The Preparation And Photocatalytic Properties Of New Structure Nanometer Titanium Dioxide

With the development of industry, water and air are seriously polluted, which threatens people's health and economics. Therefore, it is important to eliminate the deleterious substances in water and air.TiO₂ is a wide-band semiconductor which is very steady, poisnless ,and effective in eliminating pullutants in water and atmosphere. TiO₂ has already attracts the interest of scientist and is supposed to be a satisfied and promising material.However, TiO₂ can only absorb Ultraviolet light with the wavelength that is shorter than 387nm(λ< 387nm),while most visible light which composes 95% of solar light cannot be utilized.Therefore, it is important to shorten the band gap of TiO₂ and lengthen the spectra response in order to improve the utilization of the solar energy.This article focuses on the visible research from the doping of nonmetal ion and the composition of semiconductor.The photodegradation of chlorophenol was employed to evaluate the activities of the catalysts.The crystal structure, surface properties and bandgap of these...