Ecofriendly liquid phase oxidation with hydrogen peroxide of 2,6-dimethylphenol to 2,6-dimethyl-1,4-benzoquinone catalyzed by TiO2-CeO2 mixed xerogels

Autores
Palacio, Magdalena; Villabrille, Paula Isabel; Romanelli, Gustavo Pablo; Vazquez, Patricia Graciela; Caceres, Carmen Victoria
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Titania–ceria mixed xerogels were prepared with 10% (w/w) CeO2 and different pH values during the sol–gel process. The gels were dried in air and calcined at different temperature. Moreover, a sample without cerium, 100% (w/w) TiO2, was prepared to be kept as reference material. The prepared solids were characterized by means of XRD, SEM, DRS, FT-IR, TEM and EDX. Their textural properties were determined by adsorption–desorption isotherms of N2 at 77 K. The xerogels were tested as catalysts in the liquid phase oxidation of 2,6-dimethylphenol at 20 °C, using ethanol as solvent and aqueous hydrogen peroxide as a clean oxidizing agent. The 2,6-dimethyl-p-benzoquinone yield achieved was of 85–96% using the mixed xerogels as catalysts, and of 49% when the catalyst of titania without cerium was used. The best performance was achieved by the mixed xerogel synthesized at pH 4 and calcined at 200 °C; 100% of conversion of 2,6-dimethylphenol and 96% of yield in 2,6-dimethyl-p-benzoquinone were obtained in this case after 6 h of reaction. The reactions were again carried out with the catalyst recovered after its first use. Only a light yield decrease, lower than 2%, was observed. The use of an ethanol–water mixture as solvent (35:65% (v/v)) in the reaction was studied in order to make the reaction more environmentally friendly. Total conversion of the initial reactant, after 4 h of reaction at 20 °C, with 70% yield in 2,6-dimethyl-p-benzoquinone (2,6-DMBQ), was observed. Under these conditions a red by-product, insoluble in the reaction solution, was formed. This by-product was isolated and characterized and it was possible to identify it as 2,6-DMBQ dimmer (3,3′,5,5′-tetramethyl-4,4′-diphenoquinone). This by-product was observed in very few amounts when ethanol (96% (v/v)) was used as solvent.
Fil: Palacio, Magdalena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Villabrille, Paula Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Romanelli, Gustavo Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Vazquez, Patricia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Caceres, Carmen Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Materia
Titania/Ceria
Xerogel
Oxidation
Liquid Phase
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:11336/31963
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/31963
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Ecofriendly liquid phase oxidation with hydrogen peroxide of 2,6-dimethylphenol to 2,6-dimethyl-1,4-benzoquinone catalyzed by TiO2-CeO2 mixed xerogelsPalacio, MagdalenaVillabrille, Paula IsabelRomanelli, Gustavo PabloVazquez, Patricia GracielaCaceres, Carmen VictoriaTitania/CeriaXerogelOxidationLiquid Phasehttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Titania–ceria mixed xerogels were prepared with 10% (w/w) CeO2 and different pH values during the sol–gel process. The gels were dried in air and calcined at different temperature. Moreover, a sample without cerium, 100% (w/w) TiO2, was prepared to be kept as reference material. The prepared solids were characterized by means of XRD, SEM, DRS, FT-IR, TEM and EDX. Their textural properties were determined by adsorption–desorption isotherms of N2 at 77 K. The xerogels were tested as catalysts in the liquid phase oxidation of 2,6-dimethylphenol at 20 °C, using ethanol as solvent and aqueous hydrogen peroxide as a clean oxidizing agent. The 2,6-dimethyl-p-benzoquinone yield achieved was of 85–96% using the mixed xerogels as catalysts, and of 49% when the catalyst of titania without cerium was used. The best performance was achieved by the mixed xerogel synthesized at pH 4 and calcined at 200 °C; 100% of conversion of 2,6-dimethylphenol and 96% of yield in 2,6-dimethyl-p-benzoquinone were obtained in this case after 6 h of reaction. The reactions were again carried out with the catalyst recovered after its first use. Only a light yield decrease, lower than 2%, was observed. The use of an ethanol–water mixture as solvent (35:65% (v/v)) in the reaction was studied in order to make the reaction more environmentally friendly. Total conversion of the initial reactant, after 4 h of reaction at 20 °C, with 70% yield in 2,6-dimethyl-p-benzoquinone (2,6-DMBQ), was observed. Under these conditions a red by-product, insoluble in the reaction solution, was formed. This by-product was isolated and characterized and it was possible to identify it as 2,6-DMBQ dimmer (3,3′,5,5′-tetramethyl-4,4′-diphenoquinone). This by-product was observed in very few amounts when ethanol (96% (v/v)) was used as solvent.Fil: Palacio, Magdalena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; ArgentinaFil: