Abstract
Zinc sulfide/Reduced graphene oxide (ZnS/RGO) nanocomposites were synthesized via one-step solvothermal method with commercial graphene oxide (GO) aqueous solution as precursor. The crystal structure and morphology of the ZnS/RGO nanocomposites were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM), respectively. During the process GO was reduced into RGO and ZnS nanoparticles with a diameter of about 5 nm were uniformly loaded on the surface of graphene sheets. The smaller size and uniform distribution of ZnS nanoparticles benefited from the higher purity and smaller size of GO in aqueous solution. The photocatalytic activity of the nanocomposites was investigated through the photocatalytic degradation of methyl orange in aqueous solution. The ZnS/RGO nanocomposites exhibited higher photocatalytic activity compared to pure ZnS; furthermore, the surface reaction rate constant of the nanocomposites was six times higher than that of the pure ZnS.
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