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Boron-doped nitrogen-deficient carbon nitride-based Z-scheme heterostructures for photocatalytic overall water splitting

Author

Listed:
  • Daming Zhao

    (Xi’an Jiaotong University)

  • Yiqing Wang

    (Xi’an Jiaotong University)

  • Chung-Li Dong

    (Tamkang University)

  • Yu-Cheng Huang

    (Tamkang University
    National Chiao Tung University)

  • Jie Chen

    (Xi’an Jiaotong University)

  • Fei Xue

    (Xi’an Jiaotong University)

  • Shaohua Shen

    (Xi’an Jiaotong University)

  • Liejin Guo

    (Xi’an Jiaotong University)

Abstract

Photocatalytic overall water splitting can be achieved using Z-scheme systems that mimic natural photosynthesis by combining dissimilar semiconductors in series. However, coupling well-suited H2- and O2-evolving components remains challenging. Here, we fabricate a Z-scheme system for photocatalytic overall water splitting based on boron-doped, nitrogen-deficient carbon nitride two-dimensional (2D) nanosheets. We prepare ultrathin carbon nitride nanosheets with varying levels of boron dopants and nitrogen defects, which leads to nanosheets that can act as either H2- or O2-evolving photocatalysts. Using an electrostatic self-assembly strategy, the nanosheets are coupled to obtain a 2D/2D polymeric heterostructure. Owing to their ultrathin nanostructures, strong interfacial interaction and staggered band alignment, a Z-scheme route for efficient charge-carrier separation and transfer is realized. The obtained heterostructure achieves stoichiometric H2 and O2 evolution in the presence of Pt and Co(OH)2 co-catalysts, and the solar-to-hydrogen efficiency reaches 1.16% under one-sun illumination.

Suggested Citation

  • Daming Zhao & Yiqing Wang & Chung-Li Dong & Yu-Cheng Huang & Jie Chen & Fei Xue & Shaohua Shen & Liejin Guo, 2021. "Boron-doped nitrogen-deficient carbon nitride-based Z-scheme heterostructures for photocatalytic overall water splitting," Nature Energy, Nature, vol. 6(4), pages 388-397, April.
    • Handle: RePEc:nat:natene:v:6:y:2021:i:4:d:10.1038_s41560-021-00795-9
    DOI: 10.1038/s41560-021-00795-9
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    Cited by:

    1. Jinshui Cheng & Linxiao Wu & Jingshan Luo, 2023. "Improving the photovoltage of Cu2O photocathodes with dual buffer layers," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. Lu, Buchu & Yan, Xiangyu & Liu, Qibin, 2023. "Enhanced solar hydrogen generation with the direct coupling of photo and thermal energy – An experimental and mechanism study," Applied Energy, Elsevier, vol. 331(C).
    3. Li, Yangyang & Zhang, Tao & Deng, Xintao & Liu, Biao & Ma, Jugang & Yang, Fuyuan & Ouyang, Minggao, 2022. "Active pressure and flow rate control of alkaline water electrolyzer based on wind power prediction and 100% energy utilization in off-grid wind-hydrogen coupling system," Applied Energy, Elsevier, vol. 328(C).
    4. Lu, Buchu & Jiao, Fan & Chen, Chen & Yan, Xiangyu & Liu, Qibin, 2023. "Temperature-entropy and energy utilization diagrams for energy, exergy, and energy level analysis in solar water splitting reactions," Energy, Elsevier, vol. 284(C).
    5. Nihat Ege Sahin & W. J. Pech-Rodríguez & P. C. Meléndez-González & Juan Lopez Hernández & E. Rocha-Rangel, 2023. "Water Splitting as an Alternative for Electrochemical Hydrogen and Oxygen Generation: Current Status, Trends, and Challenges," Energies, MDPI, vol. 16(13), pages 1-25, June.

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