Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation

Autores
Vera, Maria Laura; Traid, Hernán Darío; Henrikson, Edgard Rubén; Ares, Alicia Esther; Litter, Marta Irene
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Nanotubular TiO2 coatings prepared by anodic oxidation of titanium were evaluated for the first time in the photocatalytic Cr(VI) reduction in the presence of EDTA. Small nanotubes (SN) were prepared by using aqueous hydrofluoric acid as electrolyte, and long nanotubes (LN) were made by using an ethylene glycol solution containing ammonium fluoride and water. The samples were characterized by scanning electron microscopy, X-ray diffraction and UV–Vis diffuse reflectance spectroscopy. The photocatalytic reactions were performed using [Cr(VI)]0 = 0.8 mM, an EDTA/Cr(VI) molar ratio = 1.25 and pH 2. The photocatalytic activity increased with the applied voltage due to an increase of the average diameter, wall thickness and length of the nanotubes. The most active SN coating yielded 98% of Cr(VI) transformation after 300 min, while all LN samples achieved a complete transformation in the same time or less. The photocatalytic activity was in almost cases higher than that of a P25 supported sample.
Fil: Vera, Maria Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas Químicas y Naturales. Instituto de Materiales de Misiones; Argentina
Fil: Traid, Hernán Darío. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas Químicas y Naturales. Instituto de Materiales de Misiones; Argentina
Fil: Henrikson, Edgard Rubén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas Químicas y Naturales. Instituto de Materiales de Misiones; Argentina
Fil: Ares, Alicia Esther. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas Químicas y Naturales. Instituto de Materiales de Misiones; Argentina
Fil: Litter, Marta Irene. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina
Materia
ANODIC OXIDATION
HETEROGENEOUS PHOTOCATALYSIS
HEXAVALENT CHROMIUM
TIO2 NANOTUBES
Nivel de accesibilidad
acceso embargado
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:11336/38482
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/38482
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidationVera, Maria LauraTraid, Hernán DaríoHenrikson, Edgard RubénAres, Alicia EstherLitter, Marta IreneANODIC OXIDATIONHETEROGENEOUS PHOTOCATALYSISHEXAVALENT CHROMIUMTIO2 NANOTUBEShttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Nanotubular TiO2 coatings prepared by anodic oxidation of titanium were evaluated for the first time in the photocatalytic Cr(VI) reduction in the presence of EDTA. Small nanotubes (SN) were prepared by using aqueous hydrofluoric acid as electrolyte, and long nanotubes (LN) were made by using an ethylene glycol solution containing ammonium fluoride and water. The samples were characterized by scanning electron microscopy, X-ray diffraction and UV–Vis diffuse reflectance spectroscopy. The photocatalytic reactions were performed using [Cr(VI)]0 = 0.8 mM, an EDTA/Cr(VI) molar ratio = 1.25 and pH 2. The photocatalytic activity increased with the applied voltage due to an increase of the average diameter, wall thickness and length of the nanotubes. The most active SN coating yielded 98% of Cr(VI) transformation after 300 min, while all LN samples achieved a complete transformation in the same time or less. The photocatalytic activity was in almost cases higher than that of a P25 supported sample.Fil: Vera, Maria Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas Químicas y Naturales. Instituto de Materiales de Misiones; ArgentinaFil: Traid, Hernán Darío. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas Químicas y Naturales. Instituto de Materiales de Misiones; ArgentinaFil: Henrikson, Edgard Rubén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas Químicas y Naturales. Instituto de Materiales de Misiones; ArgentinaFil: Ares, Alicia Esther. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas Químicas y Naturales. Instituto de Materiales de Misiones; ArgentinaFil: Litter, Marta Irene. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); ArgentinaPergamon-Elsevier Science Ltd2018-01info:eu-repo/date/embargoEnd/2018-08-01info: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/11336/38482Vera, Maria Laura; Traid, Hernán Darío; Henrikson, Edgard Rubén; Ares, Alicia Esther; Litter, Marta Irene; Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation; Pergamon-Elsevier Science Ltd; Materials Research Bulletin; 97; 1-2018; 150-1570025-5408CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.materresbull.2017.08.013info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0025540817300892info:eu-repo/semantics/embargoedAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:59:19Zoai:ri.conicet.gov.ar:11336/38482instacron: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 09:59:19.932CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation
title Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation
spellingShingle Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation
Vera, Maria Laura
ANODIC OXIDATION
