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Remarkably enhanced photoinduced charge separation rate of Bi2WO6 by Cu2+ doping

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Abstract

In this paper, Cu2+ was successfully doped into Bi2WO6 to further promote the photocatalytic performance of Bi2WO6. The presence of Cu2+ in the lattice of Bi2WO6 can be confirmed by the results of X-ray diffraction (XRD), energy dispersive spectrometer (EDS), high-resolution transmission electron microscopy (HRTEM) and element mapping images. The results of surface photovoltage spectroscopy (SPS) show that doping Cu2+ into the lattice of Bi2WO6 can greatly boost the separation rate of photoinduced electron–hole pairs. The electron spin-resonance (ESR) and trapping investigation exhibit that ·O2− is the main active free radicals. The photocatalytic performance of Cu-doped Bi2WO6 photocatalysts toward decolorization of rhodamine B (RhB) was evaluated under simulated sunlight irradiation using a 500 W Xe lamp as light source. Cu-doped Bi2WO6 photocatalysts display remarkably enhanced photocatalytic performance than the bare Bi2WO6, and when the molar ratio of Cu/Bi is 0.6%, the photocatalyst prepared displays the best photocatalytic activity.

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Acknowledgements

This project was supported financially by the program of Science and Technology Department of Sichuan province (No. 2017096), Students Innovation Project of Sichuan Province (No. 201710622065) and the Project of Zigong city (No. 2016HG06).

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Authors and Affiliations

  1. Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong, 643000, People’s Republic of China

    Junbo Zhong, Jiufu Chen, Qi Yang, Chuan Hu & Jianzhang Li

  2. Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of China

    Ran Duan

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  1. Junbo Zhong
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  2. Jiufu Chen
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  3. Qi Yang
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  4. Chuan Hu
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  5. Jianzhang Li
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  6. Ran Duan
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Correspondence to Junbo Zhong or Jiufu Chen.

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Zhong, J., Chen, J., Yang, Q. et al. Remarkably enhanced photoinduced charge separation rate of Bi2WO6 by Cu2+ doping. Appl. Phys. A 124, 583 (2018). https://doi.org/10.1007/s00339-018-2008-4

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  • DOI: https://doi.org/10.1007/s00339-018-2008-4

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