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Synthesis, characterization and photocatalytic study of graphene oxide and cerium co-doped in TiO2

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Abstract

The nanocomposite of titanium dioxide (TiO2) combined with graphene oxide (GO) and cerium (Ce) was successfully synthesized via sol–gel method followed by calcining at 300 °C for 2 h. The composite was characterized by X-ray diffraction, ultraviolet–visible diffuse reflectance spectroscopy, scanning electron microscopy (SEM) and Brunauer–Emmett–Teller. The photocatalytic activity was evaluated by photodegradation of methylene blue (MB) under the irradiation of xenon lamp. This study demonstrated that GO and Ce co-doped in TiO2 could broaden absorption edge to the visible light and increase surface area of samples. SEM observation showed that addition of Ce could solve the problem of the agglomeration of GO under the same experimental conditions. Moreover, the MB photocatalytic degradation rate of the composite with GO doped for 0.2 % and Ce doped for 0.6 % (mass ratio) was up to 97.7 %, which was largely attributed to the synergistic effects in the GO, Ce and TiO2 system.

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Acknowledgments

The present study was supported by Hunan Provincial Natural Science Foundation of China (2015JJ6025) and International Cooperation Project (2015DFA61170).

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Authors and Affiliations

  1. College of Civil Engineering, Hunan University, No. 2 Lushan South Road, Yuelu District, Changsha, 410082, Hunan, China

    Jia Li & Quan Zhang

  2. Department of Architectural Engineering, Hunan Institute of Engineering, Xiangtan, 411104, Hunan, China

    Liping Zeng

  3. College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China

    Deliang He

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  1. Jia Li
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Correspondence to Quan Zhang.

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Li, J., Zhang, Q., Zeng, L. et al. Synthesis, characterization and photocatalytic study of graphene oxide and cerium co-doped in TiO2 . Appl. Phys. A 122, 51 (2016). https://doi.org/10.1007/s00339-015-9580-7

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