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

被引：17
|
作者：
Gondal, M. A. [1 ,2 ]
Dastageer, M. A. [1 ,2 ]
Rashid, S. G. [1 ,2 ]
Zubair, S. M. [3 ]
Ali, M. A. [4 ]
Anjum, D. H. [5 ]
Lienhard, J. H. [6 ]
McKinley, G. H. [6 ]
Varanasi, K. [6 ]
机构：
[1] King Fand Univ Petr & Minerals, Dept Phys, Laser Res Grp, Dhahran 31261, Saudi Arabia
[2] King Fand Univ Petr & Minerals, Ctr Excellence Nanotechnol CENT, Dhahran 31261, Saudi Arabia
[3] King Fand Univ Petr & Minerals, Dept Mech Engn, Dhahran 31261, Saudi Arabia
[4] King Fand Univ Petr & Minerals, Ctr Ctr Refining & Petrochem, Res Inst, Dhahran 31261, Saudi Arabia
[5] KAUST, Nanofabricat Imaging & Characterizat Core Lab, Thuwal 235996900, Saudi Arabia
[6] MIT, Dept Mech Engn, Cambridge, MA 02139 USA
来源：
SCIENCE OF ADVANCED MATERIALS | 2013年 / 5卷 / 12期
关键词：
Au/Cu-TiO2; Nanocomposite; Heterogeneous Catalysis; Plasmonic Metals; Visible Light Active Catalyst; Waste Water Treatment Using Solar Radiations; GOLD NANOPARTICLES; TIO2; REDUCTION; CR(VI); TITANIA; UV; PHOTOOXIDATION; PHOTOREDUCTION; SEMICONDUCTOR; ABSORPTION;
D O I：
10.1166/sam.2013.1669
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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.
引用
收藏
页码：2007 / 2014
页数：8
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