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TiO2/g-C3N4 nanosheets hybrid photocatalyst with enhanced photocatalytic activity under visible light irradiation

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Abstract

The nanosheets TiO2/g-C3N4 hybrid material with efficient visible-light photocatalytic activity was prepared by a facile solvothermal method. The as-prepared TiO2/g-C3N4 nanosheets composite was thoroughly characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, N2 adsorption–desorption analysis, UV–Vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. As evaluated by the degradation of methylene blue under visible light irradiation, TiO2/g-C3N4 hybrid composites exhibit much higher photocatalytic activity than pristine g-C3N4 and TiO2, respectively. The significant enhancement in photodegradation activity over the TiO2/g-C3N4 photocatalyst can be ascribed to the combined effects of the nanosheet structure and subsequent efficient separation of photogenerated charge carriers. A tentative mechanism for the photodegradation process was proposed.

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Acknowledgments

This work has been supported by China Postdoctoral Science Foundation (2013M542415); National Nature Science Foundation of China (41305112); Youth Foundation of Xinjiang Uygur Autonomous Region (2013211B37); the “Cross-Cooperation Program for Creative Research Teams” of Chinese Academy of Sciences, and “Western Light” Program of Chinese Academy of Sciences (XBBS201126); Research projects of Education Department in Xinjiang Uygur Autonomous Region (XJEDU2011I56).

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Authors and Affiliations

  1. Laboratory of Environmental Sciences and Technology, Xinjiang Technical Institute of Physics & Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Science, 40-1 South Beijing Road, Ürümqi, 830011, Xinjiang, People’s Republic of China

    Yongmei Wu, Jie Zhao, Xiu Yue, Wenye Deng, Yingxuan Li & Chuanyi Wang

  2. Department of Chemical and Environmental Engineering, Xingjiang Institute of Engineering, Ürümqi, 830091, People’s Republic of China

    Yongmei Wu & Li Tao

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  1. Yongmei Wu
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  2. Li Tao
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  3. Jie Zhao
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  5. Wenye Deng
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  6. Yingxuan Li
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Correspondence to Yongmei Wu or Chuanyi Wang.

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Wu, Y., Tao, L., Zhao, J. et al. TiO2/g-C3N4 nanosheets hybrid photocatalyst with enhanced photocatalytic activity under visible light irradiation. Res Chem Intermed 42, 3609–3624 (2016). https://doi.org/10.1007/s11164-015-2234-8

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