Open AccessInvestigation of the controllable growth of the TiO2 nanotube arrays fabricated by anodic oxidation method
Author(s) -
Chengwei Wang,
BaoHong Ma,
Yan Li,
Jianbiao Chen,
Jian Wang,
Weimin Liu
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.5800
Subject(s) - materials science , anodizing , anatase , ethylene glycol , nanotube , rutile , chemical engineering , aqueous solution , amorphous solid , electrolyte , titanium , foil method , nanotechnology , composite material , electrode , organic chemistry , metallurgy , carbon nanotube , chemistry , aluminium , photocatalysis , engineering , catalysis
The highly ordered and uniform TiO2 nanotube arrays were fabricated by anodic oxidation of titanium foil in HF aqueous solution or ethylene glycol containing NH4F and deionized water. The diameterdensitylength and wall thickness of nanotube arrays can be controlled effectively by varying the anodization parameters including electrolyte compositionvoltageand time. The microstructures of the titania nanotube arrays were characterized by X-ray diffraction (XRD). The results showed that the as-anodized titania nanotubes were amorphous. And when annealed in vacuum or in oxygen ambient at 500℃the samples prepared in HF aqueous solution showed only anatase phaseand the samples prepared in ethylene glycol containing NH4F and deionized water showed both anatase and rutile phases. And the former and the latter batch of samples became better crystallized when annealed in oxygen and in vacuumrespectively. Furthermorethe controllable growth mechanism of nanotube arrays is discussed.