Villabrille, Paula Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; ArgentinaFil: Romanelli, Gustavo Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; ArgentinaFil: Vazquez, Patricia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; ArgentinaFil: Caceres, Carmen Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; ArgentinaElsevier Science2009-03-03info: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/11336/31963Caceres, Carmen Victoria; Vazquez, Patricia Graciela; Romanelli, Gustavo Pablo; Villabrille, Paula Isabel; Palacio, Magdalena; Ecofriendly liquid phase oxidation with hydrogen peroxide of 2,6-dimethylphenol to 2,6-dimethyl-1,4-benzoquinone catalyzed by TiO2-CeO2 mixed xerogels; Elsevier Science; Applied Catalysis A: General; 359; 1-2; 3-3-2009; 62-680926-860XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0926860X09001537info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apcata.2009.02.032info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:12:36Zoai:ri.conicet.gov.ar:11336/31963instacron: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:34982025-10-15 15:12:36.769CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Ecofriendly liquid phase oxidation with hydrogen peroxide of 2,6-dimethylphenol to 2,6-dimethyl-1,4-benzoquinone catalyzed by TiO2-CeO2 mixed xerogels
title Ecofriendly liquid phase oxidation with hydrogen peroxide of 2,6-dimethylphenol to 2,6-dimethyl-1,4-benzoquinone catalyzed by TiO2-CeO2 mixed xerogels
spellingShingle Ecofriendly liquid phase oxidation with hydrogen peroxide of 2,6-dimethylphenol to 2,6-dimethyl-1,4-benzoquinone catalyzed by TiO2-CeO2 mixed xerogels
Palacio, Magdalena
Titania/Ceria
Xerogel
Oxidation
Liquid Phase
title_short Ecofriendly liquid phase oxidation with hydrogen peroxide of 2,6-dimethylphenol to 2,6-dimethyl-1,4-benzoquinone catalyzed by TiO2-CeO2 mixed xerogels
title_full Ecofriendly liquid phase oxidation with hydrogen peroxide of 2,6-dimethylphenol to 2,6-dimethyl-1,4-benzoquinone catalyzed by TiO2-CeO2 mixed xerogels
title_fullStr Ecofriendly liquid phase oxidation with hydrogen peroxide of 2,6-dimethylphenol to 2,6-dimethyl-1,4-benzoquinone catalyzed by TiO2-CeO2 mixed xerogels
title_full_unstemmed Ecofriendly liquid phase oxidation with hydrogen peroxide of 2,6-dimethylphenol to 2,6-dimethyl-1,4-benzoquinone catalyzed by TiO2-CeO2 mixed xerogels
title_sort Ecofriendly liquid phase oxidation with hydrogen peroxide of 2,6-dimethylphenol to 2,6-dimethyl-1,4-benzoquinone catalyzed by TiO2-CeO2 mixed xerogels
dc.creator.none.fl_str_mv Palacio, Magdalena
Villabrille, Paula Isabel
Romanelli, Gustavo Pablo
Vazquez, Patricia Graciela
Caceres, Carmen Victoria
author Palacio, Magdalena
author_facet Palacio, Magdalena
Villabrille, Paula Isabel
Romanelli, Gustavo Pablo
Vazquez, Patricia Graciela
Caceres, Carmen Victoria
author_role author
author2 Villabrille, Paula Isabel
Romanelli, Gustavo Pablo
Vazquez, Patricia Graciela
Caceres, Carmen Victoria
author2_role author
author
author
author
dc.subject.none.fl_str_mv Titania/Ceria
Xerogel
Oxidation
Liquid Phase
topic Titania/Ceria
Xerogel
Oxidation
Liquid Phase
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Titania–ceria mixed xerogels were prepared with 10% (w/w) CeO2 and different pH values during the sol–gel process. The gels were dried in air and calcined at different temperature. Moreover, a sample without cerium, 100% (w/w) TiO2, was prepared to be kept as reference material. The prepared solids were characterized by means of XRD, SEM, DRS, FT-IR, TEM and EDX. Their textural properties were determined by adsorption–desorption isotherms of N2 at 77 K. The xerogels were tested as catalysts in the liquid phase oxidation of 2,6-dimethylphenol at 20 °C, using ethanol as solvent and aqueous hydrogen peroxide as a clean oxidizing agent. The 2,6-dimethyl-p-benzoquinone yield achieved was of 85–96% using the mixed xerogels as catalysts, and of 49% when the catalyst of titania without cerium was used. The best performance was achieved by the mixed xerogel synthesized at pH 4 and calcined at 200 °C; 100% of conversion of 2,6-dimethylphenol and 96% of yield in 2,6-dimethyl-p-benzoquinone were obtained in this case after 6 h of reaction. The reactions were again carried out with the catalyst recovered after its first use. Only a light yield decrease, lower than 2%, was observed. The use of an ethanol–water mixture as solvent (35:65% (v/v)) in the reaction was studied in order to make the reaction more environmentally friendly. Total conversion of the initial reactant, after 4 h of reaction at 20 °C, with 70% yield in 2,6-dimethyl-p-benzoquinone (2,6-DMBQ), was observed. Under these conditions a red by-product, insoluble in the reaction solution, was formed. This by-product was isolated and characterized and it was possible to identify it as 2,6-DMBQ dimmer (3,3′,5,5′-tetramethyl-4,4′-diphenoquinone). This by-product was observed in very few amounts when ethanol (96% (v/v)) was used as solvent.
