Microwave-assisted crystallization into anatase of amorphous TiO2 nanotubes electrochemically grown on a Ti substrate

Autor(es)

Aquino, Jose M. ^[1] ; Rocha-Filho, Romeu C. ^[1] ; Bocchi, Nerilso ^[1] ; Biaggio, Sonia R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Quim, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Letters; v. 126, p. 52-54, JUL 1 2014.
• Citações Web of Science: 6

Resumo

Hybrid thermal heating induced by a microwave oven was unprecedentedly used to successfully attain rapid and facile crystallization into the anatase phase of amorphous TiO2 nanotubes grown on a Ti substrate. Amorphous TiO2 nanotubes were obtained by anodic oxidation of a Ti foil either in aqueous or organic medium. Afterward, these TiO2 nanotubes were thermally treated by hybrid heating in a common commercial microwave oven. The as-grown amorphous nanotubes were characterized by SEM and XRD, whereas the evolution of the nanotubes crystallization with thermal treatment time was followed by XRD. The crystallization into the anatase phase of the amorphous TiO2 nanotubes occurred after only 2 or 3 min of hybrid thermal treatment, which is very short and convenient as compared with several hours that are needed when conventional thermal treatment is used. (C) 2014 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 12/13587-7 - Utilização de óxidos metálicos depositados sobre substratos planares e tridimensionais para a degradação eletroquímica e fotoquímica de poluentes orgânicos
• Beneficiário: José Mario de Aquino
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado