Sol-gel synthesis of TiO2 doped with chromium, characterization and studies of photocatalytic degradation of tartrazine under visible light

Autores
Cardozo, Ana Elizabeth; Farfan Torres, Elsa Monica; Morales, Graciela del Valle; Sham, Edgardo Ling
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Photocatalysis is an advanced oxidation method that allows the removal of aqueous pollutants of different origins. However, its application on an industrial scale is limited due to the requirement of excitation sources in UV frequency. For this reason, it is important to develop photocatalytic materials capable of working under visible radiation in photodegradation processes. This study analyzes the synthesis of TiO2 nanoparticles, using a new sol–gel route in a nonpolar dissolvent and its modification by doping with different chromium VI ion concentrations: 0.5, 1.0, and 1.5% w/w. A novel modification of this synthesis technique is reported, in which a nonpolar solvent, C6H12, is used to control the hydrolysis reactions of the titania precursor. Similarly, the use of ammonium chromate, (NH4)2CrO4, introduced by means of the impregnation-by-moisture-incipient technique, is proposed as a precursor of Cr dispersed in the TiO2 network, together with the study of the influence of chromium content on the photocatalytic activity of solids. The solids obtained by this technique were heat-treated at 400°C and characterized by Fourier Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy, Diffuse Reflectance Spectroscopy, X-Ray Diffraction (XRD), N2 Sorptometry, and Zeta Potential. Doping of titania with chromium stabilizes the crystalline phases of anatase and brookite. In addition, the introduction of chromium (VI) ions tends to reduce the average size of the particles, increasing the specific surface area and favoring the development of a mesoporous structure. It also decreases the forbidden band (Eg) and increases the absorption of radiation in the visible light range.
Fil: Cardozo, Ana Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
Fil: Farfan Torres, Elsa Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
Fil: Morales, Graciela del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
Fil: Sham, Edgardo Ling. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
Materia
TiO2
Cr VI
DOPING
PHOTOCATALYSIS
TARTRAZINE
SOL-GEL
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:11336/250799
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/250799
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Sol-gel synthesis of TiO2 doped with chromium, characterization and studies of photocatalytic degradation of tartrazine under visible lightCardozo, Ana ElizabethFarfan Torres, Elsa MonicaMorales, Graciela del ValleSham, Edgardo LingTiO2Cr VIDOPINGPHOTOCATALYSISTARTRAZINESOL-GELhttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Photocatalysis is an advanced oxidation method that allows the removal of aqueous pollutants of different origins. However, its application on an industrial scale is limited due to the requirement of excitation sources in UV frequency. For this reason, it is important to develop photocatalytic materials capable of working under visible radiation in photodegradation processes. This study analyzes the synthesis of TiO2 nanoparticles, using a new sol–gel route in a nonpolar dissolvent and its modification by doping with different chromium VI ion concentrations: 0.5, 1.0, and 1.5% w/w. A novel modification of this synthesis technique is reported, in which a nonpolar solvent, C6H12, is used to control the hydrolysis reactions of the titania precursor. Similarly, the use of ammonium chromate, (NH4)2CrO4, introduced by means of the impregnation-by-moisture-incipient technique, is proposed as a precursor of Cr dispersed in the TiO2 network, together with the study of the influence of chromium content on the photocatalytic activity of solids. The solids obtained by this technique were heat-treated at 400°C and characterized by Fourier Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy, Diffuse Reflectance Spectroscopy, X-Ray Diffraction (XRD), N2 Sorptometry, and Zeta Potential. Doping of titania with chromium stabilizes the crystalline phases of anatase and brookite. In addition, the introduction of chromium (VI) ions tends to reduce the average size of the particles, increasing the specific surface area and favoring the development of a mesoporous structure. It also decreases the forbidden band (Eg) and increases the absorption of radiation in the visible light range.Fil: Cardozo, Ana Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; ArgentinaFil: Farfan Torres, Elsa Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; ArgentinaFil: Morales, Graciela del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; ArgentinaFil: Sham, Edgardo Ling. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; ArgentinaAcademia.edu2023-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/250799Cardozo, Ana Elizabeth; Farfan Torres, Elsa Monica; Morales, Graciela del Valle; Sham, Edgardo Ling; Sol-gel synthesis of TiO2 doped with chromium, characterization and studies of photocatalytic degradation of tartrazine under visible light; Academia.edu; Academia Materials Science; 1; 1; 12-2023; 1-9CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.20935/AcadMatSci6142info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:01:03Zoai:ri.conicet.gov.ar:11336/250799instacron: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:34982025-09-03 10:01:03.581CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Sol-gel synthesis of TiO2 doped with chromium, characterization and studies of photocatalytic degradation of tartrazine under visible light
title Sol-gel synthesis of TiO2 doped with chromium, characterization and studies of photocatalytic degradation of tartrazine under visible light
spellingShingle Sol-gel synthesis of TiO2 doped with chromium, characterization and studies of photocatalytic degradation of tartrazine under visible light
Cardozo, Ana Elizabeth
TiO2
Cr VI
DOPING
PHOTOCATALYSIS
TARTRAZINE
SOL-GEL
