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Dimpled SiO2@γ-Fe2O3 nanocomposites – fabrication and use for arsenic adsorption in aqueous medium

hal.structure.identifierDepartment of Physics and Astronomy [UCL London]
hal.structure.identifierUCL Healthcare Biomagnetic and Nanomaterials Laboratories
dc.contributor.authorDEEPRASERT, Saruta
hal.structure.identifierDepartment of Physics and Astronomy [UCL London]
hal.structure.identifierUCL Healthcare Biomagnetic and Nanomaterials Laboratories
dc.contributor.authorWANG, Lilin
hal.structure.identifierAristotle University of Thessaloniki
dc.contributor.authorSIMEONIDIS, Konstantinos
hal.structure.identifierDepartment of Physics and Astronomy [UCL London]
hal.structure.identifierUCL Healthcare Biomagnetic and Nanomaterials Laboratories
dc.contributor.authorTHANH, Nguyen Thi Kim
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDUGUET, Etienne
hal.structure.identifierDepartment of Physics and Astronomy [UCL London]
hal.structure.identifierUCL Healthcare Biomagnetic and Nanomaterials Laboratories
dc.contributor.authorMOURDIKOUDIS, Stefanos
dc.date.issued2021
dc.description.abstractEnWe report the synthesis of nanocomposites made of silica nanoparticles whose six surface dimples are decorated with magnetic maghemite nanoparticles and their use for detection and recovery of arsenic in aqueous media. Precursor silica nanoparticles have aminated polystyrene chains at the bottom of their dimples and the maghemite nanoparticles are surface functionalized with carboxylic acid groups in two steps: amination with 3-aminopropyltrimethoxysilane, then derivatization with succinic anhydride in the presence of triethylamine. In the end, the colloidal assembly consists of the regioselective grafting of the carboxylic acid-modified iron oxide nanoparticles onto the 6-dimple silica nanoparticles. Several characterization techniques such as transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), dynamic light scattering (DLS) are employed to assess the grafting process and study the influence of the maghemite functional groups on the quality of the composites formed. The resulting magnetic nanocomposites are used for the environmentally benign detection and removal of arsenic from aqueous medium, being readily extracted through means of magnetic separation.
dc.description.sponsorshipDilater le système atomique conventionnel à l'échelle colloïdale grâce à des particules préprogrammées pour une valence donnée - ANR-15-CE09-0010
dc.description.sponsorshipInitiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.title.enDimpled SiO2@γ-Fe2O3 nanocomposites – fabrication and use for arsenic adsorption in aqueous medium
dc.typeArticle de revue
dc.identifier.doi10.1039/d0ra09907d
dc.subject.halChimie/Matériaux
bordeaux.journalRSC Advances
bordeaux.page1343-1353
bordeaux.volume11
bordeaux.issue3
bordeaux.peerReviewedoui
hal.identifierhal-03131604
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03131604v1
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