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Metal nanoparticle loading of gel-brush grafted polymer fibers in membranes for catalysis

hal.structure.identifierState Key Laboratory for Modification of Chemical Fibers and Polymer Materials
hal.structure.identifierMaterials Science and Technology of Polymers, MESA+ Institute of Nanotechnology
dc.contributor.authorLIU, Yan
hal.structure.identifierMaterials Science and Technology of Polymers, MESA+ Institute of Nanotechnology
dc.contributor.authorZHANG, Kaihuan
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLI, Weiya
hal.structure.identifierState Key Laboratory for Modification of Chemical Fibers and Polymer Materials
dc.contributor.authorMA, Jinghong
hal.structure.identifierMaterials Science and Technology of Polymers, MESA+ Institute of Nanotechnology
dc.contributor.authorG. JULIUS, Vancso
dc.date.issued2018
dc.identifier.issn2050-7488
dc.description.abstractEnWe report on the preparation, characterization, and catalytic activity of microporous membranes featuring palladium (Pd) nanoparticles (NPs). The membranes consisted of polycaprolactone (PCL) microfibers featuring gel-brush layers of poly(hydroxyethyl methacrylate) (PHEMA). Pd nanoparticle loading was achieved by in situ reduction of Pd2+, coordinated to carboxylate groups in the brush, in aqueous Pd(NO3)2 electrolytes by using NaBH4. Gel-brushes were obtained via surface-initiated atom transfer radical polymerization (ATRP) polymerization. The membrane mats prior to functionalization were fabricated by electrospinning of PCL solutions. The PCL included mixtures of Br terminated PCL chains with a non-functional polymer. The electrospun fibers thus featured Br at their surface, which functioned as initiators, and allowed us to polymerize polymer gel-brushes at the fiber surface. The formation of Pd nanoparticles was evidenced by SEM and TEM. The membranes obtained had a large specific surface area and high porosity, which enabled high concentrations of metal nanoparticle loadings. The structure and morphology of the membranes were characterized by FTIR, SEM, TGA, and static contact angle measurements. The membranes obtained showed pronounced catalytic activity due to the presence of Pd NPs. As a proof-of-principle experiment we performed the catalytic reduction of 4-nitrophenol to 4-aminophenol in continuous flow-through catalysis.
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.title.enMetal nanoparticle loading of gel-brush grafted polymer fibers in membranes for catalysis
dc.typeArticle de revue
dc.identifier.doi10.1039/c8ta01231h
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Materials Chemistry A
bordeaux.page7741-7748
bordeaux.volume6
bordeaux.issue17
bordeaux.peerReviewedoui
hal.identifierhal-01916756
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01916756v1
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