Citation: Jie Guo, Lijun Xue, Fahui Song, Chengpeng Li, Zhuo Chen, Lili Wen. Dual built-in electric field-driven S-scheme heterojunction of D-A COFs/ZnIn₂S₄ for accelerated charge separation toward high-efficiency H₂O₂ photosynthesis in pure water[J]. Acta Physico-Chimica Sinica, ;2026, 42(4): 100177. doi: 10.1016/j.actphy.2025.100177 shu

Dual built-in electric field-driven S-scheme heterojunction of D-A COFs/ZnIn₂S₄ for accelerated charge separation toward high-efficiency H₂O₂ photosynthesis in pure water

Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, Ministry of Education; College of Chemistry, Central China Normal University, Wuhan 430079, Hubei Province, China

Corresponding author: Zhuo Chen, czdwd@mails.ccnu.edu.cn Lili Wen, wenlili@ccnu.edu.cn
Received Date: 29 July 2025
Revised Date: 28 August 2025
Accepted Date: 31 August 2025

The construction of dual built-in electric field (IEF)-driven S-scheme heterojunctions presents a promising strategy to accelerate efficient charge separation and improve charge utilization in photocatalytic H₂O₂ production. Herein, we report, the construction of a heterojunction based on donor-acceptor covalent organic frameworks (D-A COFs) TpAQ (synthesized from two monomers: 1, 3, 5-triformylphloroglucinol (Tp) and 2, 6-diaminoanthraquinone (AQ)) and ZnIn₂S₄ (ZIS), realizing a dual IEF-driven S-scheme heterojunction—one from the heterojunction interface and another from D-A interface within D-A COFs. In particular, the optimized TpAQ/ZIS-10 exhibits a significantly higher visible-light driven photocatalytic H₂O₂ production rate of 2362 μmol g⁻¹ h⁻¹ in pure water than TpAQ and ZIS by utilizing both the oxygen reduction reaction and water oxidation reaction pathways. Furthermore, the experimental results and theoretical calculations revealed that the synergistic effect of dual IEF in TpAQ/ZIS heterojunction significantly facilitates efficient charge carrier transfer and separation. This work provides valuable insight for constructing highly efficient S-scheme heterojunctions with dual IEF.
- Dual built-in electric field,
- S-scheme heterojunction,
- D-A COFs,
- TpAQ/ZIS,
- Photocatalytic H₂O₂ production
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Dual built-in electric field-driven S-scheme heterojunction of D-A COFs/ZnIn2S4 for accelerated charge separation toward high-efficiency H2O2 photosynthesis in pure water

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通讯作者: 陈斌, bchen63@163.com

Dual built-in electric field-driven S-scheme heterojunction of D-A COFs/ZnIn₂S₄ for accelerated charge separation toward high-efficiency H₂O₂ photosynthesis in pure water