Graphene oxide supported Au-Ag alloy nanoparticles with different shapes and their high catalytic activities

被引：44
|
作者：
Wu, Tao [1 ]
Ma, Junkui [1 ]
Wang, Xingrui [1 ]
Liu, Yue [1 ]
Xu, Han [2 ]
Gao, Jianping [1 ]
Wang, Wei [2 ]
Liu, Yu [1 ]
Yan, Jing [1 ]
机构：
[1] Tianjin Univ, Sch Sci, Tianjin 300072, Peoples R China
[2] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
来源：
NANOTECHNOLOGY | 2013年 / 24卷 / 12期
基金：
美国国家科学基金会;
关键词：
GOLD NANOPARTICLES; BIMETALLIC NANOPARTICLES; SILVER NANOPARTICLES; REDUCTION; CHEMISTRY; PHASE; NANOCRYSTALS; BIOLOGY; SIZE; PD;
D O I：
10.1088/0957-4484/24/12/125301
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A simple method was developed to fabricate Au-Ag nanoparticle/graphene oxide nanocomposites (Au-Ag/GO) by using simultaneous redox reactions between AgNO3, HAuCl4 and GO. The Au-Ag/GO was characterized by x-ray photoelectron spectroscopy, transmission electron microscopy and energy dispersive x-ray spectroscopy. The GO nanosheets acted as the reducing agent and the support for the Au-Ag alloy nanoparticles. In addition, Au-Ag alloy nanoparticles with different shapes including core-shell-like, dendrimer-like and flower-like were obtained by simply modifying the concentration of the reactants and the reaction temperature. With no reducing or stabilizing agents added, the Au-Ag/GO nanocomposites show superior catalytic performance for the reduction of 4-nitrophenol and for the aerobic homocoupling of phenylboronic acid.
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页数：10
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