Preparation of nano-Ag/TiO2 thin-film

Steady TiO2 water-sol was prepared by peptization and the effects of pH value, temperature, concentration of colloid and peptizator on sol were investigated. Laser grain analyzer was used to verify nano-particles in the sol. The photocatalytic degradation ratio and antibacterial property of nano-Ag/...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2008-08, Vol.18 (4), p.986-994
Main Author: 彭兵 王佳 柴立元 毛爱丽 王云燕
Format: Article
Language:English
Subjects:
制备方法
水溶胶
热处理
纳米银/二氧化钛薄膜
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Summary:Steady TiO2 water-sol was prepared by peptization and the effects of pH value, temperature, concentration of colloid and peptizator on sol were investigated. Laser grain analyzer was used to verify nano-particles in the sol. The photocatalytic degradation ratio and antibacterial property of nano-Ag/TiO2 thin-film on ceramics were used as the main index in addition to XRD analysis. The effect of film layers, embedding Ag^＋, annealing temperature and time on the degradation ratio and antibacterial property was studied. The temperature 30-80 ℃, pH 1.2-2.0, concentrations of 0.05-0.3 mol/L sol and 5% HNO3 would be the optimal parameters for the TiO2 water-sol preparation. The nano-Ag/TiO2 film of three layers with 3% AgNO3 embedded and treated at 350℃ for 2 h exhibits good performance. The elementary research on the kinetics of degradation shows that the reactions are on the first order kinetics equation.
ISSN:1003-6326
DOI:10.1016/S1003-6326(08)60170-3