TY - JOUR
T1 - Unique g-C3N4/PDI-g-C3N4 homojunction with synergistic piezo-photocatalytic effect for aquatic contaminant control and H2O2 generation under visible light
AU - Tang, Rongdi
AU - Gong, Daoxin
AU - Zhou, Yaoyu
AU - Deng, Yaocheng
AU - Feng, Chengyang
AU - Xiong, Sheng
AU - Huang, Ying
AU - Peng, Guanwei
AU - Li, Ling
AU - Zhou, Zhanpeng
N1 - KAUST Repository Item: Exported on 2022-01-27
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; 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).
PY - 2021/11/15
Y1 - 2021/11/15
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/673834
UR - https://linkinghub.elsevier.com/retrieve/pii/S0926337321010547
UR - http://www.scopus.com/inward/record.url?scp=85119685196&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2021.120929
DO - 10.1016/j.apcatb.2021.120929
M3 - Article
SN - 0926-3373
VL - 303
SP - 120929
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -