Synthesis and characterization of the Fe3O4@SiO2 nanoparticles

Detalhes bibliográficos
Autor(a) principal: Tessarolli, Barbara Oliveira [UNESP]
Data de Publicação: 2019
Outros Autores: Da Silva, Paulo Vitor [UNESP], Gallardo, Emílio Carlos [UNESP], Magdalena, Aroldo Geraldo [UNESP]
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1590/s1517-707620190004.0831
http://hdl.handle.net/11449/198206
Resumo: In 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.
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spelling Synthesis and characterization of the Fe3O4@SiO2 nanoparticlesSíntese e caracterização de nanopartículas de Fe3O4@SiO2Core-shell structureFunctionalizationMagnetiteSilicaIn 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.Universidade Estadual Paulista UNESP Departamento de Química da Faculdade de CiênciasUniversidade Estadual Paulista UNESP Departamento de Química da Faculdade de CiênciasUniversidade Estadual Paulista (Unesp)Tessarolli, Barbara Oliveira [UNESP]Da Silva, Paulo Vitor [UNESP]Gallardo, Emílio Carlos [UNESP]Magdalena, Aroldo Geraldo [UNESP]2020-12-12T01:06:29Z2020-12-12T01:06:29Z2019-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1590/s1517-707620190004.0831Revista Materia, v. 24, n. 4, 2019.1517-7076http://hdl.handle.net/11449/19820610.1590/s1517-707620190004.0831S1517-707620190004003262-s2.0-85075684901S1517-70762019000400326.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporRevista Materiainfo:eu-repo/semantics/openAccess2023-10-31T06:13:27Zoai:repositorio.unesp.br:11449/198206Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:33:59.908791Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Synthesis and characterization of the Fe3O4@SiO2 nanoparticles
Síntese e caracterização de nanopartículas de Fe3O4@SiO2
title Synthesis and characterization of the Fe3O4@SiO2 nanoparticles
spellingShingle Synthesis and characterization of the Fe3O4@SiO2 nanoparticles
Tessarolli, Barbara Oliveira [UNESP]
Core-shell structure
Functionalization
Magnetite
Silica
title_short Synthesis and characterization of the Fe3O4@SiO2 nanoparticles
title_full Synthesis and characterization of the Fe3O4@SiO2 nanoparticles
title_fullStr Synthesis and characterization of the Fe3O4@SiO2 nanoparticles
title_full_unstemmed Synthesis and characterization of the Fe3O4@SiO2 nanoparticles
title_sort Synthesis and characterization of the Fe3O4@SiO2 nanoparticles
author Tessarolli, Barbara Oliveira [UNESP]
author_facet Tessarolli, Barbara Oliveira [UNESP]
Da Silva, Paulo Vitor [UNESP]
Gallardo, Emílio Carlos [UNESP]
Magdalena, Aroldo Geraldo [UNESP]
author_role author
author2 Da Silva, Paulo Vitor [UNESP]
Gallardo, Emílio Carlos [UNESP]
Magdalena, Aroldo Geraldo [UNESP]
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Tessarolli, Barbara Oliveira [UNESP]
Da Silva, Paulo Vitor [UNESP]
Gallardo, Emílio Carlos [UNESP]
Magdalena, Aroldo Geraldo [UNESP]
dc.subject.por.fl_str_mv Core-shell structure
Functionalization
Magnetite
Silica
topic Core-shell structure
Functionalization
Magnetite
Silica
description In 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.
publishDate 2019
dc.date.none.fl_str_mv 2019-01-01
2020-12-12T01:06:29Z
2020-12-12T01:06:29Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1590/s1517-707620190004.0831
Revista Materia, v. 24, n. 4, 2019.
1517-7076
http://hdl.handle.net/11449/198206
10.1590/s1517-707620190004.0831
S1517-70762019000400326
2-s2.0-85075684901
S1517-70762019000400326.pdf
url http://dx.doi.org/10.1590/s1517-707620190004.0831
http://hdl.handle.net/11449/198206
identifier_str_mv Revista Materia, v. 24, n. 4, 2019.
1517-7076
10.1590/s1517-707620190004.0831
S1517-70762019000400326
2-s2.0-85075684901
S1517-70762019000400326.pdf
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv Revista Materia
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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