A novel sulfur-assisted annealing method of g-C3N4 nanosheet compensates for the loss of light absorption with further promoted charge transfer for photocatalytic production of H2 and H2O2

Chengyang Feng, Lin Tang, Yaocheng Deng, Jiajia Wang, Yani Liu, Xilian Ouyang, Haoran Yang, Jiangfang Yu, Jingjing Wang

Research output: Contribution to journalArticlepeer-review

219 Scopus citations

Abstract

Exfoliating g-C3N4 into 2D nanosheet to minimize the stacking layer for the improvement of charge transfer and separation is considered to be the effective measure to enhance its photocatalytic performance. However, no matter what method is used, the exfoliated g-C3N4 nanosheet shows decreased optical absorption compared to the pristine bulk-like one. In this work, a simple one-step sulfur doping method is proposed on the basis of exfoliated g-C3N4 nanosheet, which can directly regulate the band structure of g-C3N4 and enhance its optical absorption ability. The proposed sulfur doping method redshift the light absorption edge of g-C3N4 nanosheet to the level of pristine bulk-like g-C3N4, and even induce the generation of a new n→π* absorption band. In addition, the introduced sulfur doping site can form a local electron accumulation point, so that to further improve the charge separation efficiency and surface charge transfer ability of g-C3N4 nanosheets.
Original languageEnglish (US)
JournalApplied Catalysis B: Environmental
Volume281
DOIs
StatePublished - Feb 1 2021
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-23

ASJC Scopus subject areas

  • General Environmental Science
  • Catalysis
  • Process Chemistry and Technology

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