Sonolytic Design of Graphene-Au Nanocomposites. Simultaneous and Sequential Reduction of Graphene Oxide and Au(III)

被引:187
作者
Vinodgopal, K. [1 ]
Neppolian, B. [2 ]
Lightcap, Ian V. [3 ]
Grieser, Franz [2 ]
Ashokkumar, Muthupandian [2 ]
Kamat, Prashant V. [3 ]
机构
[1] Indiana Univ NW, Dept Chem, Gary, IN 46408 USA
[2] Univ Melbourne, Sch Chem, Parkville, Vic 3052, Australia
[3] Univ Notre Dame, Dept Chem & Biochem, Radiat Lab, Notre Dame, IN 46556 USA
来源
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2010年 / 1卷 / 13期
基金
澳大利亚研究理事会;
关键词
BIMETALLIC NANOPARTICLES; AQUEOUS-SOLUTIONS; SONOCHEMICAL PREPARATION; ANCHORING SEMICONDUCTOR; METAL NANOPARTICLES; ATOM REACTIONS; FILMS; GOLD/PALLADIUM; TEMPERATURES; FABRICATION;
D O I
10.1021/jz1006093
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
High-frequency ultrasound at 211 kHz is effective in developing graphene-based nanoarchitectures. Both simultaneous and sequential reduction steps have been employed to reduce the graphene oxide (GO) and a gold precursor, HAuCl4. Characterization of the composites by transmission electron microscopy following the reduction process revealed well-dispersed Au nanoparticles on the reduced GO (RGO) sheets that are no more than a few layers thick (1-4 layers). The Raman spectra of the RGO Au composites showed a distinct surface enhancement of the graphene Raman bands upon increasing the surface coverage of gold nanoparticles. The merits of sonolytic reduction in developing graphene-based composites are discussed.
引用
收藏
页码:1987 / 1993
页数:7
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