Formation of high aspect ratio TiO2 nanotube arrays by anodization of Ti foil in organic solution

Srimala Sreekantan, and Roshasnorlyza Hazan, and Khairul Arifah Saharudin, and Lai, Chin Wei and Ishak Mat, (2011) Formation of high aspect ratio TiO2 nanotube arrays by anodization of Ti foil in organic solution. Sains Malaysiana, 40 (3). pp. 227-230. ISSN 0126-6039

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Abstract

Titanium oxide (TiO2) nanotubes were successfully formed by anodization of pure titanium foil in a standard two-electrode bath consisting of ethylene glycol solution containing 5 wt% NH4F. The pH of the solution was ∼ 7 and the anodization voltage was 60 V. It was observed that such anodization condition results in ordered arrays of TiO2 nanotubes with smooth surface and a very high aspect ratio. It was observed that a minimum of 1 wt % water addition was required to form well ordered TiO2 nanotubes with length of approximately 18.5 μm. As-anodized sample, the self-organized TiO2 nanotubes have amorphous structure and annealing at 500oC of the nanotubes promote formation of anatase and rutile phase. Photocatalytic activity of well ordered TiO2 nanotubes with two different lengths was evaluated by measuring the degradation of methyl orange (MO). The elaboration of this observation is described in detail in this paper.

Item Type:Article
Keywords:Anodization; ethylene glycol; phase transformation; TiO2 nanotubes
Journal:Sains Malaysiana
ID Code:702
Deposited By: Mr Azam
Deposited On:23 Mar 2011 03:09
Last Modified:14 Dec 2016 06:27

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