The Effect of Calcination Temperature,Calcination Time and Fe~(3+)-doped Amount on the Photocatalytic Activity of TiO_2

Pure and Fe3+-doped TiO2 nanoparticle photocatalysts are prepared by the sol-gel method using Ti-(OC4H9)4 as precursor,and it is characterized by X-ray diffraction(XRD) and UV-Vis. The effect of calcination temperature,calcination time and Fe3+-doped amount on the photocatalytic activity of TiO2 are investigated by photocatalytic degradation of methyl orange irradiated by sunlight. The optimal calcination time for pure TiO2 and Fe3+-doped TiO2 is 4h and 3h,respectively. The optimal calcination temperature is 773K for both pure TiO2 and Fe3+-doped TiO2. The amount of Fe3+-doped can remarkably increase the catalytic activity of TiO2 under nature light irradiation,the optimal amount of Fe3+ in Fe3+-doped TiO2 is 10.00%,and the corresponding decolorization efficiency is 28.37%.