Thin-walled vesicular Triazole-CN-PDI with electronic n→π* excitation and directional movement for enhanced atrazine photodegradation

Rongdi Tang, Hao Zeng, Daoxin Gong, Yaocheng Deng, Sheng Xiong, Ling Li, Zhanpeng Zhou, Jiajia Wang, Chengyang Feng, Lin Tang

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Polymeric carbon nitride (PCN) as a competitive non-metal photocatalyst, has been widely applied in water treatment. However, the limited visible-light utilization and high photocarrier recombination rate restrict its photocatalytic efficiency. Herein, triazole and pyromellitic diimide were applied for the bimolecular decoration of polymeric carbon nitride (PCN) to fabricate TA-CN-PDI for the photodegradation of atrazine. The thin-walled vesicular morphology in TA-CN-PDI can enhance the n→π* electron excitation, and the donor-π-acceptor electronic structure can promote the directional movement of photogenerated electrons and holes. The theoretical and experimental results suggested that the vesicular structure and the donor-π-acceptor electronic structure synergistically promoted the photoactivity of the catalyst. Compared to the pristine PCN, the reaction rate constants of atrazine by TA-CN-PDI increased to 6.64-fold, achieving a 95 % removal rate. It was found that1O2, OH, h+, ·O2- were contributed to the ATZ degradation. In addition, mainly 14 intermediates and two pathways were proposed according to the LC-MS analysis. Hopefully, this modification strategy of PCN and its application in ATZ degradation can pave a way for subsequent research on the modification of photocatalysts.
Original languageEnglish (US)
Pages (from-to)138445
JournalChemical Engineering Journal
Volume451
DOIs
StatePublished - Aug 13 2022

Bibliographical note

KAUST Repository Item: Exported on 2022-09-14
Acknowledgements: The study was financially supported by the National Natural Science Foundation of China (Grant No.51909089), Natural Science Foundation of Hunan Province, China (Grant No. 2020JJ5252, 2021JJ40091), China Postdoctoral Science Foundation (Grant No. 2019 M662781), Science Foundation for Young Scholars of Hunan Agricultural University (19QN35), and Hunan Provincial Innovation Foundation for Postgraduate (CX20200663).

ASJC Scopus subject areas

  • Environmental Chemistry
  • General Chemical Engineering
  • General Chemistry
  • Industrial and Manufacturing Engineering

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