材料科学
还原剂
X射线光电子能谱
石墨烯
纳米颗粒
氧化物
催化作用
合金
透射电子显微镜
化学工程
纳米复合材料
氧化还原
纳米技术
复合材料
冶金
有机化学
化学
工程类
作者
Tao Wu,Junkui Ma,Xingrui Wang,Yue Liu,Xu Han,Jianping Gao,Wei Wang,Yu Liu,Jing Yan
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2013-03-04
卷期号:24 (12): 125301-125301
被引量:44
标识
DOI:10.1088/0957-4484/24/12/125301
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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