Citation: Taozhen Li, Zhuohang Wu, Shu Yang, Bin Li, Semencha Alexander Vyacheslavovich, Donaev Sardor Burkhanovich, Ergashev Yorqinjon Tolqinogli, Rashidov Shokhzodbek Abduvakhobovich, Lei Wang, Jingwen Pan. Revealing the unique generation pathway of singlet oxygen from sulfate radical in Fe-based Fenton-like system[J]. Chinese Chemical Letters, ;2026, 37(9): 112443. doi: 10.1016/j.cclet.2026.112443 shu

Revealing the unique generation pathway of singlet oxygen from sulfate radical in Fe-based Fenton-like system

Taozhen Li ^{a, b} ,
Zhuohang Wu ^a ,
Shu Yang ^{a, *,} ,
Bin Li ^{c, f} ,
Semencha Alexander Vyacheslavovich ^d ,
Donaev Sardor Burkhanovich ^e ,
Ergashev Yorqinjon Tolqinogli ^e ,
Rashidov Shokhzodbek Abduvakhobovich ^e ,
Lei Wang ^a ,
Jingwen Pan ^{a, *,}

a.
Key Laboratory of Eco-chemical Engineering, College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
b.
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
c.
College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
d.
Peter the Great St. Petersburg Polytechnic University, St. Petersburg 195251, Russia
e.
Tashkent State Technical University, Tashkent 100095, Uzbekistan
f.
Qingdao Key Laboratory of Inorganic Silicide Functional Molecular Synthesis, Qingdao Meigao Group Co., Ltd., Qingdao 266108, China

ys131350@163.com

jwpan@qust.edu.cn

Received Date: 24 September 2025
Revised Date: 3 December 2025
Accepted Date: 21 January 2026
Available Online: 22 January 2026

Figures(7)

The effective Fe^Ⅱ/Fe^Ⅲ cycling and rapid activation of oxidants are the key problems that expand the application of iron-based Fenton-like reaction in water purification. Herein, bamboo-like Fe-Mo bimetallic catalysts (FeMo@CNT) were prepared to activate peroxydisulfate (PDS) for organic pollutants removal. FeMo@CNT/PDS system can completely degrade bisphenol (BPA) within 30 min (k_obs = 0.444 min^-1, which was 17.1 times that of Fe@CNT/PDS system). Results showed that singlet oxygen (¹O₂) and sulfate radical (SO₄^•-) were dominant reactive oxygen species in FeMo@CNT/PDS/BPA system, where ¹O₂ was derived from superoxide radical (O₂^•-) oxidized by SO₄^•-. Mo species in FeMo@CNT/PDS system could accelerate the O–O breaking in PDS and reduce the energy barrier of ¹O₂ production, thus achieving the increase of both SO₄^•- and ¹O₂. Meanwhile, FeMo@CNT/PDS system exhibited good catalytic activity with wide pH and multiple environmental substrates. The high oxidation performance after 23 h in dynamic experiments further demonstrated the stability of this system. And the toxicity of the original pollutants was further declined, indicating that the FeMo@CNT/PDS system was ecologically friendly. This work provides new insights for solving hindered Fe^Ⅱ/Fe^Ⅲ cycle and proves a new mechanism of ¹O₂ generation in SR-AOPs.
- Peroxydisulfate,
- Fe-based catalyst,
- Mo doping,
- Sulfate radical,
- Singlet oxygen
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