Optical and Physicochemical Properties of Silica-Supported TiO2 Photocatalysts

Autores
Marugán, Javier; Van Grieken, Rafael; Alfano, Orlando Mario; Cassano, Alberto Enrique
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Commercial applications of photocatalysis in slurry reactors employing titanium dioxide particles present the disadvantage of the additional cost associated with the downstream catalyst separation. In past years a significant effort has been made to develop supported titania photocatalysts on particles of larger size in order to facilitate the sedimentation recovery process. In this work, two different silica materials have been used for preparing immobilized catalysts. Their physicochemical characteristics have been compared with those corresponding to two commercially available unsupported titanium dioxide catalysts. However, for reaction kinetics and reactor design purposes, three additional properties must be known: (i) the spectral specific radiation absorption coefficient, (ii) the spectral specific radiation scattering coefficient, and (iii) the asymmetry factor of a model for the angular distribution of the scattered photons (the phase function). They have been determined with specially designed spectrophotometer transmission, diffuse transmittance, and diffuse reflectance experiments and constitute the most significant addition to this contribution.
Fil: Marugán, Javier. Universidad Rey Juan Carlos; España
Fil: Van Grieken, Rafael. Universidad Rey Juan Carlos; España
Fil: Alfano, Orlando Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Cassano, Alberto Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Materia
Optical Properties
Radiation Absorption
Radiation Scattering
Slurry Photoreactor
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/21445
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Optical and Physicochemical Properties of Silica-Supported TiO2 PhotocatalystsMarugán, JavierVan Grieken, RafaelAlfano, Orlando MarioCassano, Alberto EnriqueOptical PropertiesRadiation AbsorptionRadiation ScatteringSlurry Photoreactorhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Commercial applications of photocatalysis in slurry reactors employing titanium dioxide particles present the disadvantage of the additional cost associated with the downstream catalyst separation. In past years a significant effort has been made to develop supported titania photocatalysts on particles of larger size in order to facilitate the sedimentation recovery process. In this work, two different silica materials have been used for preparing immobilized catalysts. Their physicochemical characteristics have been compared with those corresponding to two commercially available unsupported titanium dioxide catalysts. However, for reaction kinetics and reactor design purposes, three additional properties must be known: (i) the spectral specific radiation absorption coefficient, (ii) the spectral specific radiation scattering coefficient, and (iii) the asymmetry factor of a model for the angular distribution of the scattered photons (the phase function). They have been determined with specially designed spectrophotometer transmission, diffuse transmittance, and diffuse reflectance experiments and constitute the most significant addition to this contribution.Fil: Marugán, Javier. Universidad Rey Juan Carlos; EspañaFil: Van Grieken, Rafael. Universidad Rey Juan Carlos; EspañaFil: Alfano, Orlando Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Cassano, Alberto Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaWiley2006-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/21445Marugán, Javier; Van Grieken, Rafael; Alfano, Orlando Mario; Cassano, Alberto Enrique; Optical and Physicochemical Properties of Silica-Supported TiO2 Photocatalysts; Wiley; Aiche Journal; 52; 8; 12-2006; 2832-28430001-1541CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/aic.10886info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/aic.10886/abstractinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:06:32Zoai:ri.conicet.gov.ar:11336/21445instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-10 13:06:32.552CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Optical and Physicochemical Properties of Silica-Supported TiO2 Photocatalysts
title Optical and Physicochemical Properties of Silica-Supported TiO2 Photocatalysts
spellingShingle Optical and Physicochemical Properties of Silica-Supported TiO2 Photocatalysts
Marugán, Javier
Optical Properties
Radiation Absorption
Radiation Scattering
Slurry Photoreactor
title_short Optical and Physicochemical Properties of Silica-Supported TiO2 Photocatalysts
title_full Optical and Physicochemical Properties of Silica-Supported TiO2 Photocatalysts
title_fullStr Optical and Physicochemical Properties of Silica-Supported TiO2 Photocatalysts
title_full_unstemmed Optical and Physicochemical Properties of Silica-Supported TiO2 Photocatalysts
title_sort Optical and Physicochemical Properties of Silica-Supported TiO2 Photocatalysts
dc.creator.none.fl_str_mv Marugán, Javier
Van Grieken, Rafael
Alfano, Orlando Mario
Cassano, Alberto Enrique
author Marugán, Javier
author_facet Marugán, Javier
Van Grieken, Rafael
Alfano, Orlando Mario
Cassano, Alberto Enrique
author_role author
author2 Van Grieken, Rafael
Alfano, Orlando Mario
Cassano, Alberto Enrique
author2_role author
author
author
dc.subject.none.fl_str_mv Optical Properties
Radiation Absorption
Radiation Scattering
Slurry Photoreactor
topic Optical Properties
Radiation Absorption
Radiation Scattering
Slurry Photoreactor
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Commercial applications of photocatalysis in slurry reactors employing titanium dioxide particles present the disadvantage of the additional cost associated with the downstream catalyst separation. In past years a significant effort has been made to develop supported titania photocatalysts on particles of larger size in order to facilitate the sedimentation recovery process. In this work, two different silica materials have been used for preparing immobilized catalysts. Their physicochemical characteristics have been compared with those corresponding to two commercially available unsupported titanium dioxide catalysts. However, for reaction kinetics and reactor design purposes, three additional properties must be known: (i) the spectral specific radiation absorption coefficient, (ii) the spectral specific radiation scattering coefficient, and (iii) the asymmetry factor of a model for the angular distribution of the scattered photons (the phase function). They have been determined with specially designed spectrophotometer transmission, diffuse transmittance, and diffuse reflectance experiments and constitute the most significant addition to this contribution.
Fil: Marugán, Javier. Universidad Rey Juan Carlos; España
Fil: Van Grieken, Rafael. Universidad Rey Juan Carlos; España
Fil: Alfano, Orlando Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Cassano, Alberto Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
description Commercial applications of photocatalysis in slurry reactors employing titanium dioxide particles present the disadvantage of the additional cost associated with the downstream catalyst separation. In past years a significant effort has been made to develop supported titania photocatalysts on particles of larger size in order to facilitate the sedimentation recovery process. In this work, two different silica materials have been used for preparing immobilized catalysts. Their physicochemical characteristics have been compared with those corresponding to two commercially available unsupported titanium dioxide catalysts. However, for reaction kinetics and reactor design purposes, three additional properties must be known: (i) the spectral specific radiation absorption coefficient, (ii) the spectral specific radiation scattering coefficient, and (iii) the asymmetry factor of a model for the angular distribution of the scattered photons (the phase function). They have been determined with specially designed spectrophotometer transmission, diffuse transmittance, and diffuse reflectance experiments and constitute the most significant addition to this contribution.
publishDate 2006
dc.date.none.fl_str_mv 2006-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/21445
Marugán, Javier; Van Grieken, Rafael; Alfano, Orlando Mario; Cassano, Alberto Enrique; Optical and Physicochemical Properties of Silica-Supported TiO2 Photocatalysts; Wiley; Aiche Journal; 52; 8; 12-2006; 2832-2843
0001-1541
CONICET Digital
CONICET
url http://hdl.handle.net/11336/21445
identifier_str_mv Marugán, Javier; Van Grieken, Rafael; Alfano, Orlando Mario; Cassano, Alberto Enrique; Optical and Physicochemical Properties of Silica-Supported TiO2 Photocatalysts; Wiley; Aiche Journal; 52; 8; 12-2006; 2832-2843
0001-1541
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1002/aic.10886
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/aic.10886/abstract
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.993085

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