Hierarchically porous wood/CuBTC/GO composites for efficient and selective CO2 capture

Hierarchically porous wood/CuBTC/GO composites for efficient and selective CO2 capture | 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 Hierarchically porous wood/CuBTC/GO composites for efficient and selective CO 2 capture Xinyu Li, Shijie Li, Jin Zhang, Hongyan Zhu, Jianguo Zhao This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7426670/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 19 Jan, 2026 Read the published version in Wood Science and Technology → Version 1 posted 9 You are reading this latest preprint version Abstract A composite adsorbent material for CO 2 capture was prepared using low-density, high-porosity balsa wood (BW) as the matrix, with the introduction of CuBTC and graphene oxide (GO). Characterization via scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Raman spectroscopy, and X-ray diffraction (XRD) confirmed the uniform synthesis of octahedral CuBTC within the wood pores. The introduction of GO increased the loading of CuBTC by 28.3%, with the final loading reaching 46.67%. FTIR analysis revealed interfacial interactions—hydrogen bonding and Cu 2+ coordination. Compared to pure CuBTC, the composite exhibited higher thermal stability (up to 500 K) and excellent water resistance, with minimal structural changes after 6 hours of immersion. Its microporous surface area was 229.19 m 2 ·g -1 , pore volume was 0.12 cm 3 ·g -1 , and average pore diameter was 2.01 nm. Under conditions of 298 K and 1 bar, the CO 2 adsorption capacity reached 1.93 mmol·g -1 , and it exhibited excellent cycling stability. The average CO 2 adsorption heat was 32.13 kJ·mol -1 , indicating that the adsorption mechanism was primarily physical adsorption, i.e., wood acted as a high-speed channel for CO 2 transport, while the unsaturated copper sites exposed on CuBTC in the wood pores interacted electrostatically with the quadrupole moment of CO 2 . Additionally, this composite material exhibited high CO 2 /N 2 (up to 71), outperforming pure CuBTC, highlighting its potential for application in CO 2 capture. This study is valuable for the functionalization of wood. CuBTC Wood Graphene oxide CO2 adsorption CO2/N2 selectivity Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 19 Jan, 2026 Read the published version in Wood Science and Technology → Version 1 posted Editorial decision: Revision requested 27 Oct, 2025 Reviews received at journal 18 Oct, 2025 Reviewers agreed at journal 27 Sep, 2025 Reviews received at journal 22 Sep, 2025 Reviewers agreed at journal 15 Sep, 2025 Reviewers invited by journal 15 Sep, 2025 Editor assigned by journal 15 Sep, 2025 Submission checks completed at journal 22 Aug, 2025 First submitted to journal 21 Aug, 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. We do this by developing innovative software and high quality services for the global research community. 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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-7426670","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":518864121,"identity":"508baa94-29ad-4f20-8e6a-febd945da02a","order_by":0,"name":"Xinyu Li","email":"","orcid":"","institution":"Engineering Research Center of Coal-based Ecological Carbon Sequestration Technology of the Ministry of Education, Shanxi Datong University","correspondingAuthor":false,"prefix":"","firstName":"Xinyu","middleName":"","lastName":"Li","suffix":""},{"id":518864122,"identity":"aaa47bc7-9ed9-4efd-8ea7-3ed6560a023a","order_by":1,"name":"Shijie 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capture\u003c/p\u003e","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":"wood-science-and-technology","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"wsat","sideBox":"Learn more about [Wood Science and Technology](http://link.springer.com/journal/226)","snPcode":"226","submissionUrl":"https://submission.nature.com/new-submission/226/3","title":"Wood Science and Technology","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"CuBTC, Wood, Graphene oxide, CO2 adsorption, CO2/N2 selectivity","lastPublishedDoi":"10.21203/rs.3.rs-7426670/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7426670/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eA composite adsorbent material for CO\u003csub\u003e2\u003c/sub\u003e capture was