| Materials with nanostructures have attracted great interest in recent years because their special characteristics and performances. TiO2, an exceptionally important material for application in photocatalysis, ceramic material, fillers, coatings, pigments, gas sensors and cosmetics, has been attracting attention in both fundamental research and practical development work. Because of its low cost, high photocatalytic activity and chemical stable properties, the preparation of TiO2 with high activity and elucidation of its formation mechanism have spurred great interests.In this work, TiO2 with high photocatalytic activity were prepared by different methods such as sol-gel techniques in the presentation of different templates. The acetic acid was used as inhibitor to hydrolyzation and ethanol was used as solvent. The doping of TiO2 with Zirconium was also investigated and its effect on the photocatalytic acitivity of TiO2 was determined. The structures of the samples were analysized by XRD, TEM, TG-DTA, FT-IR, BET-BJH, XPS, etc and also the photocatalytic activity of all samples was determined by using as a model reaction. The results show that polyethylene glycol (PEG) can prevent the agglomeration of TiO??+→e2I2I22 and the sample with particle size of 10nm, specific surface area of 93 m2/g can be produced by adding PEG as templates.The products showed higher activity than P25 which has been considered as photocatalyst with high activity traditionally.When using PEG and cetytrimethylammonium Bromide (CTAB) as complex templates, more active TiO2 catalyst was prepared and its mechanism was elucidated by FT-IR analysis. In addition, the doping of TiO2 with Zirconium showed the effect of increasing the activity of catalyst and did not show obvious effect in changing the crystal structure in the scope that the content of Zirconium in TiO2 was less than 8%.
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