Self-assembly of porphyrin nanofibers on CeO 2 nanoparticles: an enhanced photocatalyst for organic pollutant degradation under visible light irradiation

Self-assembly of porphyrin nanofibers on CeO 2 nanoparticles: an enhanced photocatalyst for organic pollutant degradation under visible light irradiation | 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 Self-assembly of porphyrin nanofibers on CeO 2 nanoparticles: an enhanced photocatalyst for organic pollutant degradation under visible light irradiation Kieu Anh Thi Vo, Duy Van Lai, Nam Thi Pham, Lam Dai Tran, Thanh Tung Nguyen, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6487254/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 16 You are reading this latest preprint version Abstract This study investigates the synthesis and photocatalytic performance of CeO 2 /porphyrin nanocomposites, created by self-assembling porphyrin monomers onto CeO 2 nanoparticles, which were green-synthesized using Cleistocalyx operculatus leaf extract. The resulting CeO 2 /porphyrin composite showed enhanced photocatalytic efficiency for degrading organic pollutants, such as methylene blue and rhodamine B, compared to individual CeO 2 nanoparticles and free porphyrin aggregates. CeO 2 nanoparticles were characterized by SEM, XRD, FTIR, EDX, and UV-Vis, confirming successful synthesis and their crystalline integrity. The porphyrin TCPP (Tetrakis(4-carboxyphenyl)porphyrin) was integrated via a reprecipitation method, and SEM and XRD analysis verified the uniform incorporation of TCPP onto CeO 2 nanoparticles, preserving the nanofiber morphology and a crystalline structure with an average size of 9 nm. The CeO 2 /TCPP composite exhibited extended visible light absorption, as shown in UV-Vis diffuse reflectance spectra, indicating its potential for photocatalytic applications under visible light. Photocatalytic tests under simulated sunlight demonstrated a significant improvement in performance, with a 95.9% degradation of Rhodamine B after 120 minutes, particularly at a CeO 2 :TCPP ratio of 10:1. This research highlights the effective synergy between CeO 2 and porphyrin materials, providing a novel approach for developing efficient, green-synthesized nanocomposites for environmental remediation under visible light, marking a significant contribution to photocatalytic technology. CeO 2 /Porphyrin Nanocomposites Green Synthesis Photocatalytic Degradation Methylene Blue Rhodamine B Visible Light Absorption Full Text Additional Declarations No competing interests reported. Supplementary Files SupportingInformation.docx Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 14 May, 2025 Reviews received at journal 13 May, 2025 Reviews received at journal 13 May, 2025 Reviews received at journal 08 May, 2025 Reviews received at journal 07 May, 2025 Reviewers agreed at journal 06 May, 2025 Reviewers agreed at journal 03 May, 2025 Reviewers agreed at journal 02 May, 2025 Reviewers agreed at journal 02 May, 2025 Reviewers agreed at journal 02 May, 2025 Reviewers agreed at journal 01 May, 2025 Reviewers agreed at journal 01 May, 2025 Reviewers invited by journal 01 May, 2025 Editor assigned by journal 29 Apr, 2025 Submission checks completed at journal 28 Apr, 2025 First submitted to journal 19 Apr, 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-6487254","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":451577608,"identity":"f4c3bd02-125f-424c-8ef4-4ebde3f7a405","order_by":0,"name":"Kieu Anh Thi Vo","email":"","orcid":"","institution":"Vietnam Academy of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"Kieu","middleName":"Anh Thi","lastName":"Vo","suffix":""},{"id":451577609,"identity":"77b97d4a-329d-4086-8bcb-55a486d1705e","order_by":1,"name":"Duy Van Lai","email":"","orcid":"","institution":"Vietnam Academy of Science and 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