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The photoreduction of Ag + ions at the surface of colloidal TiO 2 nanoparticles has been investigated. Irradiation of an aqueous solution containing TiO 2 and Ag + ions with near-UV light brings about the growth of a sharp absorption band of colloidal silver in absorption spectrum. The photoreduction of Ag + ions by TiO 2 is optically sensitized by a...
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