Engineering a High-Performance Co/MPC Catalyst via Microwave- Assisted Pyrolysis for Rapid Atrazine Elimination through PMS Activation

Engineering a High-Performance Co/MPC Catalyst via Microwave- Assisted Pyrolysis for Rapid Atrazine Elimination through PMS Activation | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Engineering a High-Performance Co/MPC Catalyst via Microwave- Assisted Pyrolysis for Rapid Atrazine Elimination through PMS Activation Mei Wang, Tong Wu, Xianghai Song, Quan Bu, Bingliang Zhou This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8371860/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 13 You are reading this latest preprint version Abstract This study presents a high-performance cobalt catalyst supported on microwave-pyrolyzed biochar (Co/MPC) for efficient peroxymonosulfate (PMS) activation to degrade atrazine (ATZ). The microwave-assisted pyrolysis (MWP) technique yielded biochar (MPC) with superior textural properties—specifically, a significantly higher specific surface area (214.18 m²/g) and pore volume (0.46 cm³/g)—compared to conventionally pyrolyzed biochar (BC). This enhanced porous structure facilitated the uniform dispersion of ~ 5 nm cobalt nanoparticles, resulting in the highly active Co/MPC catalyst. The Co/MPC + PMS system achieved over 99% ATZ degradation within just 5 minutes, outperforming its conventionally prepared counterpart (Co/BC). The catalyst demonstrated robust performance across a range of PMS dosages and pollutant concentrations, and exhibited strong tolerance to common coexisting anions. Radical quenching experiments and electron paramagnetic resonance (EPR) analysis identified hydroxyl radicals (•OH) and sulfate radicals (SO₄•⁻) as the dominant reactive species responsible for the rapid degradation. This work highlights the significant advantage of microwave-assisted synthesis in creating advanced carbon-metal catalysts and offers a highly efficient, stable, and practical solution for the remediation of persistent organic pollutants like ATZ without requiring additional energy input. Atrazine Peroxymonosulfate microwave-assisted pyrolysis biochar Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 09 Feb, 2026 Reviews received at journal 09 Feb, 2026 Reviews received at journal 09 Feb, 2026 Reviewers agreed at journal 03 Feb, 2026 Reviewers agreed at journal 01 Feb, 2026 Reviewers agreed at journal 29 Jan, 2026 Reviewers agreed at journal 08 Jan, 2026 Reviews received at journal 06 Jan, 2026 Reviewers agreed at journal 28 Dec, 2025 Reviewers invited by journal 26 Dec, 2025 Editor assigned by journal 26 Dec, 2025 Submission checks completed at journal 26 Dec, 2025 First submitted to journal 15 Dec, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8371860","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":566535866,"identity":"bd5c6a84-39ec-4fde-8a84-75dd2d54c3d9","order_by":0,"name":"Mei Wang","email":"","orcid":"","institution":"Jiangsu University","correspondingAuthor":false,"prefix":"","firstName":"Mei","middleName":"","lastName":"Wang","suffix":""},{"id":566535868,"identity":"ce5fc593-78da-488b-8c79-e0c8c9c9e171","order_by":1,"name":"Tong Wu","email":"","orcid":"","institution":"Jiangsu 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The microwave-assisted pyrolysis (MWP) technique yielded biochar (MPC) with superior textural properties\u0026mdash;specifically, a significantly higher specific surface area (214.18 m\u0026sup2;/g) and pore volume (0.46 cm\u0026sup3;/g)\u0026mdash;compared to conventionally pyrolyzed biochar (BC). This enhanced porous structure facilitated the uniform dispersion of ~\u0026thinsp;5 nm cobalt nanoparticles, resulting in the highly active Co/MPC catalyst. The Co/MPC\u0026thinsp;+\u0026thinsp;PMS system achieved over 99% ATZ degradation within just 5 minutes, outperforming its conventionally prepared counterpart (Co/BC). The catalyst demonstrated robust performance across a range of PMS dosages and pollutant concentrations, and exhibited strong tolerance to common coexisting anions. Radical quenching experiments and electron paramagnetic resonance (EPR) analysis identified hydroxyl radicals (\u0026bull;OH) and sulfate radicals (SO₄\u0026bull;⁻) as the dominant reactive species responsible for the rapid degradation. 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