Effect of the anodization voltage on the dimensions and photoactivity of titania nanotubes arrays - Laboratoire Interfaces et Systèmes Electrochimiques Accéder directement au contenu
Article Dans Une Revue Surface and Interface Analysis Année : 2013

Effect of the anodization voltage on the dimensions and photoactivity of titania nanotubes arrays

Résumé

This work compares the behaviors of TiO 2 nanotube (TNTs) array obtained by anodization of Ti foils in an ethylene glycol/NH 4 F/ water electrolyte with different applied voltages during a constant anodization time, and for the same electrolyte composition. The crystal structure and surface morphology of the annealed anodic fi lms are investigated by X-Ray diffraction system, Raman spectroscopy and scanning electron microscopy, respectively. The TiO 2 nanotubes obtained at potentials of 20 - 40 - 60V show different inner diameters (42 - 89 - 124nm), tube length (1.2 - 3.3 - 12.7 μ m) and wall thicknesses (12 - 15 - 18nm). The in fl uence of these geometric parameterson the photoelectrochemical properties and the photocatalytic activity were investigated in detail. The results showed that the photocatalytic performances of TNT fi lms are improved when the speci fi c surface, the tube length and the solid fraction are increased, but the increase is slowed down when a limiting thickness of the layer is reached. The surface states which usually show high density in nanostructured layers do not seem to in fl uence signi fi cantly the photocatalytic activity of the layers.

Domaines

Autre Chimie

Dates et versions

hal-00863010 , version 1 (18-09-2013)

Identifiants

Citer

Atef Atyaoui, Hubert Cachet, Eliane Sutter, L. Bousselmi. Effect of the anodization voltage on the dimensions and photoactivity of titania nanotubes arrays. Surface and Interface Analysis, 2013, 45, pp.1751-1759. ⟨10.1002/sia.5317⟩. ⟨hal-00863010⟩
42 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More