Characterization of nanotubular oxide layer grown on Ti14wt.%Nb alloy by anodization and its performance in photoelectrocatalytic process

Detalhes bibliográficos
Autor(a) principal: Santos, Daniely Reis [UNESP]
Data de Publicação: 2020
Outros Autores: Martins, Cristiane Reis, de Arruda Rodrigues, Christiane [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1007/s10008-020-04663-6
http://hdl.handle.net/11449/198895
Resumo: The development and application of well-organized nanostructured materials with high absorption on visible light for application in photoelectrodegradation of polluting organic compounds are challenging problems. This paper presents the formation of nanotubular oxides grown on Ti14wt.%Nb substrate (NT/Ti14wt.%Nb) by an anodizing process, as well as the influence of the temperature in the oxide crystallization and in the photocatalytic activity performance. The oxide layers were characterized by SEM, EDX, Raman, XRD, and photocurrent studies. Electrochemical impedance spectroscopy measurements and polarization curves were also investigated. The diffusion reflectance UV-Vis-NIR spectroscopy assays showed higher absorption in the visible region for Nb-modified TiO2 nanotubes. The characterization of the nanoscale oxide layer grown on Ti14wt.%Nb alloy showed a hybrid (partially Nb-doped) semiconductor behavior with high current density under UV/visible and visible light. Besides that, NT/Ti14wt.%Nb demonstrated greater resistance to corrosion and low recombination of charges compared with TiO2 nanotubes. In general, the results have shown that NT/Ti14wt.%Nb presents a potential for its application in photoelectrocatalytic (PEC) degradation processes. PEC tests of the Reactive Blue 4 (RB4) dye showed total decoloration (k = 0.17 min−1) and 88% degradation under UV/visible light for the oxide layer grown on Ti14wt.%Nb alloy annealed at 450 °C in comparison with those for the oxide layer grown on TiO2 nanotubes.
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spelling Characterization of nanotubular oxide layer grown on Ti14wt.%Nb alloy by anodization and its performance in photoelectrocatalytic processAnodizationImpedanceNanotubesPhotoelectrocatalysisTitanium-niobium alloyThe development and application of well-organized nanostructured materials with high absorption on visible light for application in photoelectrodegradation of polluting organic compounds are challenging problems. This paper presents the formation of nanotubular oxides grown on Ti14wt.%Nb substrate (NT/Ti14wt.%Nb) by an anodizing process, as well as the influence of the temperature in the oxide crystallization and in the photocatalytic activity performance. The oxide layers were characterized by SEM, EDX, Raman, XRD, and photocurrent studies. Electrochemical impedance spectroscopy measurements and polarization curves were also investigated. The diffusion reflectance UV-Vis-NIR spectroscopy assays showed higher absorption in the visible region for Nb-modified TiO2 nanotubes. The characterization of the nanoscale oxide layer grown on Ti14wt.%Nb alloy showed a hybrid (partially Nb-doped) semiconductor behavior with high current density under UV/visible and visible light. Besides that, NT/Ti14wt.%Nb demonstrated greater resistance to corrosion and low recombination of charges compared with TiO2 nanotubes. In general, the results have shown that NT/Ti14wt.%Nb presents a potential for its application in photoelectrocatalytic (PEC) degradation processes. PEC tests of the Reactive Blue 4 (RB4) dye showed total decoloration (k = 0.17 min−1) and 88% degradation under UV/visible light for the oxide layer grown on Ti14wt.%Nb alloy annealed at 450 °C in comparison with those for the oxide layer grown on TiO2 nanotubes.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Laboratório de Engenharia e Controle Ambiental Departamento de Engenharia Química Instituto de Ciências Ambientais Químicas e Farmacêuticas UNIFESP Universidade Federal de São Paulo Campus Diadema, São Nicolau Street, 210, DiademaInstitute of Chemistry National Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) UNESP, P.O. Box 355Institute of Chemistry National Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) UNESP, P.O. Box 355FAPESP: Process Number 06/61261–2FAPESP: Process Number 2014/50945-4CNPq: Process Number 483285/2011–0Universidade Federal de São Paulo (UNIFESP)Universidade Estadual Paulista (Unesp)Santos, Daniely Reis [UNESP]Martins, Cristiane Reisde Arruda Rodrigues, Christiane [UNESP]2020-12-12T01:24:52Z2020-12-12T01:24:52Z2020-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1877-1888http://dx.doi.org/10.1007/s10008-020-04663-6Journal of Solid State Electrochemistry, v. 24, n. 8, p. 1877-1888, 2020.1433-07681432-8488http://hdl.handle.net/11449/19889510.1007/s10008-020-04663-62-s2.0-85085543650Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Solid State Electrochemistryinfo:eu-repo/semantics/openAccess2021-10-22T20:56:11Zoai:repositorio.unesp.br:11449/198895Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:24:35.402619Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Characterization of nanotubular oxide layer grown on Ti14wt.%Nb alloy by anodization and its performance in photoelectrocatalytic process
