Deposition of Au nanoparticles into mesoporous SiO2 SBA-15

Au/SiO2 SBA-15 materials were prepared using supercritical CO2 (scCO2) and by wet impregnation. First, SiO2 SBA-15 was functionalized with thiol groups at different grafting densities using 3-(Mercaptopropyl)trimethoxysilane dissolved in scCO2. The support was then impregnated with HAuCl4·3H2O in sc...

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Detalles Bibliográficos
Autores: Huerta, Andrea, Torralvo Fernández, María Josefa, Tenorio, María José, Pérez Velilla, Eduardo, Bermúdez, Jonathan, Calvo Garrido, María Lourdes, Cabañas Poveda, Albertina
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/96377
Acceso en línea:https://hdl.handle.net/20.500.14352/96377
Access Level:acceso abierto
Palabra clave:66.0
Ingeniería química
3303 Ingeniería y Tecnología Químicas
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spelling Deposition of Au nanoparticles into mesoporous SiO2 SBA-15Huerta, AndreaTorralvo Fernández, María JosefaTenorio, María JoséPérez Velilla, EduardoBermúdez, JonathanCalvo Garrido, María LourdesCabañas Poveda, Albertina66.0Ingeniería química3303 Ingeniería y Tecnología QuímicasAu/SiO2 SBA-15 materials were prepared using supercritical CO2 (scCO2) and by wet impregnation. First, SiO2 SBA-15 was functionalized with thiol groups at different grafting densities using 3-(Mercaptopropyl)trimethoxysilane dissolved in scCO2. The support was then impregnated with HAuCl4·3H2O in scCO2 modified with EtOH. Wet impregnation of the supports with HAuCl4·3H2O in ethanol was also performed. Materials were calcined at 500 °C to remove the organic matter and promote particle growth. Materials prepared on the highest thiol grafting density support showed Au NP between 2.5 and 5 nm homogeneously distributed within the mesopores. Slightly larger Au NPs were obtained in scCO2 modified with EtOH. Materials prepared on the low thiol grafting density support showed a bimodal particle size distribution with particles up to 7 nm located inside the mesopores and larger ones of 10–20 nm on the external surface. A possible reaction mechanism was proposed. These materials can be used in catalysis, sensing and biomedicine.ElsevierUniversidad Complutense de Madrid20222022-01-0120222022-01-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/96377reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/963772026-06-02T12:44:21Z
dc.title.none.fl_str_mv Deposition of Au nanoparticles into mesoporous SiO2 SBA-15
title Deposition of Au nanoparticles into mesoporous SiO2 SBA-15
spellingShingle Deposition of Au nanoparticles into mesoporous SiO2 SBA-15
Huerta, Andrea
66.0
Ingeniería química
3303 Ingeniería y Tecnología Químicas
title_short Deposition of Au nanoparticles into mesoporous SiO2 SBA-15
title_full Deposition of Au nanoparticles into mesoporous SiO2 SBA-15
title_fullStr Deposition of Au nanoparticles into mesoporous SiO2 SBA-15
title_full_unstemmed Deposition of Au nanoparticles into mesoporous SiO2 SBA-15
title_sort Deposition of Au nanoparticles into mesoporous SiO2 SBA-15
dc.creator.none.fl_str_mv Huerta, Andrea
Torralvo Fernández, María Josefa
Tenorio, María José
Pérez Velilla, Eduardo
Bermúdez, Jonathan
Calvo Garrido, María Lourdes
Cabañas Poveda, Albertina
author Huerta, Andrea
author_facet Huerta, Andrea
Torralvo Fernández, María Josefa
Tenorio, María José
Pérez Velilla, Eduardo
Bermúdez, Jonathan
Calvo Garrido, María Lourdes
Cabañas Poveda, Albertina
author_role author
author2 Torralvo Fernández, María Josefa
Tenorio, María José
Pérez Velilla, Eduardo
Bermúdez, Jonathan
Calvo Garrido, María Lourdes
Cabañas Poveda, Albertina
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 66.0
Ingeniería química
3303 Ingeniería y Tecnología Químicas
topic 66.0
Ingeniería química
3303 Ingeniería y Tecnología Químicas
description Au/SiO2 SBA-15 materials were prepared using supercritical CO2 (scCO2) and by wet impregnation. First, SiO2 SBA-15 was functionalized with thiol groups at different grafting densities using 3-(Mercaptopropyl)trimethoxysilane dissolved in scCO2. The support was then impregnated with HAuCl4·3H2O in scCO2 modified with EtOH. Wet impregnation of the supports with HAuCl4·3H2O in ethanol was also performed. Materials were calcined at 500 °C to remove the organic matter and promote particle growth. Materials prepared on the highest thiol grafting density support showed Au NP between 2.5 and 5 nm homogeneously distributed within the mesopores. Slightly larger Au NPs were obtained in scCO2 modified with EtOH. Materials prepared on the low thiol grafting density support showed a bimodal particle size distribution with particles up to 7 nm located inside the mesopores and larger ones of 10–20 nm on the external surface. A possible reaction mechanism was proposed. These materials can be used in catalysis, sensing and biomedicine.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-01-01
2022
2022-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/96377
url https://hdl.handle.net/20.500.14352/96377
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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