Photocatalytic NOx removal in bismuth-oxyhalide (BiOX, X = I, Cl) cement-based materials exposed to outdoor conditions

Cement-based materials modified with 3D BiOX (X = I, Cl) microspheres at different percentages (1, 5 and 10% by weight of the cement binder) were prepared to investigate the durability of the photocatalytic NO removal under outdoor conditions. Weathering—corresponding to a period of 13 months outdoo...

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Detalles Bibliográficos
Autores: Nava-Núñez, Magaly Y., Jiménez-Relinque, Eva, Martínez-de la Cruz, Azael, Castellote, Marta
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/296488
Acceso en línea:http://hdl.handle.net/10261/296488
http://doi.org/10.3390/catal12090982
Access Level:acceso abierto
Palabra clave:Biox
Photocatalysis
Mortar
Nox
Outdoor Exposure
Self-Deactivation
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spelling Photocatalytic NOx removal in bismuth-oxyhalide (BiOX, X = I, Cl) cement-based materials exposed to outdoor conditionsNava-Núñez, Magaly Y.Jiménez-Relinque, EvaMartínez-de la Cruz, AzaelCastellote, MartaBioxPhotocatalysisMortarNoxOutdoor ExposureSelf-DeactivationCement-based materials modified with 3D BiOX (X = I, Cl) microspheres at different percentages (1, 5 and 10% by weight of the cement binder) were prepared to investigate the durability of the photocatalytic NO removal under outdoor conditions. Weathering—corresponding to a period of 13 months outdoors—was studied in terms of NO removal efficiency under visible and UVA light irradiation for BiOI and BiOCl mortars, respectively. Following this period, the samples were protected from the environment for four years, and NO removal and selectivity to nitrates were assessed. BiOI and BiOCl mortar samples were initially photocatalytically active; NO removal performance increased as BiOX content increased. There was good photocatalyst dispersion, and compressive strength was not significantly impacted. The BiOI mortars had nearly completely lost their activity after 5 years from casting, whereas mortars containing 10% BiOCl had maintained about 7% of initial performance. The results suggest that mortar deactivation is due to surface dirt and nitrates accumulation from NO oxidation on the surface rather than carbonation. An internal self-deactivation mechanism that affects BiOI in mortar matrix has also been postulated.Multidisciplinary Digital Publishing InstituteConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2023202320222023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/296488http://doi.org/10.3390/catal12090982reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://doi.org/10.3390/catal12090982Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2964882026-05-22T06:33:51Z
dc.title.none.fl_str_mv Photocatalytic NOx removal in bismuth-oxyhalide (BiOX, X = I, Cl) cement-based materials exposed to outdoor conditions
title Photocatalytic NOx removal in bismuth-oxyhalide (BiOX, X = I, Cl) cement-based materials exposed to outdoor conditions
spellingShingle Photocatalytic NOx removal in bismuth-oxyhalide (BiOX, X = I, Cl) cement-based materials exposed to outdoor conditions
Nava-Núñez, Magaly Y.
Biox
Photocatalysis
Mortar
Nox
Outdoor Exposure
Self-Deactivation
title_short Photocatalytic NOx removal in bismuth-oxyhalide (BiOX, X = I, Cl) cement-based materials exposed to outdoor conditions
title_full Photocatalytic NOx removal in bismuth-oxyhalide (BiOX, X = I, Cl) cement-based materials exposed to outdoor conditions
title_fullStr Photocatalytic NOx removal in bismuth-oxyhalide (BiOX, X = I, Cl) cement-based materials exposed to outdoor conditions
title_full_unstemmed Photocatalytic NOx removal in bismuth-oxyhalide (BiOX, X = I, Cl) cement-based materials exposed to outdoor conditions
title_sort Photocatalytic NOx removal in bismuth-oxyhalide (BiOX, X = I, Cl) cement-based materials exposed to outdoor conditions
dc.creator.none.fl_str_mv Nava-Núñez, Magaly Y.
Jiménez-Relinque, Eva
Martínez-de la Cruz, Azael
Castellote, Marta
author Nava-Núñez, Magaly Y.
author_facet Nava-Núñez, Magaly Y.
Jiménez-Relinque, Eva
Martínez-de la Cruz, Azael
Castellote, Marta
author_role author
author2 Jiménez-Relinque, Eva
Martínez-de la Cruz, Azael
Castellote, Marta
author2_role author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Biox
Photocatalysis
Mortar
Nox
Outdoor Exposure
Self-Deactivation
topic Biox
Photocatalysis
Mortar
Nox
Outdoor Exposure
Self-Deactivation
description Cement-based materials modified with 3D BiOX (X = I, Cl) microspheres at different percentages (1, 5 and 10% by weight of the cement binder) were prepared to investigate the durability of the photocatalytic NO removal under outdoor conditions. Weathering—corresponding to a period of 13 months outdoors—was studied in terms of NO removal efficiency under visible and UVA light irradiation for BiOI and BiOCl mortars, respectively. Following this period, the samples were protected from the environment for four years, and NO removal and selectivity to nitrates were assessed. BiOI and BiOCl mortar samples were initially photocatalytically active; NO removal performance increased as BiOX content increased. There was good photocatalyst dispersion, and compressive strength was not significantly impacted. The BiOI mortars had nearly completely lost their activity after 5 years from casting, whereas mortars containing 10% BiOCl had maintained about 7% of initial performance. The results suggest that mortar deactivation is due to surface dirt and nitrates accumulation from NO oxidation on the surface rather than carbonation. An internal self-deactivation mechanism that affects BiOI in mortar matrix has also been postulated.
publishDate 2022
dc.date.none.fl_str_mv 2022
2023
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/296488
http://doi.org/10.3390/catal12090982
url http://hdl.handle.net/10261/296488
http://doi.org/10.3390/catal12090982
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://doi.org/10.3390/catal12090982
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
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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