prepared using low-density, high-porosity balsa wood (BW) as the matrix, with the introduction of CuBTC and graphene oxide (GO). Characterization via scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Raman spectroscopy, and X-ray diffraction (XRD) confirmed the uniform synthesis of octahedral CuBTC within the wood pores. The introduction of GO increased the loading of CuBTC by 28.3%, with the final loading reaching 46.67%. FTIR analysis revealed interfacial interactions\u0026mdash;hydrogen bonding and Cu\u003csup\u003e2+\u003c/sup\u003e coordination. Compared to pure CuBTC, the composite exhibited higher thermal stability (up to 500 K) and excellent water resistance, with minimal structural changes after 6 hours of immersion. Its microporous surface area was 229.19 m\u003csup\u003e2\u003c/sup\u003e\u0026middot;g\u003csup\u003e-1\u003c/sup\u003e, pore volume was 0.12 cm\u003csup\u003e3\u003c/sup\u003e\u0026middot;g\u003csup\u003e-1\u003c/sup\u003e, and average pore diameter was 2.01 nm. Under conditions of 298 K and 1 bar, the CO\u003csub\u003e2\u003c/sub\u003e adsorption capacity reached 1.93 mmol\u0026middot;g\u003csup\u003e-1\u003c/sup\u003e, and it exhibited excellent cycling stability. The average CO\u003csub\u003e2\u003c/sub\u003e adsorption heat was 32.13 kJ\u0026middot;mol\u003csup\u003e-1\u003c/sup\u003e, indicating that the adsorption mechanism was primarily physical adsorption, i.e., wood acted as a high-speed channel for CO\u003csub\u003e2\u003c/sub\u003e transport, while the unsaturated copper sites exposed on CuBTC in the wood pores interacted electrostatically with the quadrupole moment of CO\u003csub\u003e2\u003c/sub\u003e. Additionally, this composite material exhibited high CO\u003csub\u003e2\u003c/sub\u003e/N\u003csub\u003e2\u003c/sub\u003e (up to 71), outperforming pure CuBTC, highlighting its potential for application in CO\u003csub\u003e2\u003c/sub\u003e capture. This study is valuable for the functionalization of wood.\u003c/p\u003e","manuscriptTitle":"Hierarchically porous wood/CuBTC/GO composites for efficient and selective CO2 capture","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-09-23 13:45:09","doi":"10.21203/rs.3.rs-7426670/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"decision","content":"Revision requested","date":"2025-10-27T15:30:41+00:00","index":"","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2025-10-18T17:33:31+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"203218875519217817681071754180218743001","date":"2025-09-27T15:50:59+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2025-09-22T07:40:12+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"104129946905041921079311203670349666830","date":"2025-09-16T00:57:16+00:00","index":"hide","fulltext":""},{"type":"reviewersInvited","content":"","date":"2025-09-15T15:43:49+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2025-09-15T15:28:58+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2025-08-22T13:21:36+00:00","index":"","fulltext":""},{"type":"submitted","content":"Wood Science and Technology","date":"2025-08-21T13:17:45+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"wood-science-and-technology","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"wsat","sideBox":"Learn more about [Wood Science and Technology](http://link.springer.com/journal/226)","snPcode":"226","submissionUrl":"https://submission.nature.com/new-submission/226/3","title":"Wood Science and Technology","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false}}],"origin":"","ownerIdentity":"c7777938-de0a-4a4f-bc25-84f484aaf149","owner":[],"postedDate":"September 23rd, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[],"tags":[],"updatedAt":"2026-01-26T16:09:58+00:00","versionOfRecord":{"articleIdentity":"rs-7426670","link":"https://doi.org/10.1007/s00226-025-01740-9","journal":{"identity":"wood-science-and-technology","isVorOnly":false,"title":"Wood Science and Technology"},"publishedOn":"2026-01-19 15:58:09","publishedOnDateReadable":"January 19th, 2026"},"versionCreatedAt":"2025-09-23 13:45:09","video":"","vorDoi":"10.1007/s00226-025-01740-9","vorDoiUrl":"https://doi.org/10.1007/s00226-025-01740-9","workflowStages":[]},"version":"v1","identity":"rs-7426670","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-7426670","identity":"rs-7426670","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}