Effect of hydrothermal treatmenton Cr-SiO2 mesoporous materials

Autores
Cuesta Zapata, Pablo Martín; Nazzarro, Marcelo Sandro; Parentis, Monica Liliana; Gonzo, Elio Emilio; Bonini, Norberto Alejandro
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Cr/SiO2 (MCM-41) materials were prepared by the sol–gel method by hydrolysis of tetraethylortosilicate (TEOS) using cetyltrimethylammonium bromide (CTAB) as a template. The effect of hydrothermal treatment between 120–220 °C on the structural properties was studied. Well ordered Cr/MCM-41 with a very narrow pore size distribution was obtained after hydrothermal treatment from RT to 150 °C. Materials synthesized at higher temperatures (200 or 220 °C) showed the collapse of the ordered mesoestructure to give mesoporous Cr/SiO2 with an open surface. Superficial Cr3+/Cr6+ ratio was determined by XPS over materials hydrothermically synthesized at different temperatures, and calcined in air at 300 °C. The hydrothermal treatment improved the chromium to silica interaction, promoting a higher resistance to form Chromium (VI) sites. The chromium (III) ions incorporated to the silica structure developed acid sites responsible for the 2-PrOH dehydration.
Fil: Cuesta Zapata, Pablo Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Investigación Para la Industria Química (i); Argentina
Fil: Nazzarro, Marcelo Sandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; Argentina
Fil: Parentis, Monica Liliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Investigación Para la Industria Química (i); Argentina
Fil: Gonzo, Elio Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Investigación Para la Industria Química (i); Argentina
Fil: Bonini, Norberto Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Investigación Para la Industria Química (i); Argentina
Materia
Mesoporous
Chromium
Sol-Gel
Catalysts
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/5666
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/5666
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Effect of hydrothermal treatmenton Cr-SiO2 mesoporous materialsCuesta Zapata, Pablo MartínNazzarro, Marcelo SandroParentis, Monica LilianaGonzo, Elio EmilioBonini, Norberto AlejandroMesoporousChromiumSol-GelCatalystshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Cr/SiO2 (MCM-41) materials were prepared by the sol–gel method by hydrolysis of tetraethylortosilicate (TEOS) using cetyltrimethylammonium bromide (CTAB) as a template. The effect of hydrothermal treatment between 120–220 °C on the structural properties was studied. Well ordered Cr/MCM-41 with a very narrow pore size distribution was obtained after hydrothermal treatment from RT to 150 °C. Materials synthesized at higher temperatures (200 or 220 °C) showed the collapse of the ordered mesoestructure to give mesoporous Cr/SiO2 with an open surface. Superficial Cr3+/Cr6+ ratio was determined by XPS over materials hydrothermically synthesized at different temperatures, and calcined in air at 300 °C. The hydrothermal treatment improved the chromium to silica interaction, promoting a higher resistance to form Chromium (VI) sites. The chromium (III) ions incorporated to the silica structure developed acid sites responsible for the 2-PrOH dehydration.Fil: Cuesta Zapata, Pablo Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Investigación Para la Industria Química (i); ArgentinaFil: Nazzarro, Marcelo Sandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; ArgentinaFil: Parentis, Monica Liliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Investigación Para la Industria Química (i); ArgentinaFil: Gonzo, Elio Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Investigación Para la Industria Química (i); ArgentinaFil: Bonini, Norberto Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Investigación Para la Industria Química (i); ArgentinaElsevier2013-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/5666Cuesta Zapata, Pablo Martín; Nazzarro, Marcelo Sandro; Parentis, Monica Liliana; Gonzo, Elio Emilio; Bonini, Norberto Alejandro; Effect of hydrothermal treatmenton Cr-SiO2 mesoporous materials; Elsevier; Chemical Engineering Science; 101; 7-2013; 374-3810009-2509enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0009250913004648info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ces.2013.06.041info:eu-repo/semantics/altIdentifier/url/10.1016/j.ces.2013.06.041info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:02:18Zoai:ri.conicet.gov.ar:11336/5666instacron: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:34982025-10-22 11:02:18.588CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Effect of hydrothermal treatmenton Cr-SiO2 mesoporous materials
title Effect of hydrothermal treatmenton Cr-SiO2 mesoporous materials
