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Visible light induced photodegradation of organic pollutants on nitrogen and fluorine co-doped TiO2 photocatalyst
作者姓名:WANG Zheng-peng  XU Jun  CAI Wei-min  ZHOU Bao-xue  HE Zheng-guang  CAI Chun-guang  HONG Xiao-ting
作者单位:SchoolofEnvironmentalScienceandEngineering,ShanghaiJiaotongUniversity,Shanghai200240,China
摘    要:The nitrogen and fluorine co-doped TiO2 polycrystalline powder was synthesized by calcinations of the hydrolysis product of tetrabutyl titanate with ammonium fluoride. Nitrogen and fluorine co-doping causes the absorption edge of TiO2 to shift to a lower energy region.The photocatalytic activity of co-doped TiO2 with anatase phases was found to be 2.4 times higher than that of the commercial TiO2 photocatalyst Degussa P‘25 for phenol decomposition under visible light irradiation. The co-doped TiO2 powders only contain anatase phases even at 1000%. Apparently, ammonium fluoride added retarded phase transformation of the TiO2 powders from anatase to futile.The substitutional fluorine and interstitial nitrogen atoms in co-doped TiO2 polycrystalline powder were responsible for the vis light response and caused the absorption edge of TiO2 to shift to a lower energy region.

关 键 词:光降解作用  可见光  有机污染物      二氧化钛  光催化剂  环境保护
收稿时间:3/4/2004 12:00:00 AM
修稿时间:6/7/2004 12:00:00 AM

Visible light induced photodegradation of organic pollutants on nitrogen and fluorine co-doped TiO2 photocatalyst
WANG Zheng-peng,XU Jun,CAI Wei-min,ZHOU Bao-xue,HE Zheng-guang,CAI Chun-guang,HONG Xiao-ting.Visible light induced photodegradation of organic pollutants on nitrogen and fluorine co-doped TiO2 photocatalyst[J].Journal of Environmental Sciences,2005,17(1):76-80.
Authors:WANG Zheng-peng  XU Jun  CAI Wei-min  ZHOU Bao-xue  HE Zheng-guang  CAI Chun-guang and HONG Xiao-ting
Institution:School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China
Abstract:The nitrogen and fluorine co-doped TiO2 polycrystalline powder was synthesized by calcinations of the hydrolysis product of tetrabutyl titanate with ammonium fluoride. Nitrogen and fluorine co-doping causes the absorption edge of TiO2 to shift to a lower energy region.The photocatalytic activity of co-doped TiO2 with anatase phases was found to be 2.4 times higher than that of the commercial TiO2photocatalyst Degussa P25 for phenol decomposition under visible light irradiation. The co-doped TiO2 powders only contain anatase phases even at 1000℃. Apparently, ammonium fluoride added retarded phase transformation of the TiO2 powders from anatase to rutile.The substitutional fluorine and interstitial nitrogen atoms in co-doped TiO2 polycrystalline powder were responsible for the vis light response and caused the absorption edge of TiO2 to shift to a lower energy region.
Keywords:photocatalyst  visible light  nitrogen and fluorine co-doped  phenol  band gap  
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