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

Autores
Fellenz, Nicolás A.; Perez de Berti, Ignacio O.; Soldati, Analía L.; Stewart, Silvana J.; Marchetti, Sergio G.; Bengoa, Jose F.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Fil: Fellenz, Nicolás A. Universidad Nacional de Río Negro; Argentina
Fil: Perez de Berti, Ignacio O. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Perez de Berti, Ignacio O. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Soldati, Analía L. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina
Fil: Stewart, Silvana J. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Stewart, Silvana J. Centro Científico Tecnológico La Plata. Instituto de Física La Plata; Argentina
Fil: Marchetti, Sergio G. Consejo Nacional de Investigaciones Científicas y Técnicas.
Fil: Marchetti, Sergio G. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Bengoa, Jose F. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Bengoa, Jose F. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
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.
Materia
Nanomateriales
A. Sintering
A. Sol–gel processes
B. Nanocomposites
C. Magnetic Propieties
SiO
Nanomateriales
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
RID-UNRN (UNRN)
Institución
Universidad Nacional de Río Negro
OAI Identificador
oai:rid.unrn.edu.ar:20.500.12049/2637
Acceder
id RIDUNRN_5ecfbafd9bf71fedb2216a8e34d06421
oai_identifier_str oai:rid.unrn.edu.ar:20.500.12049/2637
network_acronym_str RIDUNRN
repository_id_str 4369
network_name_str RID-UNRN (UNRN)
spelling Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41Fellenz, Nicolás A.Perez de Berti, Ignacio O.Soldati, Analía L.Stewart, Silvana J.Marchetti, Sergio G.Bengoa, Jose F.NanomaterialesA. SinteringA. Sol–gel processesB. NanocompositesC. Magnetic PropietiesSiONanomaterialesFil: Fellenz, Nicolás A. Universidad Nacional de Río Negro; ArgentinaFil: Perez de Berti, Ignacio O. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Perez de Berti, Ignacio O. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaFil: Soldati, Analía L. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); ArgentinaFil: Stewart, Silvana J. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Stewart, Silvana J. Centro Científico Tecnológico La Plata. Instituto de Física La Plata; ArgentinaFil: Marchetti, Sergio G. Consejo Nacional de Investigaciones Científicas y Técnicas.Fil: Marchetti, Sergio G. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaFil: Bengoa, Jose F. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Bengoa, Jose F. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaThis 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.2015-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfFellenz, Nicolás A., Perez de Berti, Ignacio O., Soldati, Analía L., Stewart, Silvana J., Marchetti, Sergio G., et al. (2015). Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41. Elsevier; Ceramics International; 41; 10B; pp. 15057-150660272-8842http://www.sciencedirect.com/science/article/pii/S0272884215015412http://hdl.handle.net/11336/5724https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2637http://dx.doi.org/10.1016/j.ceramint.2015.08.016eng41Ceramics Internationalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/4.0/reponame:RID-UNRN (UNRN)instname:Universidad Nacional de Río Negro2025-09-04T11:13:31Zoai:rid.unrn.edu.ar:20.500.12049/2637instacron:UNRNInstitucionalhttps://rid.unrn.edu.ar/jspui/Universidad públicaNo correspondehttps://rid.unrn.edu.ar/oai/snrdrid@unrn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:43692025-09-04 11:13:32.207RID-UNRN (UNRN) - Universidad Nacional de Río Negrofalse
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 A.
Nanomateriales
A. Sintering
A. Sol–gel processes
B. Nanocomposites
C. Magnetic Propieties
SiO
Nanomateriales
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 A.
Perez de Berti, Ignacio O.
Soldati, Analía L.
Stewart, Silvana J.
Marchetti, Sergio G.
Bengoa, Jose F.
author Fellenz, Nicolás A.
author_facet Fellenz, Nicolás A.
Perez de Berti, Ignacio O.
Soldati, Analía L.
Stewart, Silvana J.
Marchetti, Sergio G.
Bengoa, Jose F.
author_role author
author2 Perez de Berti, Ignacio O.
Soldati, Analía L.
Stewart, Silvana J.
Marchetti, Sergio G.
Bengoa, Jose F.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Nanomateriales
A. Sintering
A. Sol–gel processes
B. Nanocomposites
C. Magnetic Propieties
SiO
Nanomateriales
topic Nanomateriales
A. Sintering
A. Sol–gel processes
B. Nanocomposites
C. Magnetic Propieties
SiO
Nanomateriales
dc.description.none.fl_txt_mv Fil: Fellenz, Nicolás A. Universidad Nacional de Río Negro; Argentina
Fil: Perez de Berti, Ignacio O. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Perez de Berti, Ignacio O. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Soldati, Analía L. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina
Fil: Stewart, Silvana J. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Stewart, Silvana J. Centro Científico Tecnológico La Plata. Instituto de Física La Plata; Argentina
Fil: Marchetti, Sergio G. Consejo Nacional de Investigaciones Científicas y Técnicas.
Fil: Marchetti, Sergio G. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Bengoa, Jose F. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Bengoa, Jose F. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
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.
description Fil: Fellenz, Nicolás A. Universidad Nacional de Río Negro; Argentina
publishDate 2015
dc.date.none.fl_str_mv 2015-12
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 Fellenz, Nicolás A., Perez de Berti, Ignacio O., Soldati, Analía L., Stewart, Silvana J., Marchetti, Sergio G., et al. (2015). Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41. Elsevier; Ceramics International; 41; 10B; pp. 15057-15066
0272-8842
http://www.sciencedirect.com/science/article/pii/S0272884215015412
http://hdl.handle.net/11336/5724
https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2637
http://dx.doi.org/10.1016/j.ceramint.2015.08.016
identifier_str_mv Fellenz, Nicolás A., Perez de Berti, Ignacio O., Soldati, Analía L., Stewart, Silvana J., Marchetti, Sergio G., et al. (2015). Changes on structural and magnetic properties of maghemite nanoparticles during their coverage with MCM-41. Elsevier; Ceramics International; 41; 10B; pp. 15057-15066
0272-8842
url http://www.sciencedirect.com/science/article/pii/S0272884215015412
http://hdl.handle.net/11336/5724
https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2637
http://dx.doi.org/10.1016/j.ceramint.2015.08.016
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 41
Ceramics International
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/4.0/
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:RID-UNRN (UNRN)
instname:Universidad Nacional de Río Negro
reponame_str RID-UNRN (UNRN)
collection RID-UNRN (UNRN)
instname_str Universidad Nacional de Río Negro
repository.name.fl_str_mv RID-UNRN (UNRN) - Universidad Nacional de Río Negro
repository.mail.fl_str_mv rid@unrn.edu.ar
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score 12.623145

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