Unique g-C3N4/PDI-g-C3N4 homojunction with synergistic piezo-photocatalytic effect for aquatic contaminant control and H2O2 generation under visible light
KAUST DepartmentKAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955–6900, Saudi Arabia
Online Publication Date2021-11-15
Print Publication Date2022-04
Embargo End Date2023-11-24
Permanent link to this recordhttp://hdl.handle.net/10754/673834
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AbstractHerein, 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.
CitationTang, R., Gong, D., Zhou, Y., Deng, Y., Feng, C., Xiong, S., … Zhou, Z. (2022). Unique g-C3N4/PDI-g-C3N4 homojunction with synergistic piezo-photocatalytic effect for aquatic contaminant control and H2O2 generation under visible light. Applied Catalysis B: Environmental, 303, 120929. doi:10.1016/j.apcatb.2021.120929
SponsorsThe 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).