Preparation of Nanostructured TiO2 Films with High Catalytic Activity and their 3D-Spatial Distribution of Anatase and Rutile Phases

[EN] In this study, a facile, cheap, scalable, and environmentally friendly method has been developed to prepare nanostructured TiO2 coatings with a high catalytic activity. In addition, a protocol to characterize the prepared films in order to obtain consistent results between their structure, thei...

Full description

Bibliographic Details
Authors: Colomer, María T., Campo, Ángel Adolfo del
Format: article
Status:Versión aceptada para publicación
Publication Date:2019
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/229060
Online Access:http://hdl.handle.net/10261/229060
Access Level:Open access
Keyword:Anatase
Rutile
Coatings
Dip-coating
Catalysis
Confocal micro-Raman
id ES_d25570b3f3d6066122507d00a9bc7b88
oai_identifier_str oai:digital.csic.es:10261/229060
network_acronym_str ES
network_name_str España
repository_id_str
spelling Preparation of Nanostructured TiO2 Films with High Catalytic Activity and their 3D-Spatial Distribution of Anatase and Rutile PhasesColomer, María T.Campo, Ángel Adolfo delAnataseRutileCoatingsDip-coatingCatalysisConfocal micro-Raman[EN] In this study, a facile, cheap, scalable, and environmentally friendly method has been developed to prepare nanostructured TiO2 coatings with a high catalytic activity. In addition, a protocol to characterize the prepared films in order to obtain consistent results between their structure, their microstructure, and their catalytic behavior, has been established. For that, two types of TiO2 coatings have been fabricated by applying once TiO2 aqueous suspensions, prepared form commercial nanopowders, by immersion followed by an adequate thermal treatment. The first type of films is constituted by coatings with anatase as single phase, and the second one by films with a rutile molar fraction of XR = 0.07  0.02, determined from grazing incidence X-ray diffraction (GI-XRD) data. High spatial resolution chemical imaging, obtained by confocal Raman microscopy (CRM), of the surface and of the cross-section for the films shows a good distribution of rutile without any segregation of this phase. Furthermore, high resolution electron microscopy (HREM) confirmed the presence of anatase/rutile biphasic domains in those areas in which both phases were previously found together by CRM. In addition, the catalytic data fit to a first-order kinetic model with high catalytic reaction constants (k’), especially when rutile is present. Furthermore, consistent results have been found in this study between textural, structural and microstructural features with catalytic properties for the prepared TiO2 films.This work was supported by MINECO (Government of Spain) and Feder Funds under Grant no. MAT2016-78700-R. The authors are also grateful to Mrs. C. Díaz-Dorado for her help in the preparation of FEG-SEM, TEM, and HREM pictures.Kluwer Academic PublishersMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2021202120192021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/229060reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2016-78700-Rhttp://dx.doi.org/10.1007/s10853-019-03550-4Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2290602026-05-22T06:33:51Z
dc.title.none.fl_str_mv Preparation of Nanostructured TiO2 Films with High Catalytic Activity and their 3D-Spatial Distribution of Anatase and Rutile Phases
title Preparation of Nanostructured TiO2 Films with High Catalytic Activity and their 3D-Spatial Distribution of Anatase and Rutile Phases
spellingShingle Preparation of Nanostructured TiO2 Films with High Catalytic Activity and their 3D-Spatial Distribution of Anatase and Rutile Phases
Colomer, María T.
Anatase
Rutile
Coatings
Dip-coating
Catalysis
Confocal micro-Raman
title_short Preparation of Nanostructured TiO2 Films with High Catalytic Activity and their 3D-Spatial Distribution of Anatase and Rutile Phases
title_full Preparation of Nanostructured TiO2 Films with High Catalytic Activity and their 3D-Spatial Distribution of Anatase and Rutile Phases
title_fullStr Preparation of Nanostructured TiO2 Films with High Catalytic Activity and their 3D-Spatial Distribution of Anatase and Rutile Phases
title_full_unstemmed Preparation of Nanostructured TiO2 Films with High Catalytic Activity and their 3D-Spatial Distribution of Anatase and Rutile Phases
title_sort Preparation of Nanostructured TiO2 Films with High Catalytic Activity and their 3D-Spatial Distribution of Anatase and Rutile Phases
dc.creator.none.fl_str_mv Colomer, María T.
Campo, Ángel Adolfo del
author Colomer, María T.
author_facet Colomer, María T.
Campo, Ángel Adolfo del
author_role author
author2 Campo, Ángel Adolfo del
author2_role 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 Anatase
Rutile
Coatings
Dip-coating
Catalysis
Confocal micro-Raman
topic Anatase
Rutile
Coatings
Dip-coating
Catalysis
Confocal micro-Raman
description [EN] In this study, a facile, cheap, scalable, and environmentally friendly method has been developed to prepare nanostructured TiO2 coatings with a high catalytic activity. In addition, a protocol to characterize the prepared films in order to obtain consistent results between their structure, their microstructure, and their catalytic behavior, has been established. For that, two types of TiO2 coatings have been fabricated by applying once TiO2 aqueous suspensions, prepared form commercial nanopowders, by immersion followed by an adequate thermal treatment. The first type of films is constituted by coatings with anatase as single phase, and the second one by films with a rutile molar fraction of XR = 0.07  0.02, determined from grazing incidence X-ray diffraction (GI-XRD) data. High spatial resolution chemical imaging, obtained by confocal Raman microscopy (CRM), of the surface and of the cross-section for the films shows a good distribution of rutile without any segregation of this phase. Furthermore, high resolution electron microscopy (HREM) confirmed the presence of anatase/rutile biphasic domains in those areas in which both phases were previously found together by CRM. In addition, the catalytic data fit to a first-order kinetic model with high catalytic reaction constants (k’), especially when rutile is present. Furthermore, consistent results have been found in this study between textural, structural and microstructural features with catalytic properties for the prepared TiO2 films.
publishDate 2019
dc.date.none.fl_str_mv 2019
2021
2021
2021
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/10261/229060
url http://hdl.handle.net/10261/229060
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2016-78700-R
http://dx.doi.org/10.1007/s10853-019-03550-4
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Kluwer Academic Publishers
publisher.none.fl_str_mv Kluwer Academic Publishers
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
_version_ 1869420341463351296
score 15,81155

Similar Items