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Study on the Preparation and Performance of Titanium Dioxide Film

Author: WangHong
Tutor: ZhuZhiQing；QianJin
School: East China University of Science and Technology
Course: Chemical Engineering
Keywords: TiO2 films Photocatalytic Degradation Hydrophilic
CLC: TB383.2
Type: Master's thesis
Year: 2010
Downloads: 20
Quote: 0
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Abstract


In this paper, the sol - gel and impregnation - TiO2 Films Prepared by pulling , as an aqueous solution of methylene blue photocatalytic degradation catalysts investigated a variety of preparation conditions on the properties of TiO2 films by scanning electron microscopy (SEM) and X - ray diffraction (XRD) and other analytical testing methods, the surface of TiO2 thin films were characterized by morphology and crystal , and with methylene blue photocatalytic oxidation degradation rate associated with it. Study a variety of materials ratio and pH on the impact of TiO2 sol , the experimental results show that the volume ratio of the following materials prepared by sol : tetrabutyltitanate : ethanol : acetic acid : water = 9:36 : 2:1 , and then dip - dip into the legal system TiO2 films calcined at 450 ℃ for 1h, after UV irradiation 180min, methylene blue aqueous photocatalytic oxidation degradation rate reached 40%. 8 times continuously , the degradation rate remained constant , showing the TiO2 film catalyst has good stability. If the film for 3-4 times , under the same reaction conditions photocatalytic degradation rate can be increased to 46%. Based on this study were prepared doped Mo-TiO2 composite film was found Mo content of 0.6 %, the highest photocatalytic activity , corresponding to the catalytic oxidation of methylene blue degradation rate is 1.7 times the TiO2 film . This test also analyzed water contact angle on the TiO2 film , the thermal conductivity of the hydrophilic and the light guide hydrophilicity. The experimental results show that with the increase of calcination temperature , or under UV irradiation , TiO2 film surface hydrophilicity . Mo-TiO2 composite film hydrophilicity and thermal conductivity of the photoconductive hydrophilic with Mo content is increased with the increase . 0.6wt% of Mo-TiO2 composite film, the temperature of calcination at 450 ℃ , 60min after the UV irradiation , the contact angle of water droplets 0 °, the performance of a super hydrophilic properties .

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