Citation: Xianghan Cheng, Xiaoli Wang, Zhen Li, Ping Niu, Junjie Tian, Yong-Zheng Zhang, Da-Shuai Zhang, Xiuling Zhang, Weixuan Huang, Longlong Geng, Xing Xu. Unraveling crystalline-phase-effect of CoSe for highly efficient and robust Fenton-like catalysis: A combined experimental and theoretical study[J]. Chinese Chemical Letters, ;2026, 37(9): 112296. doi: 10.1016/j.cclet.2025.112296 shu

Unraveling crystalline-phase-effect of CoSe for highly efficient and robust Fenton-like catalysis: A combined experimental and theoretical study

Xianghan Cheng ^a ,
Xiaoli Wang ^a ,
Zhen Li ^{a, *,} ,
Ping Niu ^a ,
Junjie Tian ^{a, c} ,
Yong-Zheng Zhang ^a ,
Da-Shuai Zhang ^a ,
Xiuling Zhang ^a ,
Weixuan Huang ^d ,
Longlong Geng ^{a, *,} ,
Xing Xu ^{b, *,}

a.
Shandong Provincial Key Laboratory of Monocrystalline Silicon Semiconductor Materials and Technology, College of Chemistry and Chemical Engineering, Dezhou University, Dezhou 253023, China
b.
School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
c.
Dezhou Green Chemical and Environmental Catalysis Engineering Research Center, Dezhou Luba Fine Chemical Co., Ltd., Dezhou 253023, China
d.
Faculty of Education and Liberal Arts, NTI International University, Persiaran Perdana BBN, Putra Nilai, 71800 Nilai, Negeri Sembilan, Malaysia

lizhendiyi@163.com

llgeng@dzu.edu.cn

xuxing@sdu.edu.cn

Received Date: 28 July 2025
Revised Date: 12 October 2025
Accepted Date: 17 December 2025
Available Online: 18 December 2025

Figures(5)

The development of novel catalysts with both robust activity and long-term stability is significant but remains a critical challenge for the degradation of emerging pollutants. Herein, CoSe nanocrystal-embedded amorphous carbon (CoSe/MC) was rationally designed and synthesized via an in situ selenization strategy. Interestingly, the unique hierarchical architecture featuring CoSe nanocrystal cores and carbon shells simultaneously exposes abundant accessible active sites and enhances stability during the Fenton-like process. Under ambient conditions, CoSe/MC achieves 97% tetracycline (TC) degradation within 2 min, with a rate constant of 3.74 × 10^–2 s^-1, which is 7.3-fold faster than Co₃O₄/C. Furthermore, CoSe/MC exhibits remarkable versatility across a wide pH range (3–11), various water sources (e.g., river/lake water), and diverse pollutants (e.g., antibiotics/dyes). Continuous-flow tests confirm long-term stability (>95% efficiency over 300 min) with negligible metal leaching (<0.1 mg/L Co). Mechanistic studies reveal a synergistic radical/non-radical pathway dominated by ¹O₂ generation, validated by EPR spectroscopy and quenching experiments. Density functional theory (DFT) calculations further elucidate the key role of CoSe in activating PMS by elongating O–O bonds considerably and accelerating electron transfer, which synergistically promotes O–O cleavage and the generation of reactive oxygen species during TC degradation.
- Advanced oxidation process,
- Crystal phase engineering,
- CoSe nanocrystals,
- PMS activation,
- Tetracycline degradation
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