Abstract：Fe3+ doped nano-TiO2 were prepared by hydrothermal method using butyl titanate and Fe(NO3)3·9H2O as precursor.X-ray Diffraction(XRD),Transmission Electron Microscope(TEM) and UV-Vis Absorbance Spectroscopy were used to characterize the products.The photocatalytic activity of Fe3+ doped nano-TiO2 at the different amount of catalyst and pH values on the degradation of methylene blue(MB) were studied under 300W halogen tungsten light.The results show that the photocatalytic activity of Fe3+ doped nano-TiO2 is better at alkaline condition and the best amount of Fe doped nano-TiO2 is 1.0g/L.The band gap of Fe doped nano-TiO2 become narrow and the absorption red-shifted and the absorption intensities increased.At the same time,the recombination of e-/h+ was inhibited,so the photocatalytic activity of Fe doped nano-TiO2 are enhanced.
 MIXHAEL R H.SCOT T M,CHOI W Y,et al.Environmental applications of semiconductors[J].Chem Rev,1995,95:69-96.  AMY L L.LU G Q,JOHN T Y.Photocatalysis on TiO2 surfaces:principles,mechanisms,and selected results[J].Chem Rev,1995,95:735-758.  THOMPSON T L,YATES J T.Surface science studies of the photoacativation of TiO2-new photochemical processes[J].Chem Rev,2006,106:4428-4458.  TAHAsHl T,MAMORU F.TETSURO M.Mechanistic insight into the TiO2 photocatalytic reactions:design of new photocatalysts[J].J Phys Chem C,2007,111:5259-5275.  CHO I W.The role of met al Ion dopantized TiO2:correlation between photo-reactivity and charge carrier recombination dynamics[J].J Phys Chem,1994,98:1791-1813.  NAVIO J A,CCLON Gt TRILLAS M.Heterogeneous photocatalysis reactions of nitrite oxidation and Cr(Ⅳ)reduction on Irondoped titantia prepared by the wet impregnation method[J].Appl Catal B.1998,16:187-196.  NAVIO J A,TESTA J J,DJEDJEIAN P,et al.Iron-doped titantia powders prepared by a sol-gel method.Part Ⅱ:photocatalyric properties[J].Appl Catal A,1999,178:191-203.  陈晓青,杨娟玉,蒋新宇,等.掺铁TiO2纳米微粒的制备及光催化性能[J].应用化学,2003,20:73-76.  TONG T Z,ZHANG J L,TIAN B Z,et al.Preparation of Fe3+-doped TiO2 catalysts by controlled hydrolysis of titanium alkoxide and study on their photocatalytic activity for methyl orange degradation[J].J Hazardous Mater,2008,155:572-579.  侯莉.孙佳佳,刘宽,等.Fe3+掺杂TiO2溶胶-凝胶法合成及其光催化性能研究[J].硅酸盐通报,2005,3:46-48.  AMBRUS Z,BALAZS N,ALAPI T.et al.Synthesis,structure and photocatalytic properties of Fe(Ⅲ)-doped TiO1 prepared from TiCl3[J].Appl Catal B:Environ,2008,81:27-37.  LI Z J,SHEN W Z,HE W S,et al.Effect of Fe-doped TiO2 nanoparticle derived from modfried hydrothermal process on the photocatalytic degradation performance on methylene blue[J].J Hazardous Mater,2008,155:590-594.  WANG J,SUN W,ZHANG Z H,et al.Preparation of Fe-doped mixed crystal TiO2 catalyst and investigation of its photocatalytic activity during degradation of sunshine under ultrasonic irradiation[J].J Colloid and Interlace Sci,2008,320:202-209.  谭小伟,高家诚.邹建,等.不同晶型的纳米TiO2粉体的低温制备及光催化性能研究[J].兵器材料科学与工程,2007,30:27-31.  CHOI W Y,TERMIN A,HOFFMANN M R.et al.The role of met al ion dopants in quantum-sized TiO2:correlation between photoreactivity and charge carrier recombination dynamics[J].J Phys Chem,1994,98:13669-13679.