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TiO2/graphene composite from thermal reaction of graphene oxide and its photocatalytic activity in visible light

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Abstract

In this study, the P25 TiO2 nanoparticles and graphene sheets (GSs) composite were prepared from a facile thermal reaction of graphene oxide. Its microstructures and photocatalytic properties were characterized and measured using X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), Brunauer–Emmett–Teller (BET) specific area analysis, X-ray photoelectron spectroscopy (XPS), FT-IR spectra, and ultraviolet–visible (UV–vis) diffuse reflectance spectroscopy. Compared with pure P25 nanoparticles, the results reveal that (1) there is a red shift about 20 nm in the absorption edge of the P25/graphene composite; (2) the photocurrent of the composite is about 15 times higher than that of pure P25; (3) the visible light photocatalytic activity of the composite is enhanced greatly on decomposition of methylene blue (MB). The photocatalytic mechanism of the P25/graphene composite is also discussed.

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Acknowledgement

This study was supported by the National Basic Research Program of China (973 Program) (No. 2009CB939704 and 2009CB939705).

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Authors and Affiliations

  1. School of Physics and Technology and Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan, 430072, People’s Republic of China

    Yupeng Zhang & Chunxu Pan

  2. Center for Electron Microscopy, Wuhan University, Wuhan, 430072, People’s Republic of China

    Chunxu Pan

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  1. Yupeng Zhang
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  2. Chunxu Pan
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Correspondence to Chunxu Pan.

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Zhang, Y., Pan, C. TiO2/graphene composite from thermal reaction of graphene oxide and its photocatalytic activity in visible light. J Mater Sci 46, 2622–2626 (2011). https://doi.org/10.1007/s10853-010-5116-x

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  • DOI: https://doi.org/10.1007/s10853-010-5116-x

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