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A study on the preparation and application of Ag/TiO2 complex sol-part 1: Preparation and properties of Ag/TiO2 complex sol

Kuo-Shien Huang, Sheng-Haur Yu, Shyue-Pyng Wang

The primary aimof this study is to explore the property ofAg/TiO2complex sol. Ag/TiO2 complex sols are prepared at different pH values. The results show that the reaction ofAg and Ti(OH)4 is not suitable for the generation of Ti-O-Ag under alkaline conditions. Dried complex sols formed under acid conditions have a smaller particle size, whereas dried gels formed under alkaline conditions present a laminated structure.With increasing concentration ofAgNO3, specific surface area and pore volume of the dried gel are larger, but the orifices become smaller. In the case of excessAgNO3, for example 4-10 dried gel, there is a reverse effect on particle size.