The Research Of Preparation Of Fe～(3+) Doped Nano-titanium Dioxide And Its Photocatalytic And Antibacterial Properties

With the progress of our society and advancement of living standard, people are paying more and more attention to the healthy environment where they live. Much research has been done on the photocatalytic properties of TiO₂ since the metaphase of 1970s. Taking advantage of TiO₂ to remove and degrade pollutants has become a very active research direction in the field of environment science. The article introduce systematically the development about nanometer material, photocatalytic oxidation and disfection and antibacterial material. Analyzes the TiO₂ preparation methods, the disfection mechanisms, the new antibacterial application development, and the factors of photocatalytic efficiency. Discusses the sol-gel preparation and improvement of photocatalytic activity.In the experiment, the stable TiO₂ gel was prepared by sol-gel method with Ti(OC₄H₉)₄. The effects of preparation conditions such as stabilizer, catalyst, the heat treatment and amount of coupled Fe³⁺ were investigated. Firm transparent anatase TiCO/glass thin films with nano-crystalline have been prepared by the sol-gel processing. The samples were analyzed and tested by XRD, TG-DSC, SEM, UV-vis methods. The TiO₂ photocatalytic activity was determined by disinfection experiment. Still further, the research work was described in detail as the following aspects:(1) The preparation of pure TiO₂, with the Fe³⁺ doped of TiO₂and TiO₂/glass thin filmsThe main component of the prepared solution contained of Ti(OC₄H₉)₄, which served as precursor to prepare homogeneous and transparent solution. With different ratio of water, C₄H₉OH, Fe₂(SO₄)₃, catalyst, stabilizer were got. Moreover we concluded the best sol-gel process parameters and prepared a series of TiCVglass with dipping -liftting methods.(2) The degradation of organism by the pure TiO₂ and the Fe³⁺ doped of TiO₂Photocatalytic degradation of methylene-blue by pure TiO₂ and the Fe³⁺ doped of TiO₂ was studied under different conditions. The effect of the amount of coupled Fe³⁺, calcination temperature, calcination time and the layers of plating film were investigated. And concluded the best process parameters.(3) The research of pure TiO₂ and the Fe³⁺ doped of TiO₂ antibacterial activityThrough the bacterial killing rate, studied the antibacterial effect. The effects of antibacterial conditions of Escherichia coli, Staphylococcus aureus and Bacillus subtilis vra. niger were investigated, such as the amount of coupled Fe³⁺, different time of sterilize, different lamp-house.(4) The structure and properties of pure TiC>2 and the Fe3+ doped of TiC>2The samples structure was analyzed by XRD, TG-DSC, SEM, UV-vis methods. We confirm the heat treatment of TiC>2 gel according to DSC. The phase transition (Anatase ^*Rutile) depended obviously on the calcination temperature...