A visual validation of the combined effect of pH and dilution on the porosity of carbon xerogels

The hypothesis about the formation of the porous structure of carbon xerogels when the pH and the dilution ratio of the precursor solution are simultaneously modified has been validated by means of scanning electron microscope analysis. The morphology of the carbon xerogels showed that the size and...

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Detalhes bibliográficos
Autores: Rey Raap, Natalia, Arenillas de la Puente, Ana, Menéndez Díaz, José Ángel
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2015
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/132917
Acesso em linha:http://hdl.handle.net/10261/132917
Access Level:acceso abierto
Palavra-chave:Carbon xerogels
Microwave heating
Tailored porosity
Scanning electron microscope
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spelling A visual validation of the combined effect of pH and dilution on the porosity of carbon xerogelsRey Raap, NataliaArenillas de la Puente, AnaMenéndez Díaz, José ÁngelCarbon xerogelsMicrowave heatingTailored porosityScanning electron microscopeThe hypothesis about the formation of the porous structure of carbon xerogels when the pH and the dilution ratio of the precursor solution are simultaneously modified has been validated by means of scanning electron microscope analysis. The morphology of the carbon xerogels showed that the size and number of the clusters produced during the sol–gel reaction is not only influenced by the pH but also by the dilution ratio. As with a decrease in the pH value, an increase in the dilution ratio caused the formation of a small number of large clusters, leading to materials with large pores. However, depending on the values selected the effect of the pH and dilution ratio was enhanced or diminished by the effect of the other. Hence, an appropriate adjustment of these two variables allowed microporous, micro-mesoporous and micro-macroporous materials to be obtained with pore volumes that could not be achieved by modifying the pH or the dilution ratio separately.Financial support from the Ministerio de Economía y Competitividad of Spain MINECO (under Projects MAT2011-23733 and IPT-2012-0689-420000, (BES-2012-052676)) is greatly acknowledged. NRR is also grateful to MINECO for her predoctoral research grant.Peer reviewedElsevierMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201620162015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/132917reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.micromeso.2015.10.044Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1329172026-05-22T06:33:51Z
dc.title.none.fl_str_mv A visual validation of the combined effect of pH and dilution on the porosity of carbon xerogels
title A visual validation of the combined effect of pH and dilution on the porosity of carbon xerogels
spellingShingle A visual validation of the combined effect of pH and dilution on the porosity of carbon xerogels
Rey Raap, Natalia
Carbon xerogels
Microwave heating
Tailored porosity
Scanning electron microscope
title_short A visual validation of the combined effect of pH and dilution on the porosity of carbon xerogels
title_full A visual validation of the combined effect of pH and dilution on the porosity of carbon xerogels
title_fullStr A visual validation of the combined effect of pH and dilution on the porosity of carbon xerogels
title_full_unstemmed A visual validation of the combined effect of pH and dilution on the porosity of carbon xerogels
title_sort A visual validation of the combined effect of pH and dilution on the porosity of carbon xerogels
dc.creator.none.fl_str_mv Rey Raap, Natalia
Arenillas de la Puente, Ana
Menéndez Díaz, José Ángel
author Rey Raap, Natalia
author_facet Rey Raap, Natalia
Arenillas de la Puente, Ana
Menéndez Díaz, José Ángel
author_role author
author2 Arenillas de la Puente, Ana
Menéndez Díaz, José Ángel
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Carbon xerogels
Microwave heating
Tailored porosity
Scanning electron microscope
topic Carbon xerogels
Microwave heating
Tailored porosity
Scanning electron microscope
description The hypothesis about the formation of the porous structure of carbon xerogels when the pH and the dilution ratio of the precursor solution are simultaneously modified has been validated by means of scanning electron microscope analysis. The morphology of the carbon xerogels showed that the size and number of the clusters produced during the sol–gel reaction is not only influenced by the pH but also by the dilution ratio. As with a decrease in the pH value, an increase in the dilution ratio caused the formation of a small number of large clusters, leading to materials with large pores. However, depending on the values selected the effect of the pH and dilution ratio was enhanced or diminished by the effect of the other. Hence, an appropriate adjustment of these two variables allowed microporous, micro-mesoporous and micro-macroporous materials to be obtained with pore volumes that could not be achieved by modifying the pH or the dilution ratio separately.
publishDate 2015
dc.date.none.fl_str_mv 2015
2016
2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/132917
url http://hdl.handle.net/10261/132917
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.micromeso.2015.10.044
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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