Citation: Zijing Guo, Yi Liang, Kaili He, Hongru Jiang, Xiang Liu, Congying Xu, Yawei Xiao, Jihui Li. Microstructure regulation to manifold catalysis sites of magnetic hydrochar for enhancing Fenton-like degradation of tetracycline[J]. Chinese Chemical Letters, ;2026, 37(2): 111306. doi: 10.1016/j.cclet.2025.111306 shu

Microstructure regulation to manifold catalysis sites of magnetic hydrochar for enhancing Fenton-like degradation of tetracycline

Zijing Guo ^a ,
Yi Liang ^a ,
Kaili He ^a ,
Hongru Jiang ^a ,
Xiang Liu ^b ,
Congying Xu ^a ,
Yawei Xiao ^{a, *,} ,
Jihui Li ^{a, *,}

a.
Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, China
b.
College of Materials and Chemical Engineering, China Three Gorges University, Yichang 443002, China

ywxiao@hainanu.edu.cn

lijihui@hainanu.edu.cn

Received Date: 26 November 2024
Revised Date: 6 April 2025
Accepted Date: 12 May 2025
Available Online: 13 May 2025

Figures(7)

Oxidative magnetization has attracted great attention as an efficient strategy for modulating physiochemical properties of magnetic biochar. In this paper, a K₂FeO₄-involving hydrothermal oxidative magnetization was explored to regulate multiple micro-structures for manufacture magnetic hydrochar (MHC) for Fenton-like degradation of tetracycline in aqueous solution. Diverse shapes of Fe₃O₄ and nano zero-valent iron (nZVI) were doped with abundant oxygen containing groups and persistent free radicals (PFRs). Multiple catalysis sites including iron species, PFRs, oxygen containing groups, and graphite defects contributed to accelerate the Fenton-like degradation with synergistic effect. Notably, MHC achieved a tetracycline removal rate of 99% within 60 min at 50 mg/L, with a total organic carbon (TOC) removal rate of 35%. Furthermore, after four cycles of reuse, the degradation efficiency slightly decreased to 93%. This study highlights the potential of magnetic hydrochar with multiple catalytic sites in the effective and sustainable degradation of pollutants.
- Magnetic hydrochar,
- Fenton-like degradation,
- Diverse shapes of iron species,
- Multiple catalysis sites,
- Tetracycline
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