Controlling the morphology and pore size of mesostructured silica nanoparticles: the role of iron oxidation state

Autores
Coelho, Jakelyne Viana; Guedes, Marina Silva; Barrera Diaz, Deicy Amparo; Sapag, Manuel Karim; Pereira, Márcio César; de Oliveira, Luiz Carlos Alves
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We demonstrate morphology and pore size dependence of silica nanoparticles (SNPs) synthesized via control of the iron oxidation state. In the absence of any Fe species, only spherical SNPs are produced, whereas in the presence of Fe3+ and Fe2+ ions, SNPs with rod-like and nanosheet morphologies, 10 respectively, are formed. The average pore size increase from 1.7 nm in the absence of iron to 3.2 and 5.9 nm as Fe3+ and Fe2+, respectively, were used during the synthesis. Both samples of SNPs synthesized in the presence of Fe2+ and Fe3+ have 0.2 wt.% of tetrahedral iron in the silica framework, whereas most of the iron is in the silica extraframework, as verified by Mössbauer spectroscopy, UV-vis diffuse reflectance, FTIR, XRD data and TPR analysis. These Fe2+ and Fe3+ cations play a fundamental role to 15 control these properties because they change the curvature and the surface charge density of CTAB micelles, thus favoring the spherical to rod-like transition. The rod-like shape was retained in Fe3+- containing sample, whereas a nanosheet-like morphology was produced in Fe2+-containing sample due to the breakage of silica walls during the thermal treatment to remove the template. The control of the textural properties is interesting to allow the fabrication of selective photocatalysts for oxidation of 20 different organic substrates.
Fil: Coelho, Jakelyne Viana. Universidade Federal Do Minas Gerais; Brasil
Fil: Guedes, Marina Silva. Universidade Federal Do Minas Gerais; Brasil
Fil: Barrera Diaz, Deicy Amparo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; Argentina
Fil: Sapag, Manuel Karim. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; Argentina
Fil: Pereira, Márcio César. Universidade Federal dos Vales do Jequitinhonha e Mucuri. Instituto de Ciência, Engenharia e Tecnologia ; Brasil
Fil: de Oliveira, Luiz Carlos Alves. Universidade Federal Do Minas Gerais; Brasil
Materia
Mcm 41
Mossbauer
Iron Oxide
Rtp
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/5703
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/5703
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Controlling the morphology and pore size of mesostructured silica nanoparticles: the role of iron oxidation stateCoelho, Jakelyne VianaGuedes, Marina SilvaBarrera Diaz, Deicy AmparoSapag, Manuel KarimPereira, Márcio Césarde Oliveira, Luiz Carlos AlvesMcm 41MossbauerIron OxideRtphttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2We demonstrate morphology and pore size dependence of silica nanoparticles (SNPs) synthesized via control of the iron oxidation state. In the absence of any Fe species, only spherical SNPs are produced, whereas in the presence of Fe3+ and Fe2+ ions, SNPs with rod-like and nanosheet morphologies, 10 respectively, are formed. The average pore size increase from 1.7 nm in the absence of iron to 3.2 and 5.9 nm as Fe3+ and Fe2+, respectively, were used during the synthesis. Both samples of SNPs synthesized in the presence of Fe2+ and Fe3+ have 0.2 wt.% of tetrahedral iron in the silica framework, whereas most of the iron is in the silica extraframework, as verified by Mössbauer spectroscopy, UV-vis diffuse reflectance, FTIR, XRD data and TPR analysis. These Fe2+ and Fe3+ cations play a fundamental role to 15 control these properties because they change the curvature and the surface charge density of CTAB micelles, thus favoring the spherical to rod-like transition. The rod-like shape was retained in Fe3+- containing sample, whereas a nanosheet-like morphology was produced in Fe2+-containing sample due to the breakage of silica walls during the thermal treatment to remove the template. The control of the textural properties is interesting to allow the fabrication of selective photocatalysts for oxidation of 20 different organic substrates.Fil: Coelho, Jakelyne Viana. Universidade Federal Do Minas Gerais; BrasilFil: Guedes, Marina Silva. Universidade Federal Do Minas Gerais; BrasilFil: Barrera Diaz, Deicy Amparo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; ArgentinaFil: Sapag, Manuel Karim. