Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41

Autores
Fellenz, Nicolás Antonio; Perez de Berti, Ignacio Omar; Soldati, Analía Leticia; Stewart, Silvana Jacqueline; Marchetti, Sergio Gustavo; Bengoa, Jose Fernando
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This work reports a simple synthesis of a mesoporous ordered silica structure (MCM-41) grown up around pre-synthesized maghemite nanoparticles. A composite with magnetic response and high specific surface area was obtained adding maghemite nanoparticles coated with oleic acid in the synthesis gel of MCM-41 and finally calcining in air. Different characterizations techniques such as magnetic measurements, Mössbauer spectroscopy at 25 and -260 °C and transmission electron microscopy were used to study the magnetic and structural changes of the initial maghemite nanoparticles produced during its coverage with the mesoporous silica structure. The presence of the mesoporous structure inhibits the expected transformation from maghemite to hematite when the system was calcined in air at 510 °C. It was established that a sintering of the nanoparticles during the calcination step occurs, leading to a magnetization saturation value similar to that of the bulk compound. In order to evaluate the capability as adsorbent, the magnetic composite was subjected to a surface amino-functionalization and then tested for Cr(VI) and Cu(II) adsorption from water.
Fil: Fellenz, Nicolás Antonio. Universidad Nacional de Rio Negro; Argentina
Fil: Perez de Berti, Ignacio Omar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Soldati, Analía Leticia. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina
Fil: Stewart, Silvana Jacqueline. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Física La Plata; Argentina
Fil: Marchetti, Sergio Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Bengoa, Jose Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Materia
Sintering
Sol-gel-processes
Nanocomposites
Magnetic properties
SiO2
Nivel de accesibilidad
acceso embargado
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/5724
Acceder
id CONICETDig_5bfbaaa9a868a26be18a3fd603a0ee8d
oai_identifier_str oai:ri.conicet.gov.ar:11336/5724
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41Fellenz, Nicolás AntonioPerez de Berti, Ignacio OmarSoldati, Analía LeticiaStewart, Silvana JacquelineMarchetti, Sergio GustavoBengoa, Jose FernandoSinteringSol-gel-processesNanocompositesMagnetic propertiesSiO2https://purl.org/becyt/ford/2.10https://purl.org/becyt/ford/2This work reports a simple synthesis of a mesoporous ordered silica structure (MCM-41) grown up around pre-synthesized maghemite nanoparticles. A composite with magnetic response and high specific surface area was obtained adding maghemite nanoparticles coated with oleic acid in the synthesis gel of MCM-41 and finally calcining in air. Different characterizations techniques such as magnetic measurements, Mössbauer spectroscopy at 25 and -260 °C and transmission electron microscopy were used to study the magnetic and structural changes of the initial maghemite nanoparticles produced during its coverage with the mesoporous silica structure. The presence of the mesoporous structure inhibits the expected transformation from maghemite to hematite when the system was calcined in air at 510 °C. It was established that a sintering of the nanoparticles during the calcination step occurs, leading to a magnetization saturation value similar to that of the bulk compound. In order to evaluate the capability as adsorbent, the magnetic composite was subjected to a surface amino-functionalization and then tested for Cr(VI) and Cu(II) adsorption from water.Fil: Fellenz, Nicolás Antonio. Universidad Nacional de Rio Negro; ArgentinaFil: Perez de Berti, Ignacio Omar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaFil: Soldati, Analía Leticia. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); ArgentinaFil: Stewart, Silvana Jacqueline. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Física La Plata; ArgentinaFil: Marchetti, Sergio Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaFil: Bengoa, Jose Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaElsevier2015-08-11info:eu-repo/date/embargoEnd/2017-08-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/5724Fellenz, Nicolás Antonio; Perez de Berti, Ignacio Omar; Soldati, Analía Leticia; Stewart, Silvana Jacqueline; Marchetti, Sergio Gustavo; et al.; Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41; Elsevier; Ceramics International; 41; 10B; 11-8-2015; 15057-150660272-8842enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.ceramint.2015.08.016info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0272884215015412info:eu-repo/semantics/embargoedAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:02:40Zoai:ri.conicet.gov.ar:11336/5724instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:02:40.937CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41
title Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41
spellingShingle Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41
Fellenz, Nicolás Antonio
Sintering
Sol-gel-processes
Nanocomposites
Magnetic properties
SiO2
