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dc.contributor.authorMartins, P.por
dc.contributor.authorGomez, V.por
dc.contributor.authorLopes, A. C.por
dc.contributor.authorTavares, C. J.por
dc.contributor.authorBotelho, Gabrielapor
dc.contributor.authorIrusta, S.por
dc.contributor.authorLanceros-Méndez, S.por
dc.description.abstractPhotocatalysis has become an attractive process to remove contaminants from aquatic environments, with TiO2 being the most widely used photocatalyst. In spite of the advantages of the process, two main problems still have to be overcome: reutilization/recycling of TiO2 nanoparticles, which is a time-consuming and expensive process, and the fast recombination rate of the electron−hole pairs. This work reports on the photocatalytic activity of rare earth metal doped (erbium, Er) and codoped (erbium and praseodymium, Er/Pr) TiO2 nanoparticles immobilized in a poly(vinylidene difluoride)−trifluoroethylene (PVDF−TrFE) copolymer membrane as a suitable strategy to overcome the aforementioned limitations. It is shown that doped and codoped nanoparticles were successfully immobilized into the PVDF−TrFE membranes, with a controllable degree of porosity. A high surface area (273 m2/g) was attained for these nanoparticles. The low band gap (2.63 eV) of these TiO2-modified nanoparticles, coupled with a highly porous structure (∼75%) of the membrane microstructure, synergistically envisages the best photocatalytic performance by degrading 98% of a solution of methylene blue after 100 min of exposure to UV.por
dc.description.sponsorshipThis work was supported by Fundo Europeu de Desenvolvimento Regional (FEDER) through the COMPETE Program and by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Project PEST-C/FIS/UI607/2013, PEST-C/QUI/UIO686/2013 and the project Matepro -Optimizing Materials and Processes, ref NORTE-07-0124-FEDER-000037, cofunded by the Programa Operacional Regional do Norte (ON.2 - O Novo Norte), under Quadro de Referencia Estrategico Nacional (QREN), through the Fundo Europeu de Desenvolvimento Regional (FEDER). P.M.M. and A.C.L. thank the FCT for Grants SFRH/BD/98616/2013 and SFRH/BD/62507/2009, respectively.por
dc.publisherAmerican Chemical Societypor
dc.titleImproving photocatalytic performance and recyclability by development of Er-doped and Er/Pr-codoped TiO2/Poly(vinylidene difluoride)-trifluoroethylene composite membranespor
oaire.citationTitleJournal of physical chemistry Cpor
dc.subject.fosCiências Naturais::Ciências Físicaspor
dc.subject.wosScience & Technologypor
sdum.journalJournal of physical chemistry Cpor
Appears in Collections:CDF - GRF - Artigos/Papers (with refereeing)

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