Synthesis and characterization of the Fe3O4@SiO2 nanoparticles

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dc.contributor.authorTessarolli, Barbara Oliveira [UNESP]
dc.contributor.authorDa Silva, Paulo Vitor [UNESP]
dc.contributor.authorGallardo, Emílio Carlos [UNESP]
dc.contributor.authorMagdalena, Aroldo Geraldo [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2020-12-12T01:06:29Z
dc.date.available2020-12-12T01:06:29Z
dc.date.issued2019-01-01
dc.description.abstractIn this work the synthesis and characterization of the magnetic nanoparticles of magnetite (Fe3O4) from the methodology via co-precipitation and its subsequent functionalization by silica (SiO2), carried out via sol-gel methodology were studied. The characterization of the nanoparticles was performed by X-ray diffractometry (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and zeta potential variation as a function of pH. The results showed that the synthesis of the Fe3O4 and Fe3O4@SiO2 nanoparticles was successful, with a high homogeneity of shape and size, according to the results of the analysis of the images obtained by MET, including the formation of shell structures for the Fe3O4@SiO2 nanoparticles. The functionalization of the magnetite surface was confirmed by the FTIR data and the zeta potential measurements. Surface functionalization by silica causes an increase in nanoparticle size due to the introduction of an inorganic shell around magnetite nanoparticles. The zeta potential curves showed that with the addition of silica, the colloidal stability increases in relation to the magnetite and this increase is related to the functionalized silica that should be minimizing the surface energies around the magnetic nanoparticles.en
dc.description.affiliationUniversidade Estadual Paulista UNESP Departamento de Química da Faculdade de Ciências
dc.description.affiliationUnespUniversidade Estadual Paulista UNESP Departamento de Química da Faculdade de Ciências
dc.identifierhttp://dx.doi.org/10.1590/s1517-707620190004.0831
dc.identifier.citationRevista Materia, v. 24, n. 4, 2019.
dc.identifier.doi10.1590/s1517-707620190004.0831
dc.identifier.fileS1517-70762019000400326.pdf
dc.identifier.issn1517-7076
dc.identifier.scieloS1517-70762019000400326
dc.identifier.scopus2-s2.0-85075684901
dc.identifier.urihttp://hdl.handle.net/11449/198206
dc.language.isopor
dc.relation.ispartofRevista Materia
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectCore-shell structure
dc.subjectFunctionalization
dc.subjectMagnetite
dc.subjectSilica
dc.titleSynthesis and characterization of the Fe3O4@SiO2 nanoparticlesen
dc.titleSíntese e caracterização de nanopartículas de Fe3O4@SiO2pt
dc.typeArtigo
unesp.author.orcid0000-0002-4036-6520[1]
unesp.author.orcid0000-0002-2127-8226[2]
unesp.author.orcid0000-0002-8067-5301[3]
unesp.author.orcid0000-0003-3385-2106[4]

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