A novel Cr2O3/Cr-doped g-C3N4 photocatalyst with a narrowed band gap for efficient photodegradation of tetracycline

Sen Wang, Hong Chen*, Qing Lin, Qian Lu, Wei Lv, Can Wang, Linhao Yu, Yingying Li, Yongdan Li*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Two significant strategies for enhancing photocatalyst performance are heterojunction construction and band gap modulation, but up until now, these methods have typically been treated separately. This work examines a strategy combining the heterojunction with a mid-gap state to prepare a novel Cr2O3 modified Cr-doped g-C3N4 photocatalyst for antibiotics degradation. According to the characterization results, the integration of Cr 3d orbital energy level into the original band gap of g-C3N4 results in the formation of Cr-doped g-C3N4, leading to a reduction in the band gap from 2.80 eV to 2.36 eV. Besides, the constructed Z-type heterojunction enhances the separation of photoinduced carriers. The degradation experiments of tetracycline proved the significant enhancement in the photocatalytic performance of the prepared catalyst. In addition, the degradation effect of the prepared catalyst on tetracycline in micro-polluted lake water was also investigated, revealing the applicability of the catalyst in the purification of natural water environments.

Original languageEnglish
Article number114613
Number of pages11
JournalCatalysis Today
Volume431
Early online date29 Feb 2024
DOIs
Publication statusPublished - 1 Apr 2024
MoE publication typeA1 Journal article-refereed

Keywords

  • Environmental restoration
  • Photocatalysis
  • Tetracycline degradation
  • Visible light
  • Z-type heterojunction

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