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Controlling polymerization deposition route for phenols removal by interfacial defect engineering via Fenton-like
Shujian Li1, Huifen Fu2, Yuchen Guo1
1Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China.
Journal of Colloid and Interface Science
|January 15, 2026
Summary
This study introduces a novel method for low-carbon wastewater treatment using asymmetric oxygen vacancies in hollow Co3O4/CeO2 composites. This approach effectively removes chemical oxygen demand (COD) via polymerization-deposition (PD) even with minimal oxidant.
Area of Science:
- Materials Science
- Environmental Chemistry
- Catalysis
Background:
- The polymerization-deposition (PD) pathway is a promising low-carbon wastewater treatment strategy.
- Challenges remain in achieving high efficiency with ultra-low oxidant dosages.
Purpose of the Study:
- To develop a novel catalytic material for efficient wastewater treatment under ultra-low oxidant conditions.
- To investigate the mechanism of pollutant removal dominated by the PD pathway.
Main Methods:
- Synthesis of hollow Co3O4/CeO2 composites (H-Co30Ce-Ov) using glucose-derived carbon microspheres as sacrificial templates.
- Construction of interfacial asymmetric oxygen vacancies (As-Ov) within the composite structure.
- Mechanistic studies using in situ Raman and electrochemical analyses.
Main Results:
- The H-Co30Ce-Ov composite effectively removed phenol (PN) and chemical oxygen demand (COD) via a PD-dominated process.
- Interfacial As-Ov facilitated an electron-transfer pathway (ETP) for peroxymonosulfate (PMS) activation.
- High PMS utilization efficiency and excellent catalytic activity for electron-rich pollutants were observed.
Conclusions:
- The constructed interfacial As-Ov plays a critical role in controlling PMS activation and reaction kinetics.
- This strategy offers a rational approach to enhance PD-based catalytic oxidation for wastewater treatment.
- The study provides insights into resource-oriented pollutant removal and efficient wastewater treatment solutions.
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