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.

引用

页数：10

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