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; ArgentinaFil: Pereira, Márcio César. Universidade Federal dos Vales do Jequitinhonha e Mucuri. Instituto de Ciência, Engenharia e Tecnologia ; BrasilFil: de Oliveira, Luiz Carlos Alves. Universidade Federal Do Minas Gerais; BrasilRoyal Society of Chemistry2013-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/5703Coelho, Jakelyne Viana; Guedes, Marina Silva; Barrera Diaz, Deicy Amparo; Sapag, Manuel Karim; Pereira, Márcio César; et al.; Controlling the morphology and pore size of mesostructured silica nanoparticles: the role of iron oxidation state; Royal Society of Chemistry; Dalton Transactions; 42; 31; 8-2013; 11271-112801477-9226enginfo:eu-repo/semantics/altIdentifier/url/http://pubs.rsc.org/en/Content/ArticleLanding/2013/DT/C3DT50794Ginfo:eu-repo/semantics/altIdentifier/doi/10.1039/C3DT50794Ginfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:02:13Zoai:ri.conicet.gov.ar:11336/5703instacron: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 10:02:13.465CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Controlling the morphology and pore size of mesostructured silica nanoparticles: the role of iron oxidation state
title Controlling the morphology and pore size of mesostructured silica nanoparticles: the role of iron oxidation state
spellingShingle Controlling the morphology and pore size of mesostructured silica nanoparticles: the role of iron oxidation state
Coelho, Jakelyne Viana
Mcm 41
Mossbauer
Iron Oxide
Rtp
title_short Controlling the morphology and pore size of mesostructured silica nanoparticles: the role of iron oxidation state
title_full Controlling the morphology and pore size of mesostructured silica nanoparticles: the role of iron oxidation state
title_fullStr Controlling the morphology and pore size of mesostructured silica nanoparticles: the role of iron oxidation state
title_full_unstemmed Controlling the morphology and pore size of mesostructured silica nanoparticles: the role of iron oxidation state
title_sort Controlling the morphology and pore size of mesostructured silica nanoparticles: the role of iron oxidation state
dc.creator.none.fl_str_mv Coelho, Jakelyne Viana
Guedes, Marina Silva
Barrera Diaz, Deicy Amparo
Sapag, Manuel Karim
Pereira, Márcio César
de Oliveira, Luiz Carlos Alves
author Coelho, Jakelyne Viana
author_facet Coelho, Jakelyne Viana
Guedes, Marina Silva
Barrera Diaz, Deicy Amparo
Sapag, Manuel Karim
Pereira, Márcio César
de Oliveira, Luiz Carlos Alves
author_role author
author2 Guedes, Marina Silva
Barrera Diaz, Deicy Amparo
Sapag, Manuel Karim
Pereira, Márcio César
de Oliveira, Luiz Carlos Alves
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Mcm 41
Mossbauer
Iron Oxide
Rtp
topic Mcm 41
Mossbauer
Iron Oxide
Rtp
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv We demonstrate morphology and pore size dependence of silica nanoparticles (SNPs) synthesized via control of the iron oxidation state. In the absence of any Fe species, only spherical SNPs are produced, whereas in the presence of Fe3+ and Fe2+ ions, SNPs with rod-like and nanosheet morphologies, 10 respectively, are formed. The average pore size increase from 1.7 nm in the absence of iron to 3.2 and 5.9 nm as Fe3+ and Fe2+, respectively, were used during the synthesis. Both samples of SNPs synthesized in the presence of Fe2+ and Fe3+ have 0.2 wt.% of tetrahedral iron in the silica framework, whereas most of the iron is in the silica extraframework, as verified by Mössbauer spectroscopy, UV-vis diffuse reflectance, FTIR, XRD data and TPR analysis. These Fe2+ and Fe3+ cations play a fundamental role to 15 control these properties because they change the curvature and the surface charge density of CTAB micelles, thus favoring the spherical to rod-like transition. The rod-like shape was retained in Fe3+- containing sample, whereas a nanosheet-like morphology was produced in Fe2+-containing sample due to the breakage of silica walls during the thermal treatment to remove the template. The control of the textural properties is interesting to allow the fabrication of selective photocatalysts for oxidation of 20 different organic substrates.
