Plasmon resonance enhanced photocatalysis under visible light with Au/Cu-TiO2 nanoparticles: Removal Cr (VI) from water as a case of study
AuthorsGondal, M. A.
Dastageer, Mohamed Abdulkader
Rashid, Shama G.
Zubair, Syed M.
Ali, Mohammada A.
Anjum, Dalaver H.
Lienhard V, John H.
McKinley, Gareth H.
Varanasi, Kripa K.
KAUST DepartmentImaging and Characterization Core Lab
Advanced Nanofabrication, Imaging and Characterization Core Lab
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AbstractGold 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:TiO2catalyst 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-TiO2and Au/Cu-TiO2 was carried out. © 2013 by American Scientific Publishers.
SponsorsThe support by KFUPM and MIT through project # MIT11109 and MIT11110 is gratefully acknowledged.
PublisherAmerican Scientific Publishers
JournalScience of Advanced Materials