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Plasmon Resonance Enhanced Photocatalysis Under Visible Light with Au/Cu–TiO2 Nanoparticles: Removal Cr (VI) from Water as a Case of Study

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Gold modified copper doped titania (Au/Cu:TiO2) nanoparticles were synthesized by a modified sol gel method and characterized using XRD, optical and TEM based techniques. The as-prepared material contained anatase phase particles with quasi-spherical morphology, showing enhanced absorption in the visible region and low photoluminescence emission intensity. Photocatalytic reduction of Cr (VI) in aqueous suspension with the Au/Cu:TiO2 catalyst under 532 nm laser radiation and a visible broad band lamp source yielded 96% and 45% removal, respectively, without any additives. The enhanced photocatalytic activity can be attributed to the improved plasmonic effect due to gold modification and the expanded visible absorption due to copper doping. Moreover a comparative study of the material properties and catalytic activity of TiO2, Cu–TiO2 and Au/Cu–TiO2 was carried out.
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Keywords: AU/CU–TIO2 NANOCOMPOSITE; HETEROGENEOUS CATALYSIS; PLASMONIC METALS; VISIBLE LIGHT ACTIVE CATALYST; WASTE WATER TREATMENT USING SOLAR RADIATIONS

Document Type: Research Article

Publication date: December 1, 2013

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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