRD, SPS, EFISPS and XPS, respectively. The results of XRD showed that the N could restrain the crystallization transformation of TiO2 from anatase to rutile. The N/TiO2 was still n-type semiconductor, and the absorbance wavelength appeared red-shifted by N-doping. The band gap of N/TiO2 was decreased to 2.7 eV. The amount of doped-N is about 0.94at.%. The binding energy of Nls are 396.62 eV （Ti-N bonds,β-N） and 400.87 eV （N-N bonds, y-N2）, respectively, and the photocatalytic activity of N/TiO2 under visible light is related to the β-N. The N atoms replace the O of the TiO2 and form the Ti-N bonding.

关 键 词：湿法水解 光催化 可见光 氮掺杂 

分 类 号：O643.36[理学—物理化学] O614.411[理学—化学]