Visible-light-absorbing mesoporous TiO2 modified with tungstosilicic acid as photocatalyst in the photodegradation of 4-chlorophenol

Autores
Rengifo Herrera, Julian Andres; Frenzel, Romina Alejandra; Blanco, Mirta Noemi; Pizzio, Luis Rene
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Visible-light-absorbing materials based on TiO2 modified with tungstosilicic acid (TSA; H4SiW12O40) were prepared using titanium isopropoxide as precursor and urea as a low-cost pore-forming agent. X-ray diffraction (XRD) measurements show evidence about the presence of anatase TiO2 in all samples and shifting of the anatase–rutile transition temperature toward temperatures higher than 600 °C. The FT-IR and FT-Raman studies showed that the main heteropolyoxometallate species present in the composites annealed up to 500 °C is the [SiW12O40]4− anion, which exhibited a strong interaction with TiO2 surface probably due to the formation of TSA–TiO2 complexes that should be responsible for its visible light absorption. The photocatalytic activity of these materials was tested using 4-chlorophenol as model pollutant. Results revealed that photocatalytic activity mainly depends on the TSA amount and the annealing temperature. The amount of degraded 4-CP increased with the increment of TSA content, with the one calcined at 600 °C being more active. Finally, it was found that these photocatalysts can be reused at least three times without an important decrease in the degradation and mineralization degrees.
Fil: Rengifo Herrera, Julian Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Frenzel, Romina Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Blanco, Mirta Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Pizzio, Luis Rene. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Materia
Mesoporous Titania
Tungstosilicic Acid
4-Chlorophenol
Photocatalytic Degradation
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:11336/24971
Acceder
id CONICETDig_1175382e7b1c45d9491784e221d9f52f
oai_identifier_str oai:ri.conicet.gov.ar:11336/24971
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Visible-light-absorbing mesoporous TiO2 modified with tungstosilicic acid as photocatalyst in the photodegradation of 4-chlorophenolRengifo Herrera, Julian AndresFrenzel, Romina AlejandraBlanco, Mirta NoemiPizzio, Luis ReneMesoporous TitaniaTungstosilicic Acid4-ChlorophenolPhotocatalytic Degradationhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Visible-light-absorbing materials based on TiO2 modified with tungstosilicic acid (TSA; H4SiW12O40) were prepared using titanium isopropoxide as precursor and urea as a low-cost pore-forming agent. X-ray diffraction (XRD) measurements show evidence about the presence of anatase TiO2 in all samples and shifting of the anatase–rutile transition temperature toward temperatures higher than 600 °C. The FT-IR and FT-Raman studies showed that the main heteropolyoxometallate species present in the composites annealed up to 500 °C is the [SiW12O40]4− anion, which exhibited a strong interaction with TiO2 surface probably due to the formation of TSA–TiO2 complexes that should be responsible for its visible light absorption. The photocatalytic activity of these materials was tested using 4-chlorophenol as model pollutant. Results revealed that photocatalytic activity mainly depends on the TSA amount and the annealing temperature. The amount of degraded 4-CP increased with the increment of TSA content, with the one calcined at 600 °C being more active. Finally, it was found that these photocatalysts can be reused at least three times without an important decrease in the degradation and mineralization degrees.Fil: Rengifo Herrera, Julian Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaFil: Frenzel, Romina Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaFil: Blanco, Mirta Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaFil: Pizzio, Luis Rene. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaElsevier Science Sa2014-06-02info: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/11336/24971Rengifo Herrera, Julian Andres; Frenzel, Romina Alejandra; Blanco, Mirta Noemi; Pizzio, Luis Rene; Visible-light-absorbing mesoporous TiO2 modified with tungstosilicic acid as photocatalyst in the photodegradation of 4-chlorophenol; Elsevier Science Sa; Journal of Photochemistry and Photobiology A: Chemistry; 289; 2-6-2014; 22-301010-6030CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1010603014002342info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jphotochem.2014.05.014info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:19:32Zoai:ri.conicet.gov.ar:11336/24971instacron: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 10:19:32.333CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Visible-light-absorbing mesoporous TiO2 modified with tungstosilicic acid as photocatalyst in the photodegradation of 4-chlorophenol
title Visible-light-absorbing mesoporous TiO2 modified with tungstosilicic acid as photocatalyst in the photodegradation of 4-chlorophenol
spellingShingle Visible-light-absorbing mesoporous TiO2 modified with tungstosilicic acid as photocatalyst in the photodegradation of 4-chlorophenol
Rengifo Herrera, Julian Andres
Mesoporous Titania
Tungstosilicic Acid
4-Chlorophenol
Photocatalytic Degradation
