Citation: Ming-Zhen Li, Yang Zhang, Kun Li, Ya-Nan Shang, Yi-Zhen Zhang, Yu-Jiao Kan, Zhi-Yang Jiao, Yu-Yuan Han, Xiao-Qiang Cao. In situ regeneration of catalyst for Fenton-like degradation by photogenerated electron transportation: Characterization, performance and mechanism comparison[J]. Chinese Chemical Letters, ;2025, 36(1): 109885. doi: 10.1016/j.cclet.2024.109885 shu

In situ regeneration of catalyst for Fenton-like degradation by photogenerated electron transportation: Characterization, performance and mechanism comparison

Ming-Zhen Li ^a ,
Yang Zhang ^{a, b, *,} ,
Kun Li ^a ,
Ya-Nan Shang ^{a, c} ,
Yi-Zhen Zhang ^a ,
Yu-Jiao Kan ^a ,
Zhi-Yang Jiao ^a ,
Yu-Yuan Han ^a ,
Xiao-Qiang Cao ^{a, d, *,}

a.
College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
b.
Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education of China, Beijing Normal University, Beijing 100875, China
c.
Environment Research Institute, Shandong University, Qingdao 266237, China
d.
Institute of Yellow River Delta Earth Surface Processes and Ecological Integrity, Shandong University of Science and Technology, Qingdao 266590, China

Received Date: 23 December 2023
Revised Date: 31 March 2024
Accepted Date: 11 April 2024
Available Online: 13 April 2024

Figures(4)

Inactivation of carbon-based transition metal catalysts, which was caused by electron loss, limited their application in advanced oxidation processes. Therefore, Co and TiO₂ double-loaded carbon nanofiber material (Co@CNFs-TiO₂) was synthesized in this study. Photocatalytic and chemical catalytic systems were synergized efficiently. Tetracycline was eliminated within 15 min. The degradation rate remained above 90% after five cycles, and the 50% promotion proved the high stability of Co@CNFs-TiO₂. The main reactive oxygen species in this system were sulfate radicals, whereas Co and TiO₂ represented the active sites of the catalytic reaction. Electrons generated from TiO₂ during the photocatalytic process were transferred to Co, which promoted the Co(Ⅲ)/Co(Ⅱ) cycle and maintained Co in a low-valence state, thereby stimulating the generation of sulfate radicals. In this study, the effective regulation of reactive oxygen species in the reaction system was realized. The results provided a guidance for in situ electron replenishment and regeneration of carbon-based transition metal catalysts, which will expand the practical application of advanced oxidation processes.
- Electron transportation,
- Catalyst regeneration,
- Peroxymonosulfate,
- Co,
- Photocatalytic
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