Citation: Qiuwen Wang, Linlin Liang, Zexun Li, Jinyu Zhu, Kang Wang, Fuqiang Zhang, Zhijun Ren, Pengfei Wang. Constructing Fe-S bond enhanced charge transfer in α-Fe₂O₃/Cd_0.9Zn_0.1S S-scheme heterojunction for simultaneous oxidation of ciprofloxacin and reduction of Cr(Ⅵ)[J]. Chinese Chemical Letters, ;2026, 37(6): 112066. doi: 10.1016/j.cclet.2025.112066 shu

Constructing Fe-S bond enhanced charge transfer in α-Fe₂O₃/Cd_0.9Zn_0.1S S-scheme heterojunction for simultaneous oxidation of ciprofloxacin and reduction of Cr(Ⅵ)

Qiuwen Wang ^{a, 1} ,
Linlin Liang ^{a, 1} ,
Zexun Li ^a ,
Jinyu Zhu ^a ,
Kang Wang ^a ,
Fuqiang Zhang ^a ,
Zhijun Ren ^{a, b, *,} ,
Pengfei Wang ^{a, c, *,}

a.
School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
b.
School of Chemical Engineering and Technology, Xinjiang University, Urumchi 830017, China
c.
College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China

renzhijun2003@126.com

pengfeiwang@hebut.edu.cn

Received Date: 25 April 2025
Revised Date: 8 September 2025
Accepted Date: 5 November 2025
Available Online: 6 November 2025

Figures(8)

The simultaneous removal of antibiotics and heavy metals from wastewater remains a complex and challenging task. A stable α-Fe₂O₃/Cd_0.9Zn_0.1S catalyst with rod structure is constructed for simultaneous oxidation of ciprofloxacin and reduction of Cr(Ⅵ) via the in situ growth of α-Fe₂O₃ nanodots on Cd_0.9Zn_0.1S nanorod using lattice matching. The unique in situ growth pattern not only strengthens light absorption but also improves electron transfer capacity. The formed iron-sulfur (Fe-S) bonds improved the poor contact at the heterojunction interface, effectively promoted charge separation, and successfully suppressed photocorrosion. Consequently, the S-scheme heterojunction with the synergistic effect of rod structure and chemical bonds significantly enhances photocatalytic performance. Under the coexisting pollutant system, photocatalytic reaction rate constants of α-Fe₂O₃/Cd_0.9Zn_0.1S under optimal composite ratio conditions were 1.5-times (ciprofloxacin) and 5.1-times (Cr(Ⅵ)) higher than Cd_0.9Zn_0.1S. Benefiting from the dual action of active free radicals and the internal electric field stimulating electron transfer and utilization, the photocatalytic membrane technology has demonstrated the possibility of practical wastewater in a photocatalytic system.
- In situ growth,
- Interfacial Fe-S bond,
- S-scheme heterojunction,
- Inbuilt electric field,
- Photocatalytic membrane
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Constructing Fe-S bond enhanced charge transfer in α-Fe2O3/Cd0.9Zn0.1S S-scheme heterojunction for simultaneous oxidation of ciprofloxacin and reduction of Cr(Ⅵ)

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通讯作者: 陈斌, bchen63@163.com

Constructing Fe-S bond enhanced charge transfer in α-Fe₂O₃/Cd_0.9Zn_0.1S S-scheme heterojunction for simultaneous oxidation of ciprofloxacin and reduction of Cr(Ⅵ)