Abstract
Natural flake graphite was used as raw materials to prepare graphite oxide and further treated with ultrasonic oscillation to get graphene oxide. Graphene–CdS composites were prepared by one step hydrothermal synthesis, using cadmium acetate as Cd precursors, sulfourea as S precursors and graphene oxide as support. Graphene–CdS composites were characterized by X-ray diffraction and scanning electron microscopy for the structure and morphology of the composites, and further investigated by transient photocurrent response and cyclic voltammetry. Improved photoelectric characteristics can be obtained over graphene–CdS composites than that of pure CdS nanoparticles due to electron capture and transfer ability of graphene resulting in a more efficient separation of the photoexcited charge carriers from graphene–CdS composites.
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