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

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Federal de São Paulo (UNIFESP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorSantos, Daniely Reis [UNESP]-
Autor(es): dc.creatorMartins, Cristiane Reis-
Autor(es): dc.creatorde Arruda Rodrigues, Christiane [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:25:50Z-
Data de disponibilização: dc.date.available2022-02-22T00:25:50Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-08-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s10008-020-04663-6-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/198895-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/198895-
Descrição: dc.descriptionThe 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.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionLaboratório 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, Diadema-
Descrição: dc.descriptionInstitute of Chemistry National Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) UNESP, P.O. Box 355-
Descrição: dc.descriptionInstitute of Chemistry National Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) UNESP, P.O. Box 355-
Descrição: dc.descriptionFAPESP: Process Number 06/61261–2-
Descrição: dc.descriptionFAPESP: Process Number 2014/50945-4-
Descrição: dc.descriptionCNPq: Process Number 483285/2011–0-
Formato: dc.format1877-1888-
Idioma: dc.languageen-
Relação: dc.relationJournal of Solid State Electrochemistry-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAnodization-
Palavras-chave: dc.subjectImpedance-
Palavras-chave: dc.subjectNanotubes-
Palavras-chave: dc.subjectPhotoelectrocatalysis-
Palavras-chave: dc.subjectTitanium-niobium alloy-
Título: dc.titleCharacterization of nanotubular oxide layer grown on Ti14wt.%Nb alloy by anodization and its performance in photoelectrocatalytic process-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.