Fil: Palacio, Magdalena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Villabrille, Paula Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Romanelli, Gustavo Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Vazquez, Patricia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Caceres, Carmen Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
description Titania–ceria mixed xerogels were prepared with 10% (w/w) CeO2 and different pH values during the sol–gel process. The gels were dried in air and calcined at different temperature. Moreover, a sample without cerium, 100% (w/w) TiO2, was prepared to be kept as reference material. The prepared solids were characterized by means of XRD, SEM, DRS, FT-IR, TEM and EDX. Their textural properties were determined by adsorption–desorption isotherms of N2 at 77 K. The xerogels were tested as catalysts in the liquid phase oxidation of 2,6-dimethylphenol at 20 °C, using ethanol as solvent and aqueous hydrogen peroxide as a clean oxidizing agent. The 2,6-dimethyl-p-benzoquinone yield achieved was of 85–96% using the mixed xerogels as catalysts, and of 49% when the catalyst of titania without cerium was used. The best performance was achieved by the mixed xerogel synthesized at pH 4 and calcined at 200 °C; 100% of conversion of 2,6-dimethylphenol and 96% of yield in 2,6-dimethyl-p-benzoquinone were obtained in this case after 6 h of reaction. The reactions were again carried out with the catalyst recovered after its first use. Only a light yield decrease, lower than 2%, was observed. The use of an ethanol–water mixture as solvent (35:65% (v/v)) in the reaction was studied in order to make the reaction more environmentally friendly. Total conversion of the initial reactant, after 4 h of reaction at 20 °C, with 70% yield in 2,6-dimethyl-p-benzoquinone (2,6-DMBQ), was observed. Under these conditions a red by-product, insoluble in the reaction solution, was formed. This by-product was isolated and characterized and it was possible to identify it as 2,6-DMBQ dimmer (3,3′,5,5′-tetramethyl-4,4′-diphenoquinone). This by-product was observed in very few amounts when ethanol (96% (v/v)) was used as solvent.
publishDate 2009
dc.date.none.fl_str_mv 2009-03-03
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/11336/31963
Caceres, Carmen Victoria; Vazquez, Patricia Graciela; Romanelli, Gustavo Pablo; Villabrille, Paula Isabel; Palacio, Magdalena; Ecofriendly liquid phase oxidation with hydrogen peroxide of 2,6-dimethylphenol to 2,6-dimethyl-1,4-benzoquinone catalyzed by TiO2-CeO2 mixed xerogels; Elsevier Science; Applied Catalysis A: General; 359; 1-2; 3-3-2009; 62-68
0926-860X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/31963
identifier_str_mv Caceres, Carmen Victoria; Vazquez, Patricia Graciela; Romanelli, Gustavo Pablo; Villabrille, Paula Isabel; Palacio, Magdalena; Ecofriendly liquid phase oxidation with hydrogen peroxide of 2,6-dimethylphenol to 2,6-dimethyl-1,4-benzoquinone catalyzed by TiO2-CeO2 mixed xerogels; Elsevier Science; Applied Catalysis A: General; 359; 1-2; 3-3-2009; 62-68
0926-860X
CONICET Digital
CONICET
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/S0926860X09001537
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apcata.2009.02.032
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
application/pdf
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
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