Defect-rich selenium doped graphitic carbon nitride for high-efficiency hydrogen evolution photocatalysis

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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  • Qichao Zhang
  • Yajie Sun
  • Jiguang Deng
  • Yuxi Liu
  • Lin Jing
  • Hongxing Dai


Original languageEnglish
Journal / PublicationInternational Journal of Hydrogen Energy
Online published13 May 2023
Publication statusOnline published - 13 May 2023


Graphitic carbon nitride (g-C3N4) has been demonstrated as a promising non-metal material for photocatalytic hydrogen evolution (PHE), while its photocatalytic activity is greatly limited due to the narrow visible light response-ability and the intrinsic severe charge deep trapping and recombination effects. Herein, a co-functionalized g-C3N4 system by Se doping and nitrogen vacancies modification is developed through a Se vapor-assisted-chemical vapor deposition synthetic strategy. Advanced characterization results revealed that Se dopants promote the visible-light absorption ability of g-C3N4, while nitrogen defects-induced shallow trap states are constructive to improving charge separation/transportation efficiency by effectively retarding the detrimental charge deep trapping and recombination. As a result, the synergistic effect of the Se dopants and nitrogen defects leads to a highly efficient PHE performance of g-C3N4. The integrated engineering strategy and mechanism understanding provided in this work may offer new insights into developing other novel photocatalysts for various applications. © 2023 Hydrogen Energy Publications LLC.

Research Area(s)

  • Graphitic carbon nitride, Nitrogen vacancies, Photocatalytic hydrogen evolution, Selenium doping