Ion-Exchange Synthesis and Enhanced Visible-Light Photoactivity of Graphene/Hexagonal CuS/Ag2S Nanocomposites

Graphene loaded hexagonal CuS/Ag2S nanoplates have been successfully synthesized. Scanning electron microscopy and transmission electron microscopy observations show that hexagonal CuS/Ag2S nanoplates are tightly anchored onto graphene. The experimental results show that these nanocomposites have a highly visible-light photocatalytic performance. The high visible photocatalytic activities can be attributed to direct photoinduced interfacial charge transfer in the hexagonal CuS/Ag2S nanoplates and the further electrons transfer from CuS/Ag2S to graphene.