▎ 摘　　要

Graphene-ZnIn2S4 nanocomposite spheres were prepared via a facile photocatalytic reduction method. The samples were characterized by XRD, SEM, TEM, FT-IR, XPS and DRS. The results showed that the graphene oxide was reduced to graphene and ZnIn2S4 nanospheres were loaded on the surface of graphene sheets through a photocatalytic reduction process. The experimental results for photocatalytic hydrogen evolution of the samples indicated that the amount of evoluted H-2 under simulated sunlight irradiation using Graphene-ZnIn2S4 nanocomposite spheres was 1540.8 mu mol, 9.8 times of the pure ZnIn2S4 nanospheres, under optimal technological condition with the graphene content of 2.0wt% for 24 h. The enhanced performance can be attributed to the graphene which effectively promoted the transfer of photogenerated electrons. Furthermore, a detailed photocatalytic hydrogen evolution mechanism of Graphene-ZnIn2S4 nanocomposite spheres was investigated.