Magnetic mesoporous Co/Ni ZIF-derived core-shell hollow nanocages for efficient removal of organic pollutants

Magnetic mesoporous Co/Ni ZIF-derived core-shell hollow nanocages for efficient removal of organic pollutants | 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 Magnetic mesoporous Co/Ni ZIF-derived core-shell hollow nanocages for efficient removal of organic pollutants Yuanteng Shi, Nan Li, Jingjie Chen, Lei Liu, Xingjie Xu, Jin Chai, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7042728/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 07 Oct, 2025 Read the published version in Journal of Nanoparticle Research → Version 1 posted 13 You are reading this latest preprint version Abstract In view of the urgent need for efficient and low-cost treatment of organic pollutants in printing and dyeing wastewater, magnetic porous adsorption materials have received extensive attention due to their advantages of high efficiency and reusability. Herein, magnetic bimetallic zeolitic imidazolate framework (mZIFs) nanoparticles with Fe 3 O 4 cores were firstly synthesized as a precursor. Subsequently, the novel hollow mZIFs core-shell nanocages (defined as mNCs) were developed via a facile etching method with tannic acid for the efficient removal of organic pollutants from wastewater. The mNCs demonstrated exceptional adsorption capacities, reaching up to 879.49 mg/g for methylene blue (MB) and 262.50 mg/g for tetracycline hydrochloride (TC) at 303 K, with adsorption behavior conforming to the pseudo-second-order kinetic model and the Langmuir isotherm. Thermodynamic analysis revealed that the adsorption of MB and TC by mNCs is a spontaneous and endothermic process. The regenerating rate of the mNCs for MB removal was over 80% even after five adsorption-desorption cycles. These results highlight the potential of mNCs as a highly efficient and reusable adsorbent for the removal of organic contaminants in wastewater treatment applications. mesoporous nanoparticles adsorption wastewater organic contaminant Full Text Additional Declarations No competing interests reported. Supplementary Files Highlights.doc GraphicalAbstract.doc Cite Share Download PDF Status: Published Journal Publication published 07 Oct, 2025 Read the published version in Journal of Nanoparticle Research → Version 1 posted Editorial decision: Revision requested 01 Aug, 2025 Reviews received at journal 01 Aug, 2025 Reviews received at journal 31 Jul, 2025 Reviews received at journal 28 Jul, 2025 Reviewers agreed at journal 10 Jul, 2025 Reviews received at journal 10 Jul, 2025 Reviewers agreed at journal 08 Jul, 2025 Reviewers agreed at journal 08 Jul, 2025 Reviewers agreed at journal 08 Jul, 2025 Reviewers invited by journal 08 Jul, 2025 Editor assigned by journal 07 Jul, 2025 Submission checks completed at journal 06 Jul, 2025 First submitted to journal 03 Jul, 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. 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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-7042728","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":482667141,"identity":"13433947-c732-401e-813e-157117527bff","order_by":0,"name":"Yuanteng Shi","email":"","orcid":"","institution":"Northwestern Polytechnical University (NPU)","correspondingAuthor":false,"prefix":"","firstName":"Yuanteng","middleName":"","lastName":"Shi","suffix":""},{"id":482667142,"identity":"f697898c-3660-4ed7-95aa-1ddd0ad62188","order_by":1,"name":"Nan Li","email":"","orcid":"","institution":"Sichuan University of Science and 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