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The Ag/TiO2 powders were similarly prepared using a modified
sol¨Cgel method as described in our previous work [15]. In a typical
synthesis, a 0.2 g solid AgNO3 was dissolved in 20 mL of ethanol,
followed by addition of mixture containing 8 mL of tetra-n-butyl
titanate, 80 mL of ethanol, 4 mL of ethyl acetoacetate. Then 1 mL
distilled water was added by dropwise to the above mixed solution in
the absence of light, the mixed solutionwas successively stirred for 4 h
until a clear and transparent sol was obtained. Subsequently, the sol
was dried at 353 K to get xerogel, which was grinded and calcined at
723 K for 2 h.
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