Visible light absorption of TiO2 materials impregnated with tungstophosphoric acid ethanol–aqueous solution at different pH values. Evidence about the formation of a surface comple...

Autores
Rengifo Herrera, Julian Andres; Blanco, Mirta Noemi; Pizzio, Luis Rene
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
TiO2 particles prepared by the sol-gel method were impregnated at different pH values (1.0, 2.0, 5.0 and 10.0) with a water-ethanol solution (50% V/V) of tungstophosphoric acid (TPA) (0.012 M). Similar preparation was carried out to synthesize TiO2 impregnated with [WO4] 2- (TiW). These materials were characterized by different techniques such as UV-vis diffuse reflectance spectroscopy (UV-vis DRS), magic angle spinning nuclear magnetic resonance of 31P (31P MAS NMR), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Fourier transform Raman spectroscopy (FT-Raman). Results revealed that TPA-TiO2 materials exhibit visible light absorption only when impregnation was done at pH 1.0 (TiTPA1) and 2.0 (TiTPA2). TiW powder did not show visible light absorption. XRD patterns show the presence of peaks at 2θ = 25.4 (1 0 1), 37.9 (0 0 4), 47.8 (2 0 0) and 54.3 associated to the anatase phase. Solid NMR, FT-IR and FT-Raman characterization showed that TiTPA1 and TiTPA2 samples contain Keggin ([PW12O40] 3-) and lacunary anions ([PW11O39] 7-) respectively. On the other hand, FT-Raman results revealed a blue shifting and broadening of the band at 141 cm-1 corresponding to anatase TiO2 and moreover, a broadening of bands at 900-1100 cm -1 attributed to Keggin structures of TPA. Both spectral changes could be related to the formation of a surface complex between the Keggin anion of TPA and TiO2 surfaces. This interaction should be responsible for visible light absorption
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: 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
Composites
Nanostructures
Semiconductors
Optical Properties
Raman Spectroscopy
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:11336/29095
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/29095
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Visible light absorption of TiO2 materials impregnated with tungstophosphoric acid ethanol–aqueous solution at different pH values. Evidence about the formation of a surface complex between Keggin anion and TiO2 surfacesRengifo Herrera, Julian AndresBlanco, Mirta NoemiPizzio, Luis ReneCompositesNanostructuresSemiconductorsOptical PropertiesRaman Spectroscopyhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1TiO2 particles prepared by the sol-gel method were impregnated at different pH values (1.0, 2.0, 5.0 and 10.0) with a water-ethanol solution (50% V/V) of tungstophosphoric acid (TPA) (0.012 M). Similar preparation was carried out to synthesize TiO2 impregnated with [WO4] 2- (TiW). These materials were characterized by different techniques such as UV-vis diffuse reflectance spectroscopy (UV-vis DRS), magic angle spinning nuclear magnetic resonance of 31P (31P MAS NMR), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Fourier transform Raman spectroscopy (FT-Raman). Results revealed that TPA-TiO2 materials exhibit visible light absorption only when impregnation was done at pH 1.0 (TiTPA1) and 2.0 (TiTPA2). TiW powder did not show visible light absorption. XRD patterns show the presence of peaks at 2θ = 25.4 (1 0 1), 37.9 (0 0 4), 47.8 (2 0 0) and 54.3 associated to the anatase phase. Solid NMR, FT-IR and FT-Raman characterization showed that TiTPA1 and TiTPA2 samples contain Keggin ([PW12O40] 3-) and lacunary anions ([PW11O39] 7-) respectively. On the other hand, FT-Raman results revealed a blue shifting and broadening of the band at 141 cm-1 corresponding to anatase TiO2 and moreover, a broadening of bands at 900-1100 cm -1 attributed to Keggin structures of TPA. Both spectral changes could be related to the formation of a surface complex between the Keggin anion of TPA and TiO2 surfaces. This interaction should be responsible for visible light absorptionFil: 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: 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; ArgentinaElsevier2013-10-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/29095Rengifo Herrera, Julian Andres; Blanco, Mirta Noemi; Pizzio, Luis Rene; Visible light absorption of TiO2 materials impregnated with tungstophosphoric acid ethanol–aqueous solution at different pH values. Evidence about the formation of a surface complex between Keggin anion and TiO2 surfaces; Elsevier; Materials Research Bulletin; 49; 8-10-2013; 618-6240025-5408CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0025540813008192info:eu-repo/semantics/altIdentifier/doi/10.1016/j.materresbull.2013.09.043info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:46:28Zoai:ri.conicet.gov.ar:11336/29095instacron: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 09:46:28.884CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Visible light absorption of TiO2 materials impregnated with tungstophosphoric acid ethanol–aqueous solution at different pH values. Evidence about the formation of a surface complex between Keggin anion and TiO2 surfaces
title Visible light absorption of TiO2 materials impregnated with tungstophosphoric acid ethanol–aqueous solution at different pH values. Evidence about the formation of a surface complex between Keggin anion and TiO2 surfaces
spellingShingle Visible light absorption of TiO2 materials impregnated with tungstophosphoric acid ethanol–aqueous solution at different pH values. Evidence about the formation of a surface complex between Keggin anion and TiO2 surfaces
Rengifo Herrera, Julian Andres
Composites
Nanostructures
Semiconductors
Optical Properties
Raman Spectroscopy
title_short Visible light absorption of TiO2 materials impregnated with tungstophosphoric acid ethanol–aqueous solution at different pH values. Evidence about the formation of a surface complex between Keggin anion and TiO2 surfaces