title Characterization of nanotubular oxide layer grown on Ti14wt.%Nb alloy by anodization and its performance in photoelectrocatalytic process
spellingShingle Characterization of nanotubular oxide layer grown on Ti14wt.%Nb alloy by anodization and its performance in photoelectrocatalytic process
Santos, Daniely Reis [UNESP]
Anodization
Impedance
Nanotubes
Photoelectrocatalysis
Titanium-niobium alloy
title_short Characterization of nanotubular oxide layer grown on Ti14wt.%Nb alloy by anodization and its performance in photoelectrocatalytic process
title_full Characterization of nanotubular oxide layer grown on Ti14wt.%Nb alloy by anodization and its performance in photoelectrocatalytic process
title_fullStr Characterization of nanotubular oxide layer grown on Ti14wt.%Nb alloy by anodization and its performance in photoelectrocatalytic process
title_full_unstemmed Characterization of nanotubular oxide layer grown on Ti14wt.%Nb alloy by anodization and its performance in photoelectrocatalytic process
title_sort Characterization of nanotubular oxide layer grown on Ti14wt.%Nb alloy by anodization and its performance in photoelectrocatalytic process
author Santos, Daniely Reis [UNESP]
author_facet Santos, Daniely Reis [UNESP]
Martins, Cristiane Reis
de Arruda Rodrigues, Christiane [UNESP]
author_role author
author2 Martins, Cristiane Reis
de Arruda Rodrigues, Christiane [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Federal de São Paulo (UNIFESP)
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Santos, Daniely Reis [UNESP]
Martins, Cristiane Reis
de Arruda Rodrigues, Christiane [UNESP]
dc.subject.por.fl_str_mv Anodization
Impedance
Nanotubes
Photoelectrocatalysis
Titanium-niobium alloy
topic Anodization
Impedance
Nanotubes
Photoelectrocatalysis
Titanium-niobium alloy
description The development and application of well-organized nanostructured materials with high absorption on visible light for application in photoelectrodegradation of polluting organic compounds are challenging problems. This paper presents the formation of nanotubular oxides grown on Ti14wt.%Nb substrate (NT/Ti14wt.%Nb) by an anodizing process, as well as the influence of the temperature in the oxide crystallization and in the photocatalytic activity performance. The oxide layers were characterized by SEM, EDX, Raman, XRD, and photocurrent studies. Electrochemical impedance spectroscopy measurements and polarization curves were also investigated. The diffusion reflectance UV-Vis-NIR spectroscopy assays showed higher absorption in the visible region for Nb-modified TiO2 nanotubes. The characterization of the nanoscale oxide layer grown on Ti14wt.%Nb alloy showed a hybrid (partially Nb-doped) semiconductor behavior with high current density under UV/visible and visible light. Besides that, NT/Ti14wt.%Nb demonstrated greater resistance to corrosion and low recombination of charges compared with TiO2 nanotubes. In general, the results have shown that NT/Ti14wt.%Nb presents a potential for its application in photoelectrocatalytic (PEC) degradation processes. PEC tests of the Reactive Blue 4 (RB4) dye showed total decoloration (k = 0.17 min−1) and 88% degradation under UV/visible light for the oxide layer grown on Ti14wt.%Nb alloy annealed at 450 °C in comparison with those for the oxide layer grown on TiO2 nanotubes.
publishDate 2020
dc.date.none.fl_str_mv 2020-12-12T01:24:52Z
2020-12-12T01:24:52Z
2020-08-01
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1007/s10008-020-04663-6
Journal of Solid State Electrochemistry, v. 24, n. 8, p. 1877-1888, 2020.
1433-0768
1432-8488
http://hdl.handle.net/11449/198895
10.1007/s10008-020-04663-6
2-s2.0-85085543650
url http://dx.doi.org/10.1007/s10008-020-04663-6
http://hdl.handle.net/11449/198895
identifier_str_mv Journal of Solid State Electrochemistry, v. 24, n. 8, p. 1877-1888, 2020.
1433-0768
1432-8488
10.1007/s10008-020-04663-6
2-s2.0-85085543650
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of Solid State Electrochemistry
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1877-1888
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808128230519996416

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