title_short Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41
title_full Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41
title_fullStr Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41
title_full_unstemmed Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41
title_sort Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41
dc.creator.none.fl_str_mv Fellenz, Nicolás Antonio
Perez de Berti, Ignacio Omar
Soldati, Analía Leticia
Stewart, Silvana Jacqueline
Marchetti, Sergio Gustavo
Bengoa, Jose Fernando
author Fellenz, Nicolás Antonio
author_facet Fellenz, Nicolás Antonio
Perez de Berti, Ignacio Omar
Soldati, Analía Leticia
Stewart, Silvana Jacqueline
Marchetti, Sergio Gustavo
Bengoa, Jose Fernando
author_role author
author2 Perez de Berti, Ignacio Omar
Soldati, Analía Leticia
Stewart, Silvana Jacqueline
Marchetti, Sergio Gustavo
Bengoa, Jose Fernando
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Sintering
Sol-gel-processes
Nanocomposites
Magnetic properties
SiO2
topic Sintering
Sol-gel-processes
Nanocomposites
Magnetic properties
SiO2
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.10
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv This work reports a simple synthesis of a mesoporous ordered silica structure (MCM-41) grown up around pre-synthesized maghemite nanoparticles. A composite with magnetic response and high specific surface area was obtained adding maghemite nanoparticles coated with oleic acid in the synthesis gel of MCM-41 and finally calcining in air. Different characterizations techniques such as magnetic measurements, Mössbauer spectroscopy at 25 and -260 °C and transmission electron microscopy were used to study the magnetic and structural changes of the initial maghemite nanoparticles produced during its coverage with the mesoporous silica structure. The presence of the mesoporous structure inhibits the expected transformation from maghemite to hematite when the system was calcined in air at 510 °C. It was established that a sintering of the nanoparticles during the calcination step occurs, leading to a magnetization saturation value similar to that of the bulk compound. In order to evaluate the capability as adsorbent, the magnetic composite was subjected to a surface amino-functionalization and then tested for Cr(VI) and Cu(II) adsorption from water.
Fil: Fellenz, Nicolás Antonio. Universidad Nacional de Rio Negro; Argentina
Fil: Perez de Berti, Ignacio Omar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Soldati, Analía Leticia. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina
Fil: Stewart, Silvana Jacqueline. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Física La Plata; Argentina
Fil: Marchetti, Sergio Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Bengoa, Jose Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
description This work reports a simple synthesis of a mesoporous ordered silica structure (MCM-41) grown up around pre-synthesized maghemite nanoparticles. A composite with magnetic response and high specific surface area was obtained adding maghemite nanoparticles coated with oleic acid in the synthesis gel of MCM-41 and finally calcining in air. Different characterizations techniques such as magnetic measurements, Mössbauer spectroscopy at 25 and -260 °C and transmission electron microscopy were used to study the magnetic and structural changes of the initial maghemite nanoparticles produced during its coverage with the mesoporous silica structure. The presence of the mesoporous structure inhibits the expected transformation from maghemite to hematite when the system was calcined in air at 510 °C. It was established that a sintering of the nanoparticles during the calcination step occurs, leading to a magnetization saturation value similar to that of the bulk compound. In order to evaluate the capability as adsorbent, the magnetic composite was subjected to a surface amino-functionalization and then tested for Cr(VI) and Cu(II) adsorption from water.
publishDate 2015
dc.date.none.fl_str_mv 2015-08-11
info:eu-repo/date/embargoEnd/2017-08-31
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/5724
Fellenz, Nicolás Antonio; Perez de Berti, Ignacio Omar; Soldati, Analía Leticia; Stewart, Silvana Jacqueline; Marchetti, Sergio Gustavo; et al.; Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41; Elsevier; Ceramics International; 41; 10B; 11-8-2015; 15057-15066
0272-8842
url http://hdl.handle.net/11336/5724
identifier_str_mv Fellenz, Nicolás Antonio; Perez de Berti, Ignacio Omar; Soldati, Analía Leticia; Stewart, Silvana Jacqueline; Marchetti, Sergio Gustavo; et al.; Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41; Elsevier; Ceramics International; 41; 10B; 11-8-2015; 15057-15066
0272-8842
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ceramint.2015.08.016
info:eu-repo/semantics/altIdentifier/doi/
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0272884215015412
dc.rights.none.fl_str_mv info:eu-repo/semantics/embargoedAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv embargoedAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842269769144729600
score 13.13397

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