Breaking 118-year paradigm：Selective Quantitative Bromide Capture from Seawater RO Brine: Conducting Polymer Nanofibers 126 mg/g >> COF 23 mg/g

Breaking 118-year paradigm：Selective Quantitative Bromide Capture from Seawater RO Brine: Conducting Polymer Nanofibers 126 mg/g >> COF 23 mg/g | 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 Breaking 118-year paradigm：Selective Quantitative Bromide Capture from Seawater RO Brine: Conducting Polymer Nanofibers 126 mg/g >> COF 23 mg/g 陶玉仑 This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9535300/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Since Kubierschky's 1906 invention, the global bromine industry has been constrained by the "evaporite rule"—industrial extraction requires brine concentrations ≥2000 ppm, rendering desalination brine (80 ppm Br⁻) economically inaccessible. Despite a 118-year of research, no material has achieved >100 mg/g selective bromide Br⁻ capture in real seawater desalination brine. We report that polyaniline nanofibers (PANI-NF, Ø 60–80 nm) achieve 126 mg/g Br⁻ capacity—the highest selective bromide capture record for any material operating in real desalination brine desalination brine. It surpassing reported values for Ag-modified zeolites 8 mg/g and COF-based materials 23 mg/g. Multi-peak Raman enhancement provides molecular proof: the 605 cm⁻¹ ν(N···Br···N) mode intensifies 4.2×, while ν(C–N⁺•) at 1400 cm⁻¹ surges 8.5×, with Cl⁻-loaded PANI showing no 605 cm⁻¹ peak, confirming α(Br/Cl) ≥ 50 selectivity. Nanoscience Br⁻ real seawater desalination brine polyaniline (PANI) nanofibers DFT calculations Full Text Additional Declarations The authors declare no competing interests. Cite Share Download PDF Status: Posted Version 1 posted 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. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. 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-9535300","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":629928259,"identity":"bd725410-a400-4c59-b879-1ea47c934d02","order_by":0,"name":"陶玉仑","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAABA0lEQVRIie3QMUvEMBTA8cRApqddXymcfoRIoQgW/CAuKUI2wQ9Qzh6CtxS76rdQBOfKg7ul4FrIUvELnIt0Unt1E9ri5pD/9Ib8SPIYc7n+Y0IsSt1P3vtb28YzTwhqxgnPtgS7MQx5bkJ/KY0av6Yj7IdEAZOU3L/AAY4Bte5Ikz7NvWVmggsQ/JGAKZbGp4OEtg9bWcSqpOPbIyki2i0btjLn2QCJeiItsjpZ1AAgI9rTimc0QT4t7tdnDEEihFegcJIk1xZVbXYCkAqVmCAnPbmx/kNVicO7XCukbsl65C9+Qc+v7Yf1ZuucN5v267IoiJpNGg+SgfTfjrtcLpfrV9980WFnRQWJRQAAAABJRU5ErkJggg==","orcid":"","institution":"Anhui University of Science and Technology, Huainan, Anhui 232001, P. 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Despite a 118-year of research, no material has achieved \u0026gt;100 mg/g selective bromide\u0026nbsp;Br⁻ capture in real seawater desalination brine.\u003c/p\u003e\n\u003cp\u003eWe report that polyaniline nanofibers (PANI-NF, Ø 60–80 nm) achieve 126\u0026nbsp;mg/g Br⁻ capacity—the highest selective bromide\u0026nbsp;capture record for any material operating in real desalination brine\u0026nbsp;desalination brine. It surpassing reported values for Ag-modified zeolites 8 mg/g\u0026nbsp;and COF-based materials 23 mg/g. Multi-peak Raman enhancement provides molecular proof: the 605 cm⁻¹ ν(N···Br···N) mode intensifies 4.2×, while ν(C–N⁺•) at 1400 cm⁻¹ surges 8.5×, with Cl⁻-loaded PANI showing no 605 cm⁻¹ peak, confirming α(Br/Cl) ≥ 50 selectivity.\u003c/p\u003e","manuscriptTitle":"Breaking 118-year paradigm：Selective Quantitative Bromide Capture from Seawater RO Brine: Conducting Polymer Nanofibers 126 mg/g \u0026gt;\u0026gt; COF 23 mg/g","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-04-30 13:55:01","doi":"10.21203/rs.3.rs-9535300/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"5afc20e0-b05e-4a40-80f7-0c4835550220","owner":[],"postedDate":"April 30th, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":67040929,"name":"Nanoscience"}],"tags":[],"updatedAt":"2026-04-30T13:55:01+00:00","versionOfRecord":[],"versionCreatedAt":"2026-04-30 13:55:01","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-9535300","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-9535300","identity":"rs-9535300","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}