Citation: Yu Wang, Changjiang Lu, Danhua Jiao, Fei Wang, Xiaojian Gong, Tianhua Yu, Anping Wang, Chong-Chen Wang. Efficient degradation of tetracycline hydrochloride via high-redox S-scheme MOF-on-MOF heterojunction catalyst[J]. Chinese Chemical Letters, ;2026, 37(6): 111979. doi: 10.1016/j.cclet.2025.111979 shu

Efficient degradation of tetracycline hydrochloride via high-redox S-scheme MOF-on-MOF heterojunction catalyst

Yu Wang ^a ,
Changjiang Lu ^a ,
Danhua Jiao ^b ,
Fei Wang ^c ,
Xiaojian Gong ^a ,
Tianhua Yu ^{a, *,} ,
Anping Wang ^{a, *,} ,
Chong-Chen Wang ^{c, *,}

a.
Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment, Guizhou Normal University, Guiyang 550025, China
b.
School of Materials Science and Engineering, Guizhou Minzu University, Guiyang 550025, China
c.
Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation, School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China

tianhua@gznu.edu.cn

anping-wang@gznu.edu.cn

wangchongchen@bucea.edu.cn

Received Date: 20 July 2025
Revised Date: 2 October 2025
Accepted Date: 15 October 2025
Available Online: 17 October 2025

Figures(6)

The strategic engineering of heterointerface architecture is demonstrating its critical pathway for optimizing charge dynamics in metal-organic framework (MOF)-based photo-Fenton systems. This work presents a novel ZIF-8@NH₂−MIL-101(Fe) heterostructure with precisely controlled MOF-on-MOF configuration, which exhibits exceptional catalytic performance in the degradation of antibiotics. Experimental results revealed desired catalytic capacity with 91.4% tetracycline hydrochloride (TCH) degradation within a short time and satisfactory stability across pH 3.0–9.0 under visible light irradiation (λ ≥ 420 nm). Ecotoxicological assessment exhibits that the ecological risks of degradation intermediates diminish significantly when compared with those of the parent TCH. Comprehensive mechanistic investigation indicates that TCH decomposition is governed by superoxide radical (^•O₂⁻) and hydroxyl radical (^•OH) as the primary reactive species. The proposed S-scheme charge transfer mechanism is verified by Mott–Schottky analysis and in X-ray photoelectron spectroscopy. Meanwhile, the enhanced interfacial charge separation efficiency is confirmed by electrochemical impedance spectroscopy. This work not only advances the development of Fe-based MOF heterojunctions for photo-Fenton catalysis but also provides critical insights into the relationship between heterostructure engineering and catalytic efficiency.
- S-scheme heterojunction,
- MOF-on-MOF,
- Antibiotics,
- Photo-Fenton
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