Assessment of surface acidity in mesoporous materials containing aluminum and titanium

Autores
Araújo, Rinaldo dos Santos; Soares Maia, Debora Aline; Azevedo, Diana Cristina Silva de; Cavalcante Jr., Celio Loureiro; Rodríguez Castellón, Enrique; Jiménez López, Antonio
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The surface acidity of mesoporous molecular sieves of aluminum and titanium was evaluated using four different techniques: n-butylamine volumetry, cyclohexylamine thermodesorption, temperature-programmed desorption of ammonia and adsorption of pyridine. The nature, strength and concentration of the acid sites were determined and correlated to the results of a probe reaction of anthracene oxidation to 9,10-anthraquinone (in liquid phase). In general, the surface acidity was highly influenced by the nature, location and coordination of the metal species (Al and Ti) in the mesoporous samples. Moderate to strong Brönsted acid sites were identified for the Al-MCM-41 sample in a large temperature range. For mesoporous materials containing Ti, the acidity was represented by a combination of weak to moderate Brönsted and Lewis acid sites. The Ti-HMS sample exhibits a higher acidity of moderate strength together with a well-balanced concentration of Brönsted and Lewis acid sites, which enhanced both conversion and selectivity in the oxidation reaction of anthracene. © 2009 Elsevier B.V. All rights reserved.
Fil: Araújo, Rinaldo dos Santos. Universidade Federal Do Ceara; Brasil
Fil: Soares Maia, Debora Aline. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; Argentina. Universidade Federal Do Ceara; Brasil
Fil: Azevedo, Diana Cristina Silva de. Universidade Federal Do Ceara; Brasil
Fil: Cavalcante Jr., Celio Loureiro. Universidade Federal Do Ceara; Brasil
Fil: Rodríguez Castellón, Enrique. Universidad de Málaga; España
Fil: Jiménez López, Antonio. Universidad de Málaga; España
Materia
MCM
HMS
TITANIUM
BRÖNSTED
LEWIS
REDOX ACTIVITY
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:11336/125774
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/125774
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Assessment of surface acidity in mesoporous materials containing aluminum and titaniumAraújo, Rinaldo dos SantosSoares Maia, Debora AlineAzevedo, Diana Cristina Silva deCavalcante Jr., Celio LoureiroRodríguez Castellón, EnriqueJiménez López, AntonioMCMHMSTITANIUMBRÖNSTEDLEWISREDOX ACTIVITYhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The surface acidity of mesoporous molecular sieves of aluminum and titanium was evaluated using four different techniques: n-butylamine volumetry, cyclohexylamine thermodesorption, temperature-programmed desorption of ammonia and adsorption of pyridine. The nature, strength and concentration of the acid sites were determined and correlated to the results of a probe reaction of anthracene oxidation to 9,10-anthraquinone (in liquid phase). In general, the surface acidity was highly influenced by the nature, location and coordination of the metal species (Al and Ti) in the mesoporous samples. Moderate to strong Brönsted acid sites were identified for the Al-MCM-41 sample in a large temperature range. For mesoporous materials containing Ti, the acidity was represented by a combination of weak to moderate Brönsted and Lewis acid sites. The Ti-HMS sample exhibits a higher acidity of moderate strength together with a well-balanced concentration of Brönsted and Lewis acid sites, which enhanced both conversion and selectivity in the oxidation reaction of anthracene. © 2009 Elsevier B.V. All rights reserved.Fil: Araújo, Rinaldo dos Santos. Universidade Federal Do Ceara; BrasilFil: Soares Maia, Debora Aline. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; Argentina. Universidade Federal Do Ceara; BrasilFil: Azevedo, Diana Cristina Silva de. Universidade Federal Do Ceara; BrasilFil: Cavalcante Jr., Celio Loureiro. Universidade Federal Do Ceara; BrasilFil: Rodríguez Castellón, Enrique. Universidad de Málaga; EspañaFil: Jiménez López, Antonio. Universidad de Málaga; EspañaElsevier Science2009-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/125774Araújo, Rinaldo dos Santos; Soares Maia, Debora Aline; Azevedo, Diana Cristina Silva de; Cavalcante Jr., Celio Loureiro; Rodríguez Castellón, Enrique; et al.; Assessment of surface acidity in mesoporous materials containing aluminum and titanium; Elsevier Science; Applied Surface Science; 255; 12; 1-4-2009; 6205-62090169-4332CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0169433209001081info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apsusc.2009.01.076info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:45:54Zoai:ri.conicet.gov.ar:11336/125774instacron: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:34982025-09-29 10:45:55.024CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Assessment of surface acidity in mesoporous materials containing aluminum and titanium
title Assessment of surface acidity in mesoporous materials containing aluminum and titanium
spellingShingle Assessment of surface acidity in mesoporous materials containing aluminum and titanium
Araújo, Rinaldo dos Santos
MCM
HMS
TITANIUM
BRÖNSTED
LEWIS
REDOX ACTIVITY
