Metal oxide aerogels with controlled crystallinity and faceting from the epoxide-driven cross-linking of colloidal nanocrystals

We present a novel method to produce crystalline oxide aerogels which is based on the cross linking of preformed colloidal nanocrystals (NCs) triggered by propylene oxide (PO). Ceria and titania were used to illustrate this new approach. Ceria and titania colloidal NCs with tuned geometry and crysta...

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Autores: Berestok, Taisiia, Guardia, Pablo, Du, Ruifeng, Blanco Portals, Javier, Colombo, Massimo, Estradé Albiol, Sònia, Peiró Martínez, Francisca, Brock, Stephanie L., Cabot i Codina, Andreu
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/134878
Acesso em linha:https://hdl.handle.net/2445/134878
Access Level:acceso abierto
Palavra-chave:Nanocristalls
Lligands
Nanopartícules
Nanocrystals
Ligands
Nanoparticles
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spelling Metal oxide aerogels with controlled crystallinity and faceting from the epoxide-driven cross-linking of colloidal nanocrystalsBerestok, TaisiiaGuardia, PabloDu, RuifengBlanco Portals, JavierColombo, MassimoEstradé Albiol, SòniaPeiró Martínez, FranciscaBrock, Stephanie L.Cabot i Codina, AndreuNanocristallsLligandsNanopartículesNanocrystalsLigandsNanoparticlesWe present a novel method to produce crystalline oxide aerogels which is based on the cross linking of preformed colloidal nanocrystals (NCs) triggered by propylene oxide (PO). Ceria and titania were used to illustrate this new approach. Ceria and titania colloidal NCs with tuned geometry and crystal facets were produced in solution from the decomposition of a suitable salt in the presence of oleylamine (OAm). The native surface ligands were replaced by amino acids, rendering the NCs colloidally stable in polar solvents. The NC colloidal solution was then gelled by adding PO, which gradually stripped the ligands from the NC surface, triggering a slow NC aggregation. NC-based metal oxide aerogels displayed both high surface areas and excellent crystallinity associated with the crystalline nature of the constituent building blocks, even without any annealing step. Such NC-based metal oxide aerogels showed higher thermal stability compared with aerogels directly produced from ionic precursors using conventional sol-gel chemistry strategies.American Chemical Society2018info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/134878Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésVersió postprint del document publicat a: https://doi.org/10.1021/acsami.8b03754ACS Applied Materials & Interfaces, 2018, vol. 10, num. 18, p. 16041-16048https://doi.org/10.1021/acsami.8b03754info:eu-repo/grantAgreement/EC/H2020/712949info:eu-repo/grantAgreement/EC/FP7/600388(c) American Chemical Society , 2018info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1348782026-05-27T06:46:51Z
dc.title.none.fl_str_mv Metal oxide aerogels with controlled crystallinity and faceting from the epoxide-driven cross-linking of colloidal nanocrystals
title Metal oxide aerogels with controlled crystallinity and faceting from the epoxide-driven cross-linking of colloidal nanocrystals
spellingShingle Metal oxide aerogels with controlled crystallinity and faceting from the epoxide-driven cross-linking of colloidal nanocrystals
Berestok, Taisiia
Nanocristalls
Lligands
Nanopartícules
Nanocrystals
Ligands
Nanoparticles
title_short Metal oxide aerogels with controlled crystallinity and faceting from the epoxide-driven cross-linking of colloidal nanocrystals
title_full Metal oxide aerogels with controlled crystallinity and faceting from the epoxide-driven cross-linking of colloidal nanocrystals
title_fullStr Metal oxide aerogels with controlled crystallinity and faceting from the epoxide-driven cross-linking of colloidal nanocrystals
title_full_unstemmed Metal oxide aerogels with controlled crystallinity and faceting from the epoxide-driven cross-linking of colloidal nanocrystals
title_sort Metal oxide aerogels with controlled crystallinity and faceting from the epoxide-driven cross-linking of colloidal nanocrystals
dc.creator.none.fl_str_mv Berestok, Taisiia
Guardia, Pablo
Du, Ruifeng
Blanco Portals, Javier
Colombo, Massimo
Estradé Albiol, Sònia
Peiró Martínez, Francisca
Brock, Stephanie L.
Cabot i Codina, Andreu
author Berestok, Taisiia
author_facet Berestok, Taisiia
Guardia, Pablo
Du, Ruifeng
Blanco Portals, Javier
Colombo, Massimo
Estradé Albiol, Sònia
Peiró Martínez, Francisca
Brock, Stephanie L.
Cabot i Codina, Andreu
author_role author
author2 Guardia, Pablo
Du, Ruifeng
Blanco Portals, Javier
Colombo, Massimo
Estradé Albiol, Sònia
Peiró Martínez, Francisca
Brock, Stephanie L.
Cabot i Codina, Andreu
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Nanocristalls
Lligands
Nanopartícules
Nanocrystals
Ligands
Nanoparticles
topic Nanocristalls
Lligands
Nanopartícules
Nanocrystals
Ligands
Nanoparticles
description We present a novel method to produce crystalline oxide aerogels which is based on the cross linking of preformed colloidal nanocrystals (NCs) triggered by propylene oxide (PO). Ceria and titania were used to illustrate this new approach. Ceria and titania colloidal NCs with tuned geometry and crystal facets were produced in solution from the decomposition of a suitable salt in the presence of oleylamine (OAm). The native surface ligands were replaced by amino acids, rendering the NCs colloidally stable in polar solvents. The NC colloidal solution was then gelled by adding PO, which gradually stripped the ligands from the NC surface, triggering a slow NC aggregation. NC-based metal oxide aerogels displayed both high surface areas and excellent crystallinity associated with the crystalline nature of the constituent building blocks, even without any annealing step. Such NC-based metal oxide aerogels showed higher thermal stability compared with aerogels directly produced from ionic precursors using conventional sol-gel chemistry strategies.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/134878
url https://hdl.handle.net/2445/134878
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1021/acsami.8b03754
ACS Applied Materials & Interfaces, 2018, vol. 10, num. 18, p. 16041-16048
https://doi.org/10.1021/acsami.8b03754
info:eu-repo/grantAgreement/EC/H2020/712949
info:eu-repo/grantAgreement/EC/FP7/600388
dc.rights.none.fl_str_mv (c) American Chemical Society , 2018
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Chemical Society , 2018
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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