▎ 摘　　要

Graphene oxide-supported uniform Ag@AgCl core-shell nanoparticle composites have been successfully prepared by a facile two-step synthetic process. First, graphene oxide sheets were used as carriers to anchor and disperse Ag nanoparticles on their surface. Then these fixed Ag nanoparticles on carbon sheets are utilized as precursors, around which AgCl nanocrystals form in situ using FeCl3 as oxidant, forming graphene oxide-supported Ag@AgCl core-shell nanoparticle composites. The composition of these attached Ag@AgCl core-shell nanoparticles can be easily controlled by adjusting the usage of FeCl3, resulting in the formation of controllable core-shell nanostructures. Furthermore, these as-prepared graphene oxide-Ag@AgCl nanoparticle composites display effective photodegradation of methylene orange dye under visible light irradiation, which indicates their potential applications in environmental areas.