Synthesis and catalytic performance of graphene oxide-Au nanorings composites

A simple and facile method is described for the in situ synthesis of graphene oxide-Ag nanoplates (GO-AgNPs) hybrid structure and then served as sacrificial templates for producing graphene oxide-Au nanorings (GO-AuNRs) by galvanic replacement taken place on the GO surface. The catalytic activity of the resulting hybrid nanomaterial has been investigated for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with sodium borohydride (NaBH 4 ). The results showed that the rate constant of GO-AuNRs nanomaterials was 0.205 min − 1 and the samples showed significant enhancement in catalytic activity.