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Stability of Polymeric Membranes to UV Exposure before and after Coating with TiO2 Nanoparticles

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dc.contributor.authorLabuto, Geórgia
dc.contributor.authorSanches, Sandra
dc.contributor.authorCrespo, João Goulão
dc.contributor.authorPereira, Vanessa J.
dc.contributor.authorHuertas Penela, Rosa María
dc.contributor.funderFundação para a Ciência e a Tecnologia en Portugal
dc.date.accessioned2025-09-19T08:27:11Z
dc.date.available2025-09-19T08:27:11Z
dc.date.issued2021-12-30
dc.descriptionThe registered version of this article, first published in “Polymers, 14, 2022", is available online at the publisher's website: MDPI, https://doi.org/10.3390/polym14010124 La versión registrada de este artículo, publicado por primera vez en “Polymers, 14, 2022", está disponible en línea en el sitio web del editor: MDPI, https://doi.org/10.3390/polym14010124
dc.descriptionProyecto de Investigación PTDC/EQU-EPQ/29579/2017 de la 'Fundação para a Ciência e a Tecnologia en Portugal
dc.description.abstractThe combination of photocatalysis and membrane filtration in a single reactor has been proposed, since the photocatalytic treatment may degrade the pollutants retained by the membrane and reduce fouling. However, polymeric membranes can be susceptible to degradation by UV radiation and free radicals. In the present study, five commercial polymeric membranes were exposed to ultraviolet (UV) radiation before and after applying a sol–gel coating with TiO2 nanoparticles. Membrane stability was characterized by changes in hydrophilicity as well as analysis of soluble substances and nanoparticles detached into the aqueous medium, and by Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), and energy-dispersive X-ray spectrometry (EDS) for structural, morphological, and elemental distribution analysis, respectively. The TiO2 coating conferred photocatalytic properties to the membranes and protected them during 6 h of UV radiation exposures, reducing or eliminating chemical and morphological changes, and in some cases, improving their mechanical resistance. A selected commercial nanofiltration membrane was coated with TiO2 and used in a hybrid reactor with a low-pressure UV lamp, promoting photocatalysis coupled with cross-flow filtration in order to remove 17α-ethinylestradiol spiked into an aqueous matrix, achieving an efficiency close to 100% after 180 min of combined filtration and photocatalysis, and almost 80% after 90 min.en
dc.description.provenanceMade available in DSpace on 2025-09-19T08:27:11Z (GMT). No. of bitstreams: 1 Huertas Penela_ Rosa María_ Stability of Poly_ROSA MARIA HUERTAS P.pdf: 10328475 bytes, checksum: 55312fc6cf1b90aea0751b376d5b3244 (MD5) Previous issue date: 2021-12-30en
dc.description.versionversión publicada
dc.identifier.citationLabuto, G., Sanches, S., Crespo, J. G., Pereira, V. J., & Huertas, R. M. (2022). Stability of Polymeric Membranes to UV Exposure before and after Coating with TiO2 Nanoparticles. Polymers, 14(1), 124. https://doi.org/10.3390/polym14010124
dc.identifier.doihttps://doi.org/10.3390/polym14010124
dc.identifier.issn2073-4360
dc.identifier.urihttps://hdl.handle.net/20.500.14468/30092
dc.journal.issue1
dc.journal.titlePolymers
dc.journal.volume14
dc.language.isoen
dc.page.initial124
dc.publisherMDPI
dc.relation.centerFacultad de Ciencias
dc.relation.departmentCiencias y Técnicas Fisicoquímicas
dc.relation.projectidLa versión registrada de este artículo, publicado por primera vez en “Polymers, 14, 2022", está disponible en línea en el sitio web del editor: MDPI, https://doi.org/10.3390/polym14010124
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.es
dc.subject33 Ciencias Tecnológicas
dc.subject.keywordsmembrane stabilityen
dc.subject.keywordsUV photodegradationen
dc.subject.keywordsTiO2 coatingen
dc.subject.keywordshybrid reactoren
dc.subject.keywordshormone removalen
dc.titleStability of Polymeric Membranes to UV Exposure before and after Coating with TiO2 Nanoparticlesen
dc.typeartículoes
dc.typejournal articleen
dspace.entity.typePublication
relation.isAuthorOfPublication559a1645-c7e7-4e61-a6dc-ff71cd98d6f5
relation.isAuthorOfPublication.latestForDiscovery559a1645-c7e7-4e61-a6dc-ff71cd98d6f5
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