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Doping effect of metalloid group in graphitic carbon nitride molecular structure for significantly improved photocatalytic hydrogen production and photoelectric performance

Author

Listed:
  • Wu, Jiacong
  • Li, Chunmei
  • Dong, Hongjun
  • Zhang, Haibo
  • Han, Juan
  • Wang, Lei
  • Yu, Siyu
  • Wang, Yun

Abstract

It is a considerable research focus to introduce a new conjugate structure into the graphitic carbon nitride (g-C3N4) molecule by polymerization to improve the photocatalytic and photoelectrochemical performance. Herein, the 1,4-cyclohexadiene (CHD) group-doped g-C3N4 (CHD-g-C3N4) nanosheet photocatalyst is prepared by a simple thermal polymerization, which dramatically improves the photocatalytic H2 production and photoelectrochemical performance. Surprisingly, the optimal H2 production rate and the photocurrent density of CHD-g-C3N4 reaches up to 522.0 μmol h−1 g−1 and 31.19 μA cm−2, which is 6.29 and 6.96 times higher than that of pure g-C3N4, respectively. The high-efficiency and stable photocatalytic H2 production and photoelectrochemical performance of CHD-g-C3N4 originate from the doping effect of conjugated groups in g-C3N4 molecule, which extends the π-conjugated system to accelerate electron mobility. This work indicates that the introduction of metalloid groups with conjugation effect is of great significance for improving photocatalytic and photoelectric performance, and provides a new idea for the non-metallic modification of g-C3N4 as a highly active catalyst.

Suggested Citation

  • Wu, Jiacong & Li, Chunmei & Dong, Hongjun & Zhang, Haibo & Han, Juan & Wang, Lei & Yu, Siyu & Wang, Yun, 2020. "Doping effect of metalloid group in graphitic carbon nitride molecular structure for significantly improved photocatalytic hydrogen production and photoelectric performance," Renewable Energy, Elsevier, vol. 157(C), pages 660-669.
    • Handle: RePEc:eee:renene:v:157:y:2020:i:c:p:660-669
    DOI: 10.1016/j.renene.2020.04.086
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    References listed on IDEAS

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    1. Jianhua Sun & Jinshui Zhang & Mingwen Zhang & Markus Antonietti & Xianzhi Fu & Xinchen Wang, 2012. "Bioinspired hollow semiconductor nanospheres as photosynthetic nanoparticles," Nature Communications, Nature, vol. 3(1), pages 1-7, January.
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