CdS/石墨烯复合材料的制备及其可见光催化分解水产氢性能

doi:10.3866/PKU.WHXB20110904

Abstract

Abstract: CdS/graphene composite photocatalysts were prepared by photocatalytically reducing graphene oxide with CdS nanoparticles in an aqueous ethanol solution. The structure and photoelectrical properties of the resulted materials were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and transient photocurrent measurements. The photocatalytic activities of the CdS/graphene composites for hydrogen evolution were evaluated under visible light irradiation (λ≥420 nm). The results show that the graphene oxide can be efficiently reduced by the photogenerated electrons of CdS and thus CdS/graphene composite is formed and it shows strong interactions between CdS and graphene. Compared with CdS, the enhanced photocurrent generation and photocatalytic activity toward hydrogen evolution for the CdS/ graphene composite photocatalysts could be attributed to the ability of graphene to capture and transport electrons, and to promote charge separation.

Key words: CdS, Graphene, Photoelectrical property, Hydrogen generation, Visible light

MIN Shi-Xiong, Lü Gong-Xuan. Preparation of CdS/Graphene Composites and Photocatalytic Hydrogen Generation from Water under Visible Light Irradiation[J].Acta Phys. -Chim. Sin., 2011, 27(09): 2178-2184.

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Preparation of CdS/Graphene Composites and Photocatalytic Hydrogen Generation from Water under Visible Light Irradiation

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