title_short Sol-gel synthesis of TiO2 doped with chromium, characterization and studies of photocatalytic degradation of tartrazine under visible light
title_full Sol-gel synthesis of TiO2 doped with chromium, characterization and studies of photocatalytic degradation of tartrazine under visible light
title_fullStr Sol-gel synthesis of TiO2 doped with chromium, characterization and studies of photocatalytic degradation of tartrazine under visible light
title_full_unstemmed Sol-gel synthesis of TiO2 doped with chromium, characterization and studies of photocatalytic degradation of tartrazine under visible light
title_sort Sol-gel synthesis of TiO2 doped with chromium, characterization and studies of photocatalytic degradation of tartrazine under visible light
dc.creator.none.fl_str_mv Cardozo, Ana Elizabeth
Farfan Torres, Elsa Monica
Morales, Graciela del Valle
Sham, Edgardo Ling
author Cardozo, Ana Elizabeth
author_facet Cardozo, Ana Elizabeth
Farfan Torres, Elsa Monica
Morales, Graciela del Valle
Sham, Edgardo Ling
author_role author
author2 Farfan Torres, Elsa Monica
Morales, Graciela del Valle
Sham, Edgardo Ling
author2_role author
author
author
dc.subject.none.fl_str_mv TiO2
Cr VI
DOPING
PHOTOCATALYSIS
TARTRAZINE
SOL-GEL
topic TiO2
Cr VI
DOPING
PHOTOCATALYSIS
TARTRAZINE
SOL-GEL
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Photocatalysis is an advanced oxidation method that allows the removal of aqueous pollutants of different origins. However, its application on an industrial scale is limited due to the requirement of excitation sources in UV frequency. For this reason, it is important to develop photocatalytic materials capable of working under visible radiation in photodegradation processes. This study analyzes the synthesis of TiO2 nanoparticles, using a new sol–gel route in a nonpolar dissolvent and its modification by doping with different chromium VI ion concentrations: 0.5, 1.0, and 1.5% w/w. A novel modification of this synthesis technique is reported, in which a nonpolar solvent, C6H12, is used to control the hydrolysis reactions of the titania precursor. Similarly, the use of ammonium chromate, (NH4)2CrO4, introduced by means of the impregnation-by-moisture-incipient technique, is proposed as a precursor of Cr dispersed in the TiO2 network, together with the study of the influence of chromium content on the photocatalytic activity of solids. The solids obtained by this technique were heat-treated at 400°C and characterized by Fourier Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy, Diffuse Reflectance Spectroscopy, X-Ray Diffraction (XRD), N2 Sorptometry, and Zeta Potential. Doping of titania with chromium stabilizes the crystalline phases of anatase and brookite. In addition, the introduction of chromium (VI) ions tends to reduce the average size of the particles, increasing the specific surface area and favoring the development of a mesoporous structure. It also decreases the forbidden band (Eg) and increases the absorption of radiation in the visible light range.
Fil: Cardozo, Ana Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
Fil: Farfan Torres, Elsa Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
Fil: Morales, Graciela del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
Fil: Sham, Edgardo Ling. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
description Photocatalysis is an advanced oxidation method that allows the removal of aqueous pollutants of different origins. However, its application on an industrial scale is limited due to the requirement of excitation sources in UV frequency. For this reason, it is important to develop photocatalytic materials capable of working under visible radiation in photodegradation processes. This study analyzes the synthesis of TiO2 nanoparticles, using a new sol–gel route in a nonpolar dissolvent and its modification by doping with different chromium VI ion concentrations: 0.5, 1.0, and 1.5% w/w. A novel modification of this synthesis technique is reported, in which a nonpolar solvent, C6H12, is used to control the hydrolysis reactions of the titania precursor. Similarly, the use of ammonium chromate, (NH4)2CrO4, introduced by means of the impregnation-by-moisture-incipient technique, is proposed as a precursor of Cr dispersed in the TiO2 network, together with the study of the influence of chromium content on the photocatalytic activity of solids. The solids obtained by this technique were heat-treated at 400°C and characterized by Fourier Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy, Diffuse Reflectance Spectroscopy, X-Ray Diffraction (XRD), N2 Sorptometry, and Zeta Potential. Doping of titania with chromium stabilizes the crystalline phases of anatase and brookite. In addition, the introduction of chromium (VI) ions tends to reduce the average size of the particles, increasing the specific surface area and favoring the development of a mesoporous structure. It also decreases the forbidden band (Eg) and increases the absorption of radiation in the visible light range.
publishDate 2023
dc.date.none.fl_str_mv 2023-12
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/11336/250799
Cardozo, Ana Elizabeth; Farfan Torres, Elsa Monica; Morales, Graciela del Valle; Sham, Edgardo Ling; Sol-gel synthesis of TiO2 doped with chromium, characterization and studies of photocatalytic degradation of tartrazine under visible light; Academia.edu; Academia Materials Science; 1; 1; 12-2023; 1-9
CONICET Digital
CONICET
url http://hdl.handle.net/11336/250799
identifier_str_mv Cardozo, Ana Elizabeth; Farfan Torres, Elsa Monica; Morales, Graciela del Valle; Sham, Edgardo Ling; Sol-gel synthesis of TiO2 doped with chromium, characterization and studies of photocatalytic degradation of tartrazine under visible light; Academia.edu; Academia Materials Science; 1; 1; 12-2023; 1-9
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.20935/AcadMatSci6142
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 Academia.edu
publisher.none.fl_str_mv Academia.edu
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 13.13397

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