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    Unique g-C3N4/PDI-g-C3N4 homojunction with synergistic piezo-photocatalytic effect for aquatic contaminant control and H2O2 generation under visible light

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    Type
    Article
    Authors
    Tang, Rongdi
    Gong, Daoxin
    Zhou, Yaoyu
    Deng, Yaocheng
    Feng, Chengyang
    Xiong, Sheng
    Huang, Ying
    Peng, Guanwei
    Li, Ling
    Zhou, Zhanpeng
    KAUST Department
    KAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955–6900, Saudi Arabia
    Date
    2021-11-15
    Online Publication Date
    2021-11-15
    Print Publication Date
    2022-04
    Embargo End Date
    2023-11-24
    Submitted Date
    2021-08-31
    Permanent link to this record
    http://hdl.handle.net/10754/673834
    
    Metadata
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    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.
    Citation
    Tang, 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
    Sponsors
    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).
    Publisher
    Elsevier BV
    Journal
    Applied Catalysis B: Environmental
    DOI
    10.1016/j.apcatb.2021.120929
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0926337321010547
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.apcatb.2021.120929
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