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“Carbon diffusion” engineered carbon nitride nanosheets for high-efficiency photocatalytic solar-to-fuels conversion

Author

Listed:
  • Chen, Ruijie
  • Zhang, Zhiqiang
  • Wu, Jun
  • Chen, Xueru
  • Wang, Lei
  • Yin, Haotian
  • Li, Hongping
  • Ding, Jing
  • Wan, Hui
  • Guan, Guofeng

Abstract

The fabrication of graphitic carbon nitride (g-C3N4) has received much attention for its superior photoelectronic properties, it remains a remarkable challenge with a feasible methodology. Herein, inspired by carburization, a novel method with carbon diffusion was proposed to prepare g-C3N4 nanosheets (CNNS). The carbon diffusion was caused by the gradient difference in carbon concentration between the gaseous environment and the C15 (mild steel with low carbon content) during thermal polymerization. Eventually, the CNNS with approximately 1.5 nm thickness was successfully fabricated and exhibited larger surface area (98.08 m2 g−1), which was 15.42 times higher than that of bulk g-C3N4 (BCN). In the evaluation of photocatalytic CO2 reduction activity, the CH3OH formation rate over CNNS (2.10 μmol g−1 h−1) was 3.28 times greater than BCN. Meanwhile, the designed CNNS exhibited dramatic improvement on H2 evolved rate (HER) of 2507.02 μmol g−1 h−1, which was 6.99 times higher than BCN. More importantly, the C15 possessed the advantage of 10 times recycled to use for the fabrication of CNNS accompanied by a moderate decrease of HER. Moreover, the density functional theory (DFT) calculations were carried out based on the results. This work highlights an ingenious tactic with carbon diffusion for preparing CNNS towards renewable solar energy conversion.

Suggested Citation

  • Chen, Ruijie & Zhang, Zhiqiang & Wu, Jun & Chen, Xueru & Wang, Lei & Yin, Haotian & Li, Hongping & Ding, Jing & Wan, Hui & Guan, Guofeng, 2022. "“Carbon diffusion” engineered carbon nitride nanosheets for high-efficiency photocatalytic solar-to-fuels conversion," Renewable Energy, Elsevier, vol. 197(C), pages 943-952.
  • Handle: RePEc:eee:renene:v:197:y:2022:i:c:p:943-952
    DOI: 10.1016/j.renene.2022.08.014
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    References listed on IDEAS

    as
    1. Jiang, Runren & Lu, Guanghua & Liu, Jianchao & Wu, Donghai & Yan, Zhenhua & Wang, Yonghua, 2021. "Incorporation of π-conjugated molecules as electron donors in g-C3N4 enhances photocatalytic H2-production," Renewable Energy, Elsevier, vol. 164(C), pages 531-540.
    2. Guo, Feng & Chen, Zhihao & Shi, Yuxing & Cao, Longwen & Cheng, Xiaofang & Shi, Weilong & Chen, Lizhuang & Lin, Xue, 2022. "A ragged porous hollow tubular carbon nitride towards boosting visible-light photocatalytic hydrogen production in water and seawater," Renewable Energy, Elsevier, vol. 188(C), pages 1-10.
    3. Liu, Enli & Lin, Xue & Hong, Yuanzhi & Yang, Lan & Luo, Bifu & Shi, Weilong & Shi, Junyou, 2021. "Rational copolymerization strategy engineered C self-doped g-C3N4 for efficient and robust solar photocatalytic H2 evolution," Renewable Energy, Elsevier, vol. 178(C), pages 757-765.
    4. Hao Bin Wu & Bao Yu Xia & Le Yu & Xin-Yao Yu & Xiong Wen (David) Lou, 2015. "Porous molybdenum carbide nano-octahedrons synthesized via confined carburization in metal-organic frameworks for efficient hydrogen production," Nature Communications, Nature, vol. 6(1), pages 1-8, May.
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    Cited by:

    1. Ding, Qun & Zou, Xuejun & Ke, Jun & Dong, Yuying & Cui, Yubo & Lu, Guang & Ma, Hongchao, 2023. "S-scheme 3D/2D NiCo2O4@g-C3N4 hybridized system for boosting hydrogen production from water splitting," Renewable Energy, Elsevier, vol. 203(C), pages 677-685.

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    More about this item

    Keywords

    g-C3N4 nanosheets; Carbon diffusion; Photocatalytic CO2 reduction; Photocatalytic H2 evolution;
    All these keywords.

    JEL classification:

    • H2 - Public Economics - - Taxation, Subsidies, and Revenue

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