Influence of anodizing variables on Cr (VI) photocatalytic reduction using TiO2 nanotubes obtained by anodic oxidation

Influence of anodizing variables on Cr (VI) photocatalytic reduction using TiO2 nanotubes obtained by anodic oxidation

Fil: Dwojak, Anabela Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Materiales de Misiones; Argentina.

Bibliographic Details
Main Authors: Dwojak, Anabela Natalia, Vera, María Laura, Traid, Hernán Darío, Maydana, María F., Litter, Marta Irene, Schvezov, Carlos Enrique
Format: info:eu-repo/semantics/article
Language:English
Published: Elsevier Science 2017
Subjects:
Nanostructures
Surfaces
Photocatalytic properties
Anodic oxidation
Hexavalent chromium reduction
Online Access:https://hdl.handle.net/20.500.12219/5086
id ir-20.500.12219-5086
record_format dspace
spelling ir-20.500.12219-50862023-09-05T12:17:41Z Influence of anodizing variables on Cr (VI) photocatalytic reduction using TiO2 nanotubes obtained by anodic oxidation Dwojak, Anabela Natalia Vera, María Laura Traid, Hernán Darío Maydana, María F. Litter, Marta Irene Schvezov, Carlos Enrique Nanostructures Surfaces Photocatalytic properties Anodic oxidation Hexavalent chromium reduction Fil: Dwojak, Anabela Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Materiales de Misiones; Argentina. Fil: Dwojak, Anabela Natalia. Universidad Nacional de Misiones. Instituto de Materiales de Misiones; Argentina. Fil: Vera, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Materiales de Misiones; Argentina. Fil: Vera, María Laura. Universidad Nacional de Misiones. Instituto de Materiales de Misiones; Argentina. Fil: Traid, Hernán Darío. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Materiales de Misiones; Argentina. Fil: Traid, Hernán Darío. Universidad Nacional de Misiones. Instituto de Materiales de Misiones; Argentina. Fil: Maydana, María F. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Materiales de Misiones; Argentina. Fil: Maydana, María F. Universidad Nacional de Misiones. Instituto de Materiales de Misiones; Argentina. Fil: Litter, Marta Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación e Ingeniería Ambiental; Argentina. Fil: Litter, Marta Irene. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental; Argentina. Fil: Schvezov, Carlos Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Materiales de Misiones; Argentina. Fil: Schvezov, Carlos Enrique. Universidad Nacional de Misiones. Instituto de Materiales de Misiones; Argentina. The effect of growth conditions of TiO2 films with nanotubular structures produced by anodic oxidation in electrolytes containing NH4F in glycerol and water was investigated. The effect of anodizing voltage, time, NH4F concentration and initial surface preparation on the formation of nanotube arrays was evaluated. In these cases, the structure was characterized by using scanning electron microscopy, X-ray diffraction and UV–Vis diffuse reflectance spectroscopy. The photocatalytic activity was evaluated using hexavalent chromium in the presence of EDTA (EDTA/Cr(VI) = 1.25 M ratio). The results show that uniform nanotube arrays were only formed with an applied voltage of 20 V, independently of the value of the other parameters studied. The photocatalytic activity increases with the NH4F concentration and the anodizing time, due to the increase in the length of the nanotubes, achieving the highest Cr(VI) transformation (93.8%) after 5 h UV irradiation under the optimal conditions. 2017-07-28 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://hdl.handle.net/20.500.12219/5086 eng info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.enmm.2021.100537 info:eu-repo/semantics/altIdentifier/hdl/http://hdl.handle.net/11336/169710 info:eu-repo/semantics/altIdentifier/urn/https://linkinghub.elsevier.com/retrieve/pii/S2215153221001124 info:eu-repo/semantics/openAccess application/pdf application/pdf 4 MB Elsevier Science
institution Universidad Nacional de Misiones
collection Repositorio RIDUNaM
language English
topic Nanostructures
Surfaces
Photocatalytic properties
Anodic oxidation
Hexavalent chromium reduction
spellingShingle Nanostructures
Surfaces
Photocatalytic properties
Anodic oxidation
Hexavalent chromium reduction
Dwojak, Anabela Natalia
Vera, María Laura
Traid, Hernán Darío
Maydana, María F.
Litter, Marta Irene
Schvezov, Carlos Enrique
Influence of anodizing variables on Cr (VI) photocatalytic reduction using TiO2 nanotubes obtained by anodic oxidation
description Fil: Dwojak, Anabela Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Materiales de Misiones; Argentina.
format info:eu-repo/semantics/article
author Dwojak, Anabela Natalia
Vera, María Laura
Traid, Hernán Darío
Maydana, María F.
Litter, Marta Irene
Schvezov, Carlos Enrique
author_facet Dwojak, Anabela Natalia
Vera, María Laura
Traid, Hernán Darío
Maydana, María F.
Litter, Marta Irene
Schvezov, Carlos Enrique
author_sort Dwojak, Anabela Natalia
title Influence of anodizing variables on Cr (VI) photocatalytic reduction using TiO2 nanotubes obtained by anodic oxidation
title_short Influence of anodizing variables on Cr (VI) photocatalytic reduction using TiO2 nanotubes obtained by anodic oxidation
title_full Influence of anodizing variables on Cr (VI) photocatalytic reduction using TiO2 nanotubes obtained by anodic oxidation
title_fullStr Influence of anodizing variables on Cr (VI) photocatalytic reduction using TiO2 nanotubes obtained by anodic oxidation
title_full_unstemmed Influence of anodizing variables on Cr (VI) photocatalytic reduction using TiO2 nanotubes obtained by anodic oxidation
title_sort influence of anodizing variables on cr (vi) photocatalytic reduction using tio2 nanotubes obtained by anodic oxidation
publisher Elsevier Science
publishDate 2017
url https://hdl.handle.net/20.500.12219/5086
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AT traidhernandario influenceofanodizingvariablesoncrviphotocatalyticreductionusingtio2nanotubesobtainedbyanodicoxidation
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