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

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Fil: Vera, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico (Nordeste). Instituto de Materiales de Misiones; Argentina.

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Autores principales: Vera, María Laura, Traid, Hernán Darío, Henrikson, Edgard Rubén, Ares, Alicia Esther, Litter, Marta Irene
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: Elsevier 2018
Materias:
TiO2 nanotubes
Anodic oxidation
Hexavalent chromium
Heterogeneous photocatalysis
Acceso en línea:https://hdl.handle.net/20.500.12219/4326
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Repositorio Institucional Digital de la UNaM (RIDUNAM) de Universidad Nacional de Misiones
id I77-R195-20.500.12219-4326
record_format dspace
spelling I77-R195-20.500.12219-43262024-06-03T13:00:35Z Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation Vera, María Laura Traid, Hernán Darío Henrikson, Edgard Rubén Ares, Alicia Esther Litter, Marta Irene TiO2 nanotubes Anodic oxidation Hexavalent chromium Heterogeneous photocatalysis Fil: Vera, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico (Nordeste). Instituto de Materiales de Misiones; Argentina. Fil: Vera, María Laura. 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 (Nordeste). Instituto de Materiales de Misiones; Argentina. Fil: Traid, Hernán Darío. 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 (Nordeste). Instituto de Materiales de Misiones; Argentina. Fil: Henrikson, Edgard Rubén. 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 (Nordeste). Instituto de Materiales de Misiones; Argentina. Fil: Ares, Alicia Esther. Universidad Nacional de Misiones. Facultad de Ciencias Exactas, Químicas y Naturales. Instituto de Materiales de Misiones; Argentina. Fil: Litter, Marta Irene. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fil: Litter, Marta Irene. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Gerencia Química; Argentina. Fil: Litter, Marta Irene. Universidad Nacional de General San Martín. Instituto de Investigación e Ingeniería Ambiental; Argentina. 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. 2018-01-01 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://hdl.handle.net/20.500.12219/4326 eng info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0025540817300892?via%3Dihub info:eu-repo/semantics/openAccess application/pdf application/pdf 2.121 MB Elsevier
institution Universidad Nacional de Misiones
institution_str I-77
repository_str R-195
collection Repositorio Institucional Digital de la UNaM (RIDUNAM)
language Inglés
topic TiO2 nanotubes
Anodic oxidation
Hexavalent chromium
Heterogeneous photocatalysis
spellingShingle TiO2 nanotubes
Anodic oxidation
Hexavalent chromium
Heterogeneous photocatalysis
Vera, María 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
topic_facet TiO2 nanotubes
Anodic oxidation
Hexavalent chromium
Heterogeneous photocatalysis
description Fil: Vera, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico (Nordeste). Instituto de Materiales de Misiones; Argentina.
format Artículo
Artículo
publishedVersion
author Vera, María Laura
Traid, Hernán Darío
Henrikson, Edgard Rubén
Ares, Alicia Esther
Litter, Marta Irene
author_facet Vera, María Laura
Traid, Hernán Darío
Henrikson, Edgard Rubén
Ares, Alicia Esther
Litter, Marta Irene
author_sort Vera, María Laura
title Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation
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
publisher Elsevier
publishDate 2018
url https://hdl.handle.net/20.500.12219/4326
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