| In this paper I discussed the theory application and preparation of thetwo kinds of nanometer thin film, TiO2 and F-doped SnO2 nanometer thin film.And I concluded by a series of measuring methods that the TiO2 coating glasswe prepared in my lab has good property of self-cleaning; the SnO2:F lowemission coating glass has high top-quality energy saving character.We prepared TiO2 nanometer thin film by the method of Sol-Gel, and wedeposited it on a glass surface. We use the photo catalytic degradation ofmethyl orange solution spectrophotometric method to measure thedegradation rate of organic matter, and the degradation rate is 36.6%/h; aUV-Vis spectrophotometric scanning procedure to measure the transmittanceand it's visible transmissivity is more than 70% A hydrophility measuringmethod by using a contact angle meter measured the contact meter is about 5o,so it is hydrophility. Without the ultraviolet radiation, the contact angle willcome back to become bigger, and then we continued to use ultravioletradiation on it, it became hydrophility again. The above-mentioned methodshave been used in research works and production process of self-cleaningglass.Transparent low-resistance SnO2: F films, suitable as a low-emissivityand conducting coating, have been deposited on silica-coated soda lime glassby pyrosol. SnCl4 ?5H2O and NH4F (F/Sn=1:4) dissolved in50%C2H5OH/50%H2O solvent served as the starting solution. With theparameters such as substrate temperature of 450 , distance between nozzleand substrate of 60mm, carrier gas flow rate of 8L/MIN and deposition time of5 min, the optimized SnO2: F films having a sheet resistance of about 2 ?/ sqwith infrared reflection about 97.9%, were deposited repeatedly.
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