One-step Sustainable Preparation of Superparamagnetic Iron Oxide Nanoparticles Supported on Mesoporous SiO2

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dc.contributor.authorChamorro, Elena
dc.contributor.authorGranados García Tenorio, María José
dc.contributor.authorCalvo Garrido, María Lourdes
dc.contributor.authorTorralvo Fernández, María José
dc.contributor.authorSáez Puche, Regino
dc.contributor.authorCabañas Poveda, Albertina
dc.date.accessioned2023-06-16T15:20:19Z
dc.date.available2023-06-16T15:20:19Z
dc.date.issued2020-05
dc.description.abstractSuperparamagnetic iron oxide nanoparticles (SPIONs) supported on high surface area mesoporous SiO2 are advanced materials of great interest in catalysis, adsorption and biomedicine. Here we present a new process to prepare SPION/SiO2 materials by the impregnation and insitu decomposition of Fe(NO3)3.9H2O on mesoporous SiO2 supports in a 25-50% mol ethanol + CO2 mixture at 523 K and 25.0 MPa. -Fe2O3 nanoparticles (NPs) of average size between 6-9 nm were distributed homogeneously on the supports. NPs deposited into the SBA-15 mesopores but mostly on the external surface of MCM-41. Materials prepared with the highest ethanol content were very homogeneous. Magnetic measurements confirmed the superparamagnetic nature of the materials at room temperature. The process proposed is sustainable and scalable, avoids tedious preparations and the additional high temperature treatment under a controlled atmosphere, as the metal decomposition is performed insitu in the CO2-expanded liquid mixture.en
dc.description.departmentDepto. de Química Física
dc.description.facultyFac. de Ciencias Químicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Ciencia, Innovación y Universidades (España)
dc.description.sponsorshipUniversidad Complutense de Madrid /Banco de Santander
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/61538
dc.identifier.doidoi.org/10.1016/j.supflu.2020.104775
dc.identifier.issn0896-8446
dc.identifier.officialurlhttps://doi.org/10.1016/j.supflu.2020.104775
dc.identifier.urihttps://hdl.handle.net/20.500.14352/6402
dc.journal.titleJournal of Supercritical Fluids
dc.language.isoeng
dc.page.initial104775
dc.page.total9
dc.publisherElsevier
dc.relation.projectID(MAT2017-84385-R and RTI2018-097230-B-I00)
dc.relation.projectIDPR75/18-21583
dc.rights.accessRightsopen access
dc.subject.cdu544
dc.subject.cdu546
dc.subject.cdu66.0
dc.subject.keywordSPION
dc.subject.keywordSupercritical CO2
dc.subject.keywordMaghemite
dc.subject.keywordMesoporous Materials
dc.subject.keywordCO2-expanded liquids
dc.subject.ucmQuímica física (Química)
dc.subject.ucmQuímica inorgánica (Química)
dc.subject.ucmBioquímica (Química)
dc.subject.unesco2303 Química Inorgánica
dc.subject.unesco3303 Ingeniería y Tecnología Químicas
dc.titleOne-step Sustainable Preparation of Superparamagnetic Iron Oxide Nanoparticles Supported on Mesoporous SiO2en
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number159
dspace.entity.typePublication
relation.isAuthorOfPublication2dc54d26-9b85-4f27-9696-71027b3c09a1
relation.isAuthorOfPublicationf2587cb3-725d-4333-90ba-d4aac12ec04c
relation.isAuthorOfPublicationb28d866e-85f4-4a0e-a91b-dc263c1aaa45
relation.isAuthorOfPublication08f9e67b-e7ba-420b-a651-37a03ba04f0c
relation.isAuthorOfPublication.latestForDiscoveryb28d866e-85f4-4a0e-a91b-dc263c1aaa45
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