spellingShingle Effect of hydrothermal treatmenton Cr-SiO2 mesoporous materials
Cuesta Zapata, Pablo Martín
Mesoporous
Chromium
Sol-Gel
Catalysts
title_short Effect of hydrothermal treatmenton Cr-SiO2 mesoporous materials
title_full Effect of hydrothermal treatmenton Cr-SiO2 mesoporous materials
title_fullStr Effect of hydrothermal treatmenton Cr-SiO2 mesoporous materials
title_full_unstemmed Effect of hydrothermal treatmenton Cr-SiO2 mesoporous materials
title_sort Effect of hydrothermal treatmenton Cr-SiO2 mesoporous materials
dc.creator.none.fl_str_mv Cuesta Zapata, Pablo Martín
Nazzarro, Marcelo Sandro
Parentis, Monica Liliana
Gonzo, Elio Emilio
Bonini, Norberto Alejandro
author Cuesta Zapata, Pablo Martín
author_facet Cuesta Zapata, Pablo Martín
Nazzarro, Marcelo Sandro
Parentis, Monica Liliana
Gonzo, Elio Emilio
Bonini, Norberto Alejandro
author_role author
author2 Nazzarro, Marcelo Sandro
Parentis, Monica Liliana
Gonzo, Elio Emilio
Bonini, Norberto Alejandro
author2_role author
author
author
author
dc.subject.none.fl_str_mv Mesoporous
Chromium
Sol-Gel
Catalysts
topic Mesoporous
Chromium
Sol-Gel
Catalysts
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Cr/SiO2 (MCM-41) materials were prepared by the sol–gel method by hydrolysis of tetraethylortosilicate (TEOS) using cetyltrimethylammonium bromide (CTAB) as a template. The effect of hydrothermal treatment between 120–220 °C on the structural properties was studied. Well ordered Cr/MCM-41 with a very narrow pore size distribution was obtained after hydrothermal treatment from RT to 150 °C. Materials synthesized at higher temperatures (200 or 220 °C) showed the collapse of the ordered mesoestructure to give mesoporous Cr/SiO2 with an open surface. Superficial Cr3+/Cr6+ ratio was determined by XPS over materials hydrothermically synthesized at different temperatures, and calcined in air at 300 °C. The hydrothermal treatment improved the chromium to silica interaction, promoting a higher resistance to form Chromium (VI) sites. The chromium (III) ions incorporated to the silica structure developed acid sites responsible for the 2-PrOH dehydration.
Fil: Cuesta Zapata, Pablo Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Investigación Para la Industria Química (i); Argentina
Fil: Nazzarro, Marcelo Sandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Física Aplicada; Argentina
Fil: Parentis, Monica Liliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Investigación Para la Industria Química (i); Argentina
Fil: Gonzo, Elio Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Investigación Para la Industria Química (i); Argentina
Fil: Bonini, Norberto Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Investigación Para la Industria Química (i); Argentina
description Cr/SiO2 (MCM-41) materials were prepared by the sol–gel method by hydrolysis of tetraethylortosilicate (TEOS) using cetyltrimethylammonium bromide (CTAB) as a template. The effect of hydrothermal treatment between 120–220 °C on the structural properties was studied. Well ordered Cr/MCM-41 with a very narrow pore size distribution was obtained after hydrothermal treatment from RT to 150 °C. Materials synthesized at higher temperatures (200 or 220 °C) showed the collapse of the ordered mesoestructure to give mesoporous Cr/SiO2 with an open surface. Superficial Cr3+/Cr6+ ratio was determined by XPS over materials hydrothermically synthesized at different temperatures, and calcined in air at 300 °C. The hydrothermal treatment improved the chromium to silica interaction, promoting a higher resistance to form Chromium (VI) sites. The chromium (III) ions incorporated to the silica structure developed acid sites responsible for the 2-PrOH dehydration.
publishDate 2013
dc.date.none.fl_str_mv 2013-07
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/11336/5666
Cuesta Zapata, Pablo Martín; Nazzarro, Marcelo Sandro; Parentis, Monica Liliana; Gonzo, Elio Emilio; Bonini, Norberto Alejandro; Effect of hydrothermal treatmenton Cr-SiO2 mesoporous materials; Elsevier; Chemical Engineering Science; 101; 7-2013; 374-381
0009-2509
url http://hdl.handle.net/11336/5666
identifier_str_mv Cuesta Zapata, Pablo Martín; Nazzarro, Marcelo Sandro; Parentis, Monica Liliana; Gonzo, Elio Emilio; Bonini, Norberto Alejandro; Effect of hydrothermal treatmenton Cr-SiO2 mesoporous materials; Elsevier; Chemical Engineering Science; 101; 7-2013; 374-381
0009-2509
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0009250913004648
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ces.2013.06.041
info:eu-repo/semantics/altIdentifier/url/10.1016/j.ces.2013.06.041
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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_ 1846781227865997312
score 12.982451

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