▎ 摘　　要

In this study, one- and two-dimensional (1D and 2D) Au nanostructure/reduced graphene oxide (rGO) composites are simultaneously prepared via a redox-active ionic liquid (RAIL)I water (W) interfacial method without the use of a capping agent. The RAIL (ferrocenylmethyl)dodecyldimethylammonium tetrakis-[3,5-bis(trifluoromethyl)phenyl]borate ([FcMDDA(+)] [TFPB-]) plays the dual role of a hydrophobic liquid supporting the interfacial system as well as a reducing agent for the metal precursor and graphene oxide (GO). The RAILIW interfacial system provides two kinds of composites in the growth regions with no interference between them, namely, Au nanofiber/rGO composites at the RAILIW interface and Au nanosheet/rGO composites in the bulk of W, which can be easily separated after synthesis. The spontaneous formation mechanism of the two Au-rGO composites has been discussed in detail. Thus, an efficient strategy to prepare 1D and 2D Au-rGO composites simultaneously is developed by employing an interfacial system, which provides a new direction in the synthesis of metal-GO composites.