▎ 摘　　要

In this paper, we described an effective method for the in situ synthesis of Au nanoparticles (Au NPs) on 8-hydroxyquinoline ligands-containing copolymer brushes modified graphene oxide (GO) nanosheets. The copolymer brushes of P(OEGMA-co-MQ) were grafted from the surface of GO by reversible addition-fragmentation chain transfer (RAFT) polymerization based on the monomers of oligo(ethylene glycol) monomethyl ether methacrylate (OEGMA) and 5-(2-methacryloyl-ethyloxymethyl)-8-quinolinol (MQ). Au NPs were generated via in situ reduction of Au3+ by an alkali and the 8-hydroxyquinoline units in the copolymer brushes were used as capping agents to stabilize Au NPs. The obtained Au NPs-GO hybrids exhibited a weak blue fluorescence emission at 475 nm and high catalytic activity in water for the reduction of 4-nitrophenol (4-NP).