title: Graphene oxide supported Au-Ag alloy nanoparticles with different shapes and their high catalytic activities.
abstract: 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.
authors: School of Science, Tianjin University, Tianjin, 300072, People's Republic of China.
authors: Tao
authors: T
authors: Wu
authors: Junkui
authors: J
authors: Ma
authors: Xingrui
authors: X
authors: Wang
authors: Yue
authors: Y
authors: Liu
authors: Han
authors: H
authors: Xu
authors: Jianping
authors: J
authors: Gao
authors: Wei
authors: W
authors: Wang
authors: Yu
authors: Y
authors: Liu
authors: Jing
authors: J
authors: Yan
mesh_terms: D001897:Boronic Acids; D006046:Gold / Q000737:chemistry*; D006047:Gold Alloys / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry; D036103:Nanotechnology; D010087:Oxides / Q000737:chemistry; D056951:Photoelectron Spectroscopy; D012834:Silver / Q000737:chemistry*
chemical_list: D001897:Boronic Acids; D006047:Gold Alloys; D010087:Oxides; D012834:Silver; D006046:Gold; D006108:Graphite; C010686:benzeneboronic acid