Hydrothermal preparation of highly photoactive TiO2 nanoparticles

TiO2 nanoparticles have been prepared by amine assisted sol–gel precipitation of Ti4+ aqueous solutions and further hydrothermal treatment. The effect of different starting acidic solution (nitric, chlorhydric and acetic acids) as well as the addition of triethylamine (TEA) at different pH has been...

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Detalhes bibliográficos
Autores: Hidalgo, M. C., Aguilar, M., Maicu, M., Navío, José Antonio, Colón, Gerardo
Formato: artículo
Fecha de publicación:2007
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/2745
Acesso em linha:http://hdl.handle.net/10261/2745
Access Level:acceso abierto
Palavra-chave:hydrothermal
Photocatalysis
triethylamine
sol-gel
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spelling Hydrothermal preparation of highly photoactive TiO2 nanoparticlesHidalgo, M. C.Aguilar, M.Maicu, M.Navío, José AntonioColón, GerardohydrothermalPhotocatalysistriethylaminesol-gelTiO2 nanoparticles have been prepared by amine assisted sol–gel precipitation of Ti4+ aqueous solutions and further hydrothermal treatment. The effect of different starting acidic solution (nitric, chlorhydric and acetic acids) as well as the addition of triethylamine (TEA) at different pH has been widely investigated. It has been stated that different amounts of TEA could have interesting effects upon hydrothermal treatment. Surface and morphological features significantly differ from TiO2 prepared using different synthetic route. In all cases, amine precipitated TiO2 obtained exhibit high conversion values for phenol photo-oxidation reaction, being in certain conditions higher than that exhibited by TiO2 Degussa P25. The precipitation of the acetic acidified solution leads to high surface area values and well crystallized anatase with small crystallite size. In addition, this set of catalysts show the cleanest surface after the hydrothermal treatment. The conjunction of these features would be the characteristic features responsible of the best photocatalytic activity observed.Peer reviewedConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]200820082007info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_65011968646 bytesapplication/pdfhttp://hdl.handle.net/10261/2745reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/27452026-05-22T06:33:51Z
dc.title.none.fl_str_mv Hydrothermal preparation of highly photoactive TiO2 nanoparticles
title Hydrothermal preparation of highly photoactive TiO2 nanoparticles
spellingShingle Hydrothermal preparation of highly photoactive TiO2 nanoparticles
Hidalgo, M. C.
hydrothermal
Photocatalysis
triethylamine
sol-gel
title_short Hydrothermal preparation of highly photoactive TiO2 nanoparticles
title_full Hydrothermal preparation of highly photoactive TiO2 nanoparticles
title_fullStr Hydrothermal preparation of highly photoactive TiO2 nanoparticles
title_full_unstemmed Hydrothermal preparation of highly photoactive TiO2 nanoparticles
title_sort Hydrothermal preparation of highly photoactive TiO2 nanoparticles
dc.creator.none.fl_str_mv Hidalgo, M. C.
Aguilar, M.
Maicu, M.
Navío, José Antonio
Colón, Gerardo
author Hidalgo, M. C.
author_facet Hidalgo, M. C.
Aguilar, M.
Maicu, M.
Navío, José Antonio
Colón, Gerardo
author_role author
author2 Aguilar, M.
Maicu, M.
Navío, José Antonio
Colón, Gerardo
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv hydrothermal
Photocatalysis
triethylamine
sol-gel
topic hydrothermal
Photocatalysis
triethylamine
sol-gel
description TiO2 nanoparticles have been prepared by amine assisted sol–gel precipitation of Ti4+ aqueous solutions and further hydrothermal treatment. The effect of different starting acidic solution (nitric, chlorhydric and acetic acids) as well as the addition of triethylamine (TEA) at different pH has been widely investigated. It has been stated that different amounts of TEA could have interesting effects upon hydrothermal treatment. Surface and morphological features significantly differ from TiO2 prepared using different synthetic route. In all cases, amine precipitated TiO2 obtained exhibit high conversion values for phenol photo-oxidation reaction, being in certain conditions higher than that exhibited by TiO2 Degussa P25. The precipitation of the acetic acidified solution leads to high surface area values and well crystallized anatase with small crystallite size. In addition, this set of catalysts show the cleanest surface after the hydrothermal treatment. The conjunction of these features would be the characteristic features responsible of the best photocatalytic activity observed.
publishDate 2007
dc.date.none.fl_str_mv 2007
2008
2008
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/2745
url http://hdl.handle.net/10261/2745
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1968646 bytes
application/pdf
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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