▎ 摘　　要

Copper-silver or copper-gold galvanic displacement could induce the reduction of graphene oxide, resulting in a fast and effective removal of the oxygen-containing groups in graphene oxide and formation of silver or gold nanoparticles on graphene sheets. A graphene oxide mediated long-range electron transfer process between copper and silver or chloroauric ions is proposed for the occurrence of the reactions. (C) 2013 Elsevier Ltd. All rights reserved.