title_short Visible-light-absorbing mesoporous TiO2 modified with tungstosilicic acid as photocatalyst in the photodegradation of 4-chlorophenol
title_full Visible-light-absorbing mesoporous TiO2 modified with tungstosilicic acid as photocatalyst in the photodegradation of 4-chlorophenol
title_fullStr Visible-light-absorbing mesoporous TiO2 modified with tungstosilicic acid as photocatalyst in the photodegradation of 4-chlorophenol
title_full_unstemmed Visible-light-absorbing mesoporous TiO2 modified with tungstosilicic acid as photocatalyst in the photodegradation of 4-chlorophenol
title_sort Visible-light-absorbing mesoporous TiO2 modified with tungstosilicic acid as photocatalyst in the photodegradation of 4-chlorophenol
dc.creator.none.fl_str_mv Rengifo Herrera, Julian Andres
Frenzel, Romina Alejandra
Blanco, Mirta Noemi
Pizzio, Luis Rene
author Rengifo Herrera, Julian Andres
author_facet Rengifo Herrera, Julian Andres
Frenzel, Romina Alejandra
Blanco, Mirta Noemi
Pizzio, Luis Rene
author_role author
author2 Frenzel, Romina Alejandra
Blanco, Mirta Noemi
Pizzio, Luis Rene
author2_role author
author
author
dc.subject.none.fl_str_mv Mesoporous Titania
Tungstosilicic Acid
4-Chlorophenol
Photocatalytic Degradation
topic Mesoporous Titania
Tungstosilicic Acid
4-Chlorophenol
Photocatalytic Degradation
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Visible-light-absorbing materials based on TiO2 modified with tungstosilicic acid (TSA; H4SiW12O40) were prepared using titanium isopropoxide as precursor and urea as a low-cost pore-forming agent. X-ray diffraction (XRD) measurements show evidence about the presence of anatase TiO2 in all samples and shifting of the anatase–rutile transition temperature toward temperatures higher than 600 °C. The FT-IR and FT-Raman studies showed that the main heteropolyoxometallate species present in the composites annealed up to 500 °C is the [SiW12O40]4− anion, which exhibited a strong interaction with TiO2 surface probably due to the formation of TSA–TiO2 complexes that should be responsible for its visible light absorption. The photocatalytic activity of these materials was tested using 4-chlorophenol as model pollutant. Results revealed that photocatalytic activity mainly depends on the TSA amount and the annealing temperature. The amount of degraded 4-CP increased with the increment of TSA content, with the one calcined at 600 °C being more active. Finally, it was found that these photocatalysts can be reused at least three times without an important decrease in the degradation and mineralization degrees.
Fil: Rengifo Herrera, Julian Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Frenzel, Romina Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Blanco, Mirta Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Pizzio, Luis Rene. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
description Visible-light-absorbing materials based on TiO2 modified with tungstosilicic acid (TSA; H4SiW12O40) were prepared using titanium isopropoxide as precursor and urea as a low-cost pore-forming agent. X-ray diffraction (XRD) measurements show evidence about the presence of anatase TiO2 in all samples and shifting of the anatase–rutile transition temperature toward temperatures higher than 600 °C. The FT-IR and FT-Raman studies showed that the main heteropolyoxometallate species present in the composites annealed up to 500 °C is the [SiW12O40]4− anion, which exhibited a strong interaction with TiO2 surface probably due to the formation of TSA–TiO2 complexes that should be responsible for its visible light absorption. The photocatalytic activity of these materials was tested using 4-chlorophenol as model pollutant. Results revealed that photocatalytic activity mainly depends on the TSA amount and the annealing temperature. The amount of degraded 4-CP increased with the increment of TSA content, with the one calcined at 600 °C being more active. Finally, it was found that these photocatalysts can be reused at least three times without an important decrease in the degradation and mineralization degrees.
publishDate 2014
dc.date.none.fl_str_mv 2014-06-02
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/11336/24971
Rengifo Herrera, Julian Andres; Frenzel, Romina Alejandra; Blanco, Mirta Noemi; Pizzio, Luis Rene; Visible-light-absorbing mesoporous TiO2 modified with tungstosilicic acid as photocatalyst in the photodegradation of 4-chlorophenol; Elsevier Science Sa; Journal of Photochemistry and Photobiology A: Chemistry; 289; 2-6-2014; 22-30
1010-6030
CONICET Digital
CONICET
url http://hdl.handle.net/11336/24971
identifier_str_mv Rengifo Herrera, Julian Andres; Frenzel, Romina Alejandra; Blanco, Mirta Noemi; Pizzio, Luis Rene; Visible-light-absorbing mesoporous TiO2 modified with tungstosilicic acid as photocatalyst in the photodegradation of 4-chlorophenol; Elsevier Science Sa; Journal of Photochemistry and Photobiology A: Chemistry; 289; 2-6-2014; 22-30
1010-6030
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/S1010603014002342
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jphotochem.2014.05.014
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 Sa
publisher.none.fl_str_mv Elsevier Science Sa
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_ 1844614167459266560
score 13.069144

Publicaciones similares