N-Doped Co–Mn/C Dual Metal Oxide as an Activator of Peroxymonosulfate Considering Radical and Nonradical Pathways
Source abstract
Abstract
The Mn–Co dual-metal oxide is recognized as an effective activator for peroxymonosulfate (PMS), but its activation mechanism remains controversial. In this study, a Co/Mn–C–N (CMCN) nanocatalyst was synthesized using a simple pyrolysis method, and its catalytic activity along with the PMS activation mechanism was comprehensively explored. The findings indicated that the synergistic effect of Mn and Co within the bimetallic composition significantly enhanced the catalytic efficiency of CMCN compared to those of individual metal oxides (Mn–C–N and Co–C–N). Bisphenol A underwent successful degradation within 3 min in a neutral environment, with a degradation kinetic rate of 1.59 min –1 and a total organic carbon removal efficiency of 63.8%. Moreover, CMCN nanoparticles demonstrated remarkable stability and reusability, maintaining their efficacy over four cycles. Employing a series of experiments and analytical characterizations, a novel activation mechanism for PMS was proposed, involving both radical and nonradical pathways. This mechanism involves the oxidation of organic pollutants through a direct electron transfer process from metastable intermediate complexes. Notably, the CMCN/PMS system exhibited a robust resistance to interference factors. This research provides novel insights into the development of bimetallic oxide composites for the effective removal of recalcitrant water pollutants.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced oxidation water treatment · Advanced Photocatalysis Techniques · Environmental remediation with nanomaterials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China
School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
Funding
National Key Research and Development Program of China · Anhui University · Guangzhou Municipal Science and Technology Project · National Natural Science Foundation of China · Natural Science Foundation of Anhui Province · CAS Key Laboratory of Urban Pollutant Conversion, University of Science and Technology of China · University Synergy Innovation Program of Anhui Province · Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University
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