A Dual-Function Platform of green Cobalt Oxide nanoparticles for antimicrobial activity and High-Performance Symmetric Supercapacitors

A Dual-Function Platform of green Cobalt Oxide nanoparticles for antimicrobial activity and High-Performance Symmetric Supercapacitors | 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 A Dual-Function Platform of green Cobalt Oxide nanoparticles for antimicrobial activity and High-Performance Symmetric Supercapacitors Padma Priya Gopalakrishnan, Thiyagaraj S This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6871186/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 21 Aug, 2025 Read the published version in Journal of Inorganic and Organometallic Polymers and Materials → Version 1 posted 23 You are reading this latest preprint version Abstract In this study, cobalt oxide (Co 3 O 4 ) nanoparticles were synthesized via a green extraction method using Aloe vera as a bio-reducing agent. Fundamental characterizations of the synthesized Co 3 O 4 were carried out using Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM), and Energy-Dispersive X-ray Analysis (EDAX). The minimum inhibitory concentration (MIC) and antimicrobial activity were evaluated against Bacillus cereus , Escherichia coli , and Pseudomonas aeruginosa , with zones of inhibition measured in millimeters after incubation. The Co 3 O 4 nanoparticles were then coated onto Aluminum plate of (1 x 1 x 0.1 cm) and assembled in a symmetric two-electrode supercapacitor configuration using a Na₂SO₄ electrolyte. Galvanostatic charge–discharge (GCD) testing at 50 µA revealed nearly symmetric charge–discharge curves, indicating excellent capacitive behavior. The system exhibited a specific capacitance of 314.8 F/g, with an energy density of 39.88 Wh/kg and a power density of 8,451.4 W/kg. Minimal resistance variation after cycling and a Coulombic efficiency approaching ~ 100% confirmed the system’s outstanding cyclic stability and potential for high-performance energy storage applications. Green synthesis Cobalt oxide nanoparticles antimicrobial activity Supercapacitor Al-Plate (1 x 1 x 0.1 cm) electrode Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 21 Aug, 2025 Read the published version in Journal of Inorganic and Organometallic Polymers and Materials → Version 1 posted Editorial decision: Revision requested 15 Jun, 2025 Reviews received at journal 15 Jun, 2025 Reviews received at journal 15 Jun, 2025 Reviewers agreed at journal 15 Jun, 2025 Reviewers agreed at journal 15 Jun, 2025 Reviewers agreed at journal 14 Jun, 2025 Reviewers agreed at journal 14 Jun, 2025 Reviewers agreed at journal 14 Jun, 2025 Reviewers agreed at journal 13 Jun, 2025 Reviewers agreed at journal 13 Jun, 2025 Reviewers agreed at journal 13 Jun, 2025 Reviews received at journal 13 Jun, 2025 Reviewers agreed at journal 13 Jun, 2025 Reviewers agreed at journal 13 Jun, 2025 Reviewers agreed at journal 13 Jun, 2025 Reviewers agreed at journal 13 Jun, 2025 Reviewers agreed at journal 13 Jun, 2025 Reviewers agreed at journal 13 Jun, 2025 Reviewers agreed at journal 13 Jun, 2025 Reviewers invited by journal 13 Jun, 2025 Editor assigned by journal 12 Jun, 2025 Submission checks completed at journal 12 Jun, 2025 First submitted to journal 11 Jun, 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-6871186","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":471560284,"identity":"2e18f133-2f58-4071-b5f0-f4b399945597","order_by":0,"name":"Padma Priya Gopalakrishnan","email":"","orcid":"","institution":"Jain (deemed to be) University","correspondingAuthor":false,"prefix":"","firstName":"Padma","middleName":"Priya","lastName":"Gopalakrishnan","suffix":""},{"id":471560285,"identity":"f67420ae-b1c1-4cf7-ba62-96a667a22009","order_by":1,"name":"Thiyagaraj S","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAABSklEQVRIie2RMUvDQBTHXzhIHJ66RgjmK7wQsBZK7qtcCHSqUiiI0EIjQlwCrhU/hYtzykG6HJ2dJF2cOsStgopJW5S0xVkwPzh4vHs/7n93ADU1fxMdxLqiHAHLIln1V+CWwX4UZ1RR9F+U77K6q2+OrrDDwzSbRZ53ey+zXsvyrIZ5NpZ4+cwP7JhgMQCrUVUoYQb5URCMpm1yOxhgc3QuJKqeH+lIWpwCNsOqUgQz/YgFoKBUGNJTh8Z3kRB6ocB+CEjJRrClMgxsZeTuKQ7XyqfgpaJ9bCuQLBXpkUJyAeVSSV5DoZXB2I5TSLITU0wnwlHYdWKcIKk5JXkqiru0u9JKza1gN1cvR4uLPj9WxiO9xX1Ok46bi4Hg9rV8mM0HLb4ZjBVL08EvXkUvHqiyt1cOm7t/5x14aWewqLSNbPd4TU1NzT/jCzlSaxSaTnHDAAAAAElFTkSuQmCC","orcid":"","institution":"Jain (deemed to be) University","correspondingAuthor":true,"prefix":"","firstName":"Thiyagaraj","middleName":"","lastName":"S","suffix":""}],"badges":[],"createdAt":"2025-06-11 11:08:32","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-6871186/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6871186/v1","draftVersion":[],"editorialEvents":[{"content":"https://doi.org/10.1007/s10904-025-03988-x","type":"published","date":"2025-08-21T16:29:06+00:00"}],"editorialNote":"","failedWorkflow":false,"files":[{"id":89847740,"identity":"b6ce46d0-e3e0-4dab-adcf-c99dbf48edf2","added_by":"auto","created_at":"2025-08-25 16:44:12","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":907954,"visible":true,"origin":"","legend":"","description":"","filename":"ResearchPaper.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6871186/v1_covered_a3e7c98d-7d9c-434d-aafd-981710ee25e2.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"A Dual-Function Platform of green Cobalt Oxide nanoparticles for antimicrobial activity and High-Performance Symmetric Supercapacitors","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"journal-of-inorganic-and-organometallic-polymers-and-materials","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"joip","sideBox":"Learn more about [Journal of Inorganic and Organometallic Polymers and Materials](https://www.springer.com/journal/10904)","snPcode":"10904","submissionUrl":"https://submission.nature.com/new-submission/10904/3","title":"Journal of Inorganic and Organometallic Polymers and Materials","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"Green synthesis, Cobalt oxide nanoparticles, antimicrobial activity, Supercapacitor, Al-Plate (1 x 1 x 0.1 cm) electrode","lastPublishedDoi":"10.21203/rs.3.rs-6871186/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6871186/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eIn this study, cobalt oxide (Co\u003csub\u003e3\u003c/sub\u003eO\u003csub\u003e4\u003c/sub\u003e) nanoparticles were synthesized via a green extraction method using \u003cem\u003eAloe vera\u003c/em\u003e as a bio-reducing agent. 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