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Band Gap Engineering in NaBiO3·2H2O/NaBiO3·xH2O Heterostructures for High Photoelectronic Response

  • X. S. Liu
    X. S. Liu
    Henan Key Laboratory of Photovoltaic Materials and Laboratory of Low Dimensional Materials Science, Henan University, Kaifeng 475004, PR China
    More by X. S. Liu
  • Z. T. Shen
    Z. T. Shen
    Henan Key Laboratory of Photovoltaic Materials and Laboratory of Low Dimensional Materials Science, Henan University, Kaifeng 475004, PR China
    More by Z. T. Shen
  • F. J. Wang
    F. J. Wang
    Henan Key Laboratory of Photovoltaic Materials and Laboratory of Low Dimensional Materials Science, Henan University, Kaifeng 475004, PR China
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  • G. Q. Li
    G. Q. Li
    Henan Key Laboratory of Photovoltaic Materials and Laboratory of Low Dimensional Materials Science, Henan University, Kaifeng 475004, PR China
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  • M. Y. Wang
    M. Y. Wang
    Henan Key Laboratory of Photovoltaic Materials and Laboratory of Low Dimensional Materials Science, Henan University, Kaifeng 475004, PR China
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  • X. K. Hao
    X. K. Hao
    Henan Key Laboratory of Photovoltaic Materials and Laboratory of Low Dimensional Materials Science, Henan University, Kaifeng 475004, PR China
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  • , and 
  • W. F. Zhang*
    W. F. Zhang
    Henan Key Laboratory of Photovoltaic Materials and Laboratory of Low Dimensional Materials Science, Henan University, Kaifeng 475004, PR China
    *Email: [email protected]. Phone: +86 371 2388 0696. Fax: +86 371 2388 0659.
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Cite this: J. Phys. Chem. C 2020, 124, 30, 16271–16277
Publication Date (Web):July 8, 2020
https://doi.org/10.1021/acs.jpcc.0c03299
Copyright © 2020 American Chemical Society
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Abstract

High photoelectronic response with a broad spectral range in photoelectric materials is of great importance for photovoltaic and photocatalytic applications. However, the existing photoelectric materials, such as TiO2 and α-Fe2O3, exhibit only high photoelectronic response or only broad spectral response because of the wide band gap limitation of light absorbance or low photogenerated charge separation efficiency. Here, we report NaBiO3·2H2O annealed at a given temperature to form NaBiO3·2H2O/NaBiO3·xH2O heterostructures, which efficiently drives the photogenerated charge separation in a broad spectral range. The best performance of the wide photoelectronic response and high surface photovoltage was obtained in the sample annealed at 130 °C. The high surface photovoltage with a wide spectral range is attributed to the band gap engineering of NaBiO3·2H2O/NaBiO3·xH2O heterostructures for efficient photogenerated charge separation. These findings regarding the use of optimized NaBiO3·2H2O/NaBiO3·xH2O heterostructures suggest that fine-tuning the heterostructure of the photoelectric materials is an effective approach for improving the photoelectrical performance in optoelectronic applications.

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The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.jpcc.0c03299.

  • TG and DSC curves of NaBiO3 prepared at the temperatures of 30, 150, and 30–220 °C; projected density of states of Na, Bi, O, and H; projected density of states of Na, Bi, and O; and magnified images of the projected density of states (PDF)

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Cited By


This article is cited by 3 publications.

  1. Zicheng Zhai, Wenliang Wang, Kaixu Ren, Haifeng Shi. 2D/2D black-BiOCl/ Fe2O3 heterojunction photo-Fenton catalytic system for enhanced visible-light tetracycline degradation. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2021, 626 , 126953. https://doi.org/10.1016/j.colsurfa.2021.126953
  2. Mengyue Wang, Xiangkai Hao, Xiansheng Liu, Jianjun Tian, Chaoyang Kang, Weifeng Zhang. Fine structures of conduction and intermediate bands of NaBiO3•2H2O/NaBiO3•xH2O heterostructures investigated by surface photovoltage measurement with external bias. Surfaces and Interfaces 2021, 26 , 101374. https://doi.org/10.1016/j.surfin.2021.101374
  3. Heesoo Park, Syam Kumar R, Akinlolu Akande, Stefano Sanvito, Fedwa El-Mellouhi. The rise of Nb-, Ta-, and Bi-based oxides/chalcogenides for photocatalytic applications. International Journal of Hydrogen Energy 2021, 3 https://doi.org/10.1016/j.ijhydene.2021.05.145