Fil: Coelho, Jakelyne Viana. Universidade Federal Do Minas Gerais; Brasil
Fil: Guedes, Marina Silva. Universidade Federal Do Minas Gerais; Brasil
Fil: Barrera Diaz, Deicy Amparo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; Argentina
Fil: Sapag, Manuel Karim. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; Argentina
Fil: Pereira, Márcio César. Universidade Federal dos Vales do Jequitinhonha e Mucuri. Instituto de Ciência, Engenharia e Tecnologia ; Brasil
Fil: de Oliveira, Luiz Carlos Alves. Universidade Federal Do Minas Gerais; Brasil
description We demonstrate morphology and pore size dependence of silica nanoparticles (SNPs) synthesized via control of the iron oxidation state. In the absence of any Fe species, only spherical SNPs are produced, whereas in the presence of Fe3+ and Fe2+ ions, SNPs with rod-like and nanosheet morphologies, 10 respectively, are formed. The average pore size increase from 1.7 nm in the absence of iron to 3.2 and 5.9 nm as Fe3+ and Fe2+, respectively, were used during the synthesis. Both samples of SNPs synthesized in the presence of Fe2+ and Fe3+ have 0.2 wt.% of tetrahedral iron in the silica framework, whereas most of the iron is in the silica extraframework, as verified by Mössbauer spectroscopy, UV-vis diffuse reflectance, FTIR, XRD data and TPR analysis. These Fe2+ and Fe3+ cations play a fundamental role to 15 control these properties because they change the curvature and the surface charge density of CTAB micelles, thus favoring the spherical to rod-like transition. The rod-like shape was retained in Fe3+- containing sample, whereas a nanosheet-like morphology was produced in Fe2+-containing sample due to the breakage of silica walls during the thermal treatment to remove the template. The control of the textural properties is interesting to allow the fabrication of selective photocatalysts for oxidation of 20 different organic substrates.
publishDate 2013
dc.date.none.fl_str_mv 2013-08
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/11336/5703
Coelho, Jakelyne Viana; Guedes, Marina Silva; Barrera Diaz, Deicy Amparo; Sapag, Manuel Karim; Pereira, Márcio César; et al.; Controlling the morphology and pore size of mesostructured silica nanoparticles: the role of iron oxidation state; Royal Society of Chemistry; Dalton Transactions; 42; 31; 8-2013; 11271-11280
1477-9226
url http://hdl.handle.net/11336/5703
identifier_str_mv Coelho, Jakelyne Viana; Guedes, Marina Silva; Barrera Diaz, Deicy Amparo; Sapag, Manuel Karim; Pereira, Márcio César; et al.; Controlling the morphology and pore size of mesostructured silica nanoparticles: the role of iron oxidation state; Royal Society of Chemistry; Dalton Transactions; 42; 31; 8-2013; 11271-11280
1477-9226
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://pubs.rsc.org/en/Content/ArticleLanding/2013/DT/C3DT50794G
info:eu-repo/semantics/altIdentifier/doi/10.1039/C3DT50794G
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Royal Society of Chemistry
publisher.none.fl_str_mv Royal Society of Chemistry
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_ 1842269744768483328
score 13.13397

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