▎ 摘　　要

Sulfur-graphene (SG) composites were prepared by one-pot, one step method at room temperature, without addition of any reducing agent, only using Na2S center dot 9H(2)O,Na2SO3 and graphene oxide aqueous suspension as precursors. Transmission electron microscopy images show a thin layer of cloud-like sulfur as well as a few small sulfur particles (<0.3 mu m) were attached firmly on the surface of graphene. The photoluminescence spectroscopy implies the presence of electron transfer between sulfur and graphene. The electron transfer at the sulfur/graphene interface will greatly retard the recombination of photoinduced charge carriers and prolong electron lifetime, which contribute to the enhancement of photocatalytic performance. As a result, the SG composites exhibit high photocatalytic activity toward methylene blue degradation under both UV and visible light, probably due to the intimate contact between sulfur and graphene, the efficient charge transport of graphene sheets and hence reduced recombination rate of excited carriers, and great adsorptivity of dyes. (C) 2014 Elsevier B.V. All rights reserved.