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Enhanced Solar-Radiation Induced Photocatalytic Activity of Surface-Modified Nanocrystalline Anatase-Titania

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Sol-gel derived pure nanocrystalline (~20–30 nm) anatase-titania has been surface-modified by depositing silver(I) oxide and silver (predominantly the former) via UV-reduction process. The pure and surface-modified nanocrystalline anatase-titania have been characterized using different analytical techniques for determining the average nanocrystallite size, phase-contents, surface-chemistry, as well as the absorption and photoluminescence characteristics. It is demonstrated that, the latter exhibits an enhanced solar-radiation induced photocatalytic activity as compared to that of the former as a result of the absorption in the visible-region and enhanced photo-induced e/h+ life-time, both caused by the surface-deposition of silver(I) oxide and silver.

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Authors thank the Department of Science and Technology (DST), India (Project # GAP 205139), and the Council of Scientific and Industrial Research (CSIR), India (Network Project # NWP0010 and Task Force Project # CMM0019) for funding the ceramic, nanotechnology, and photocatalysis research at NIIST-CSIR. Authors also thank Mr. P. Mukundan (NIIST-CSIR, India), and Mr. Narendra (Icon Analytical, India) for conducting the DR and TEM analyses.

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Correspondence to S. Shukla.

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Priya, R., Baiju, K.V., Shukla, S. et al. Enhanced Solar-Radiation Induced Photocatalytic Activity of Surface-Modified Nanocrystalline Anatase-Titania. Catal Lett 128, 137–143 (2009).

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