Title | Plasmon Resonance Enhanced Photocatalysis Under Visible Light with Au/Cu–TiO2 Nanoparticles: Removal of Cr (VI) from Water as a Case Study |
Publication Type | Journal Article |
Year of Publication | 2013 |
Authors | Gondal M.A, Dastageer M.A, Rashid S.G, Zubair S.M, Ali M.A, Anjum D.H, Lienhard J.H, McKinley G.H, Varanasi K.K |
Journal | Science of Advanced Materials |
Volume | 5 |
Issue | 12 |
Pagination | 1-8 |
Abstract | 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. |
DOI | 10.1166/sam.2013.1669 |