title_full Visible light absorption of TiO2 materials impregnated with tungstophosphoric acid ethanol–aqueous solution at different pH values. Evidence about the formation of a surface complex between Keggin anion and TiO2 surfaces
title_fullStr Visible light absorption of TiO2 materials impregnated with tungstophosphoric acid ethanol–aqueous solution at different pH values. Evidence about the formation of a surface complex between Keggin anion and TiO2 surfaces
title_full_unstemmed Visible light absorption of TiO2 materials impregnated with tungstophosphoric acid ethanol–aqueous solution at different pH values. Evidence about the formation of a surface complex between Keggin anion and TiO2 surfaces
title_sort Visible light absorption of TiO2 materials impregnated with tungstophosphoric acid ethanol–aqueous solution at different pH values. Evidence about the formation of a surface complex between Keggin anion and TiO2 surfaces
dc.creator.none.fl_str_mv Rengifo Herrera, Julian Andres
Blanco, Mirta Noemi
Pizzio, Luis Rene
author Rengifo Herrera, Julian Andres
author_facet Rengifo Herrera, Julian Andres
Blanco, Mirta Noemi
Pizzio, Luis Rene
author_role author
author2 Blanco, Mirta Noemi
Pizzio, Luis Rene
author2_role author
author
dc.subject.none.fl_str_mv Composites
Nanostructures
Semiconductors
Optical Properties
Raman Spectroscopy
topic Composites
Nanostructures
Semiconductors
Optical Properties
Raman Spectroscopy
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv TiO2 particles prepared by the sol-gel method were impregnated at different pH values (1.0, 2.0, 5.0 and 10.0) with a water-ethanol solution (50% V/V) of tungstophosphoric acid (TPA) (0.012 M). Similar preparation was carried out to synthesize TiO2 impregnated with [WO4] 2- (TiW). These materials were characterized by different techniques such as UV-vis diffuse reflectance spectroscopy (UV-vis DRS), magic angle spinning nuclear magnetic resonance of 31P (31P MAS NMR), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Fourier transform Raman spectroscopy (FT-Raman). Results revealed that TPA-TiO2 materials exhibit visible light absorption only when impregnation was done at pH 1.0 (TiTPA1) and 2.0 (TiTPA2). TiW powder did not show visible light absorption. XRD patterns show the presence of peaks at 2θ = 25.4 (1 0 1), 37.9 (0 0 4), 47.8 (2 0 0) and 54.3 associated to the anatase phase. Solid NMR, FT-IR and FT-Raman characterization showed that TiTPA1 and TiTPA2 samples contain Keggin ([PW12O40] 3-) and lacunary anions ([PW11O39] 7-) respectively. On the other hand, FT-Raman results revealed a blue shifting and broadening of the band at 141 cm-1 corresponding to anatase TiO2 and moreover, a broadening of bands at 900-1100 cm -1 attributed to Keggin structures of TPA. Both spectral changes could be related to the formation of a surface complex between the Keggin anion of TPA and TiO2 surfaces. This interaction should be responsible for visible light absorption
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: 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 TiO2 particles prepared by the sol-gel method were impregnated at different pH values (1.0, 2.0, 5.0 and 10.0) with a water-ethanol solution (50% V/V) of tungstophosphoric acid (TPA) (0.012 M). Similar preparation was carried out to synthesize TiO2 impregnated with [WO4] 2- (TiW). These materials were characterized by different techniques such as UV-vis diffuse reflectance spectroscopy (UV-vis DRS), magic angle spinning nuclear magnetic resonance of 31P (31P MAS NMR), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Fourier transform Raman spectroscopy (FT-Raman). Results revealed that TPA-TiO2 materials exhibit visible light absorption only when impregnation was done at pH 1.0 (TiTPA1) and 2.0 (TiTPA2). TiW powder did not show visible light absorption. XRD patterns show the presence of peaks at 2θ = 25.4 (1 0 1), 37.9 (0 0 4), 47.8 (2 0 0) and 54.3 associated to the anatase phase. Solid NMR, FT-IR and FT-Raman characterization showed that TiTPA1 and TiTPA2 samples contain Keggin ([PW12O40] 3-) and lacunary anions ([PW11O39] 7-) respectively. On the other hand, FT-Raman results revealed a blue shifting and broadening of the band at 141 cm-1 corresponding to anatase TiO2 and moreover, a broadening of bands at 900-1100 cm -1 attributed to Keggin structures of TPA. Both spectral changes could be related to the formation of a surface complex between the Keggin anion of TPA and TiO2 surfaces. This interaction should be responsible for visible light absorption
publishDate 2013
dc.date.none.fl_str_mv 2013-10-08
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/11336/29095
Rengifo Herrera, Julian Andres; Blanco, Mirta Noemi; Pizzio, Luis Rene; Visible light absorption of TiO2 materials impregnated with tungstophosphoric acid ethanol–aqueous solution at different pH values. Evidence about the formation of a surface complex between Keggin anion and TiO2 surfaces; Elsevier; Materials Research Bulletin; 49; 8-10-2013; 618-624
0025-5408
CONICET Digital
CONICET
url http://hdl.handle.net/11336/29095
identifier_str_mv Rengifo Herrera, Julian Andres; Blanco, Mirta Noemi; Pizzio, Luis Rene; Visible light absorption of TiO2 materials impregnated with tungstophosphoric acid ethanol–aqueous solution at different pH values. Evidence about the formation of a surface complex between Keggin anion and TiO2 surfaces; Elsevier; Materials Research Bulletin; 49; 8-10-2013; 618-624
0025-5408
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/S0025540813008192
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.materresbull.2013.09.043
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
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
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score 13.070432

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