Citation: Futao Yi, Ying Liu, Yao Chen, Jiahao Zhu, Quanguo He, Chun Yang, Dongge Ma, Jun Liu. Dual S-Scheme g-C₃N₄/Ag₃PO₄/g-C₃N₅ photocatalysts for removal of tetracycline pollutants through enhanced molecular oxygen activation[J]. Chinese Chemical Letters, ;2025, 36(8): 110544. doi: 10.1016/j.cclet.2024.110544 shu

Dual S-Scheme g-C₃N₄/Ag₃PO₄/g-C₃N₅ photocatalysts for removal of tetracycline pollutants through enhanced molecular oxygen activation

Futao Yi ^{a, b, 1} ,
Ying Liu ^{a, 1} ,
Yao Chen ^a ,
Jiahao Zhu ^c ,
Quanguo He ^a ,
Chun Yang ^{a, *,} ,
Dongge Ma ^{d, *,} ,
Jun Liu ^{a, *,}

a.
College of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 412007, China
b.
College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
c.
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
d.
Department of Chemistry, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China

yangchunyc@hut.edu.cn

madongge@btbu.edu.cn

junliu@hut.edu.cn

Received Date: 8 June 2024
Revised Date: 6 September 2024
Accepted Date: 10 October 2024
Available Online: 11 October 2024

Figures(7)

A dual S-scheme g-C₃N₄/Ag₃PO₄/g-C₃N₅ heterojunction was prepared by decomposition methods, and it displayed enhanced performance to degrade tetracycline hydrochloride with the ideal stability under different water substrates and ions. Comparing with three single components, as g-C₃N₄, g-C₃N₅, and Ag₃PO₄, the dual S-scheme g-C₃N₄/Ag₃PO₄/g-C₃N₅ heterojunction displayed 4.4-, 3.4-, and 2.5-times enhancements in the tetracycline hydrochloride removal. Based on the dynamics analyses for charge carriers and band structure calculations, two channels of molecular oxygen activation (MOA) between Ag₃PO₄ and g-C₃N₄ (and g-C₃N₅) were confirmed. More importantly, according to this double consumption process of excited electrons, dual S-scheme g-C₃N₄/Ag₃PO₄/g-C₃N₅ could suppress the charge recombination, which was the key point to boosting photocatalytic activity. Moreover, the determination of intermediates also supported the vital role of MOA during these photocatalytic reactions. this report of two reactive sites in MOA that generate reactive oxygen species in a "V" type band structure. The electronic dynamic in the reaction was also testified by several detections, indicating the enhanced charge separation and migration from internal field effect and electron trapping from dual S-scheme mechanism. This work provides a new research direction for the design and mechanism analysis of dual S-scheme photocatalysts
- Dual S-scheme,
- Dynamics analyses,
- Photocatalytic TC degradation,
- Molecular oxygen activation,
- Carbon nitride
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Dual S-Scheme g-C3N4/Ag3PO4/g-C3N5 photocatalysts for removal of tetracycline pollutants through enhanced molecular oxygen activation

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通讯作者: 陈斌, bchen63@163.com

Dual S-Scheme g-C₃N₄/Ag₃PO₄/g-C₃N₅ photocatalysts for removal of tetracycline pollutants through enhanced molecular oxygen activation