title_short Assessment of surface acidity in mesoporous materials containing aluminum and titanium
title_full Assessment of surface acidity in mesoporous materials containing aluminum and titanium
title_fullStr Assessment of surface acidity in mesoporous materials containing aluminum and titanium
title_full_unstemmed Assessment of surface acidity in mesoporous materials containing aluminum and titanium
title_sort Assessment of surface acidity in mesoporous materials containing aluminum and titanium
dc.creator.none.fl_str_mv Araújo, Rinaldo dos Santos
Soares Maia, Debora Aline
Azevedo, Diana Cristina Silva de
Cavalcante Jr., Celio Loureiro
Rodríguez Castellón, Enrique
Jiménez López, Antonio
author Araújo, Rinaldo dos Santos
author_facet Araújo, Rinaldo dos Santos
Soares Maia, Debora Aline
Azevedo, Diana Cristina Silva de
Cavalcante Jr., Celio Loureiro
Rodríguez Castellón, Enrique
Jiménez López, Antonio
author_role author
author2 Soares Maia, Debora Aline
Azevedo, Diana Cristina Silva de
Cavalcante Jr., Celio Loureiro
Rodríguez Castellón, Enrique
Jiménez López, Antonio
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv MCM
HMS
TITANIUM
BRÖNSTED
LEWIS
REDOX ACTIVITY
topic MCM
HMS
TITANIUM
BRÖNSTED
LEWIS
REDOX ACTIVITY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The surface acidity of mesoporous molecular sieves of aluminum and titanium was evaluated using four different techniques: n-butylamine volumetry, cyclohexylamine thermodesorption, temperature-programmed desorption of ammonia and adsorption of pyridine. The nature, strength and concentration of the acid sites were determined and correlated to the results of a probe reaction of anthracene oxidation to 9,10-anthraquinone (in liquid phase). In general, the surface acidity was highly influenced by the nature, location and coordination of the metal species (Al and Ti) in the mesoporous samples. Moderate to strong Brönsted acid sites were identified for the Al-MCM-41 sample in a large temperature range. For mesoporous materials containing Ti, the acidity was represented by a combination of weak to moderate Brönsted and Lewis acid sites. The Ti-HMS sample exhibits a higher acidity of moderate strength together with a well-balanced concentration of Brönsted and Lewis acid sites, which enhanced both conversion and selectivity in the oxidation reaction of anthracene. © 2009 Elsevier B.V. All rights reserved.
Fil: Araújo, Rinaldo dos Santos. Universidade Federal Do Ceara; Brasil
Fil: Soares Maia, Debora Aline. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; Argentina. Universidade Federal Do Ceara; Brasil
Fil: Azevedo, Diana Cristina Silva de. Universidade Federal Do Ceara; Brasil
Fil: Cavalcante Jr., Celio Loureiro. Universidade Federal Do Ceara; Brasil
Fil: Rodríguez Castellón, Enrique. Universidad de Málaga; España
Fil: Jiménez López, Antonio. Universidad de Málaga; España
description The surface acidity of mesoporous molecular sieves of aluminum and titanium was evaluated using four different techniques: n-butylamine volumetry, cyclohexylamine thermodesorption, temperature-programmed desorption of ammonia and adsorption of pyridine. The nature, strength and concentration of the acid sites were determined and correlated to the results of a probe reaction of anthracene oxidation to 9,10-anthraquinone (in liquid phase). In general, the surface acidity was highly influenced by the nature, location and coordination of the metal species (Al and Ti) in the mesoporous samples. Moderate to strong Brönsted acid sites were identified for the Al-MCM-41 sample in a large temperature range. For mesoporous materials containing Ti, the acidity was represented by a combination of weak to moderate Brönsted and Lewis acid sites. The Ti-HMS sample exhibits a higher acidity of moderate strength together with a well-balanced concentration of Brönsted and Lewis acid sites, which enhanced both conversion and selectivity in the oxidation reaction of anthracene. © 2009 Elsevier B.V. All rights reserved.
publishDate 2009
dc.date.none.fl_str_mv 2009-04-01
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/11336/125774
Araújo, Rinaldo dos Santos; Soares Maia, Debora Aline; Azevedo, Diana Cristina Silva de; Cavalcante Jr., Celio Loureiro; Rodríguez Castellón, Enrique; et al.; Assessment of surface acidity in mesoporous materials containing aluminum and titanium; Elsevier Science; Applied Surface Science; 255; 12; 1-4-2009; 6205-6209
0169-4332
CONICET Digital
CONICET
url http://hdl.handle.net/11336/125774
identifier_str_mv Araújo, Rinaldo dos Santos; Soares Maia, Debora Aline; Azevedo, Diana Cristina Silva de; Cavalcante Jr., Celio Loureiro; Rodríguez Castellón, Enrique; et al.; Assessment of surface acidity in mesoporous materials containing aluminum and titanium; Elsevier Science; Applied Surface Science; 255; 12; 1-4-2009; 6205-6209
0169-4332
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0169433209001081
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apsusc.2009.01.076
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 Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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
_version_ 1844614499759292416
score 13.070432

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