Abstract
Herein, a g-C3N4/PDI-g-C3N4 homojunction has been fabricated for piezo-photocatalytic atrazine removal and exhibited better performance than individual photocatalysis or piezocatalysis. The introduction of PDI induces the π-π interaction facilitating electrons migration, and twists the g-C3N4 plane into a more polar porous structure with enhanced piezoelectricity. The homojunction facilitates the photoelectron transfer at the g-C3N4/PDI-g-C3N4 interfaces. The photoelectricity and the piezoelectricity of g-C3N4/PDI-g-C3N4 were assessed. The finite element simulation showed that the porous structure of the g-C3N4/PDI-g-C3N4 is essential to the enhanced piezoelectricity. Astonishingly, the piezo-photocatalytic atrazine degradation rate under an optimized condition (pH=2.97) reached 94% within 60 min. Moreover, the g-C3N4/PDI-g-C3N4 homojunction produced 625.54 μM H2O2 during the one-hour piezo-photocatalysis. Given the quenching experiments, reactive species detection and the electronic band of g-C3N4/PDI-g-C3N4, the piezo-photocatalytic mechanism has been proposed. In addition, the degradation pathways and the reduced intermediates toxicity intermediates of atrazine have been investigated.
Original language | English (US) |
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Pages (from-to) | 120929 |
Journal | Applied Catalysis B: Environmental |
Volume | 303 |
DOIs | |
State | Published - Nov 15 2021 |
Bibliographical note
KAUST Repository Item: Exported on 2022-01-27Acknowledgements: 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; No. 2020JJ5224), China Postdoctoral Science Foundation (Grant No. 2019M662781), Science Foundation for Young Scholars of Hunan Agricultural University (19QN35), and Hunan Provincial Innovation Foundation for Postgraduate (CX20200663).
ASJC Scopus subject areas
- General Environmental Science
- Catalysis
- Process Chemistry and Technology