HETEROGENEOUS PHOTOCATALYSIS
HEXAVALENT CHROMIUM
TIO2 NANOTUBES
title_short Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation
title_full Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation
title_fullStr Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation
title_full_unstemmed Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation
title_sort Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation
dc.creator.none.fl_str_mv Vera, Maria Laura
Traid, Hernán Darío
Henrikson, Edgard Rubén
Ares, Alicia Esther
Litter, Marta Irene
author Vera, Maria Laura
author_facet Vera, Maria Laura
Traid, Hernán Darío
Henrikson, Edgard Rubén
Ares, Alicia Esther
Litter, Marta Irene
author_role author
author2 Traid, Hernán Darío
Henrikson, Edgard Rubén
Ares, Alicia Esther
Litter, Marta Irene
author2_role author
author
author
author
dc.subject.none.fl_str_mv ANODIC OXIDATION
HETEROGENEOUS PHOTOCATALYSIS
HEXAVALENT CHROMIUM
TIO2 NANOTUBES
topic ANODIC OXIDATION
HETEROGENEOUS PHOTOCATALYSIS
HEXAVALENT CHROMIUM
TIO2 NANOTUBES
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Nanotubular TiO2 coatings prepared by anodic oxidation of titanium were evaluated for the first time in the photocatalytic Cr(VI) reduction in the presence of EDTA. Small nanotubes (SN) were prepared by using aqueous hydrofluoric acid as electrolyte, and long nanotubes (LN) were made by using an ethylene glycol solution containing ammonium fluoride and water. The samples were characterized by scanning electron microscopy, X-ray diffraction and UV–Vis diffuse reflectance spectroscopy. The photocatalytic reactions were performed using [Cr(VI)]0 = 0.8 mM, an EDTA/Cr(VI) molar ratio = 1.25 and pH 2. The photocatalytic activity increased with the applied voltage due to an increase of the average diameter, wall thickness and length of the nanotubes. The most active SN coating yielded 98% of Cr(VI) transformation after 300 min, while all LN samples achieved a complete transformation in the same time or less. The photocatalytic activity was in almost cases higher than that of a P25 supported sample.
Fil: Vera, Maria Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas Químicas y Naturales. Instituto de Materiales de Misiones; Argentina
Fil: Traid, Hernán Darío. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas Químicas y Naturales. Instituto de Materiales de Misiones; Argentina
Fil: Henrikson, Edgard Rubén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas Químicas y Naturales. Instituto de Materiales de Misiones; Argentina
Fil: Ares, Alicia Esther. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Materiales de Misiones. Universidad Nacional de Misiones. Facultad de Ciencias Exactas Químicas y Naturales. Instituto de Materiales de Misiones; Argentina
Fil: Litter, Marta Irene. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina
description Nanotubular TiO2 coatings prepared by anodic oxidation of titanium were evaluated for the first time in the photocatalytic Cr(VI) reduction in the presence of EDTA. Small nanotubes (SN) were prepared by using aqueous hydrofluoric acid as electrolyte, and long nanotubes (LN) were made by using an ethylene glycol solution containing ammonium fluoride and water. The samples were characterized by scanning electron microscopy, X-ray diffraction and UV–Vis diffuse reflectance spectroscopy. The photocatalytic reactions were performed using [Cr(VI)]0 = 0.8 mM, an EDTA/Cr(VI) molar ratio = 1.25 and pH 2. The photocatalytic activity increased with the applied voltage due to an increase of the average diameter, wall thickness and length of the nanotubes. The most active SN coating yielded 98% of Cr(VI) transformation after 300 min, while all LN samples achieved a complete transformation in the same time or less. The photocatalytic activity was in almost cases higher than that of a P25 supported sample.
publishDate 2018
dc.date.none.fl_str_mv 2018-01
info:eu-repo/date/embargoEnd/2018-08-01
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/11336/38482
Vera, Maria Laura; Traid, Hernán Darío; Henrikson, Edgard Rubén; Ares, Alicia Esther; Litter, Marta Irene; Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation; Pergamon-Elsevier Science Ltd; Materials Research Bulletin; 97; 1-2018; 150-157
0025-5408
CONICET Digital
CONICET
url http://hdl.handle.net/11336/38482
identifier_str_mv Vera, Maria Laura; Traid, Hernán Darío; Henrikson, Edgard Rubén; Ares, Alicia Esther; Litter, Marta Irene; Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation; Pergamon-Elsevier Science Ltd; Materials Research Bulletin; 97; 1-2018; 150-157
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/doi/10.1016/j.materresbull.2017.08.013
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0025540817300892
dc.rights.none.fl_str_mv info:eu-repo/semantics/embargoedAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv embargoedAccess
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
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
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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