The Decomposition Mechanism of Titania Film with Nanotube Structure

Abstract:

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The ordered nanochannel-array of anodic titanium oxide (ATO) is formed on the electro-polished titanium substrate. This reproducible procedure of long-range ordered nanochannel ATO retains 170 nm films in length. The process is deduced by electrochemically and thermodynamically; from high defect structure of porous ATO and small sizing of decomposing TiO2 cluster on the surfaces. In this study, ATO with 68.2% porosity is discomposed at 581 °C under oxygen partial pressure of 4×10-9 atm. The pore of ATO has wall thickness of 25 nm with density of 8×109 per cm2 under 1.2 vol.% hydrofluoric acid (HF) and 10 vol.% sulfuric acid (H2SO4) electrolyte for 90 seconds of 20 V of applied potential. The pore size is 100 nm in diameter and uniformly distributed with 120 nm pore-to pore distance in between.

Info:

Periodical:

Advanced Materials Research (Volumes 189-193)

Edited by:

Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang

Pages:

2660-2664

DOI:

10.4028/www.scientific.net/AMR.189-193.2660

Citation:

C. C. Chen et al., "The Decomposition Mechanism of Titania Film with Nanotube Structure", Advanced Materials Research, Vols. 189-193, pp. 2660-2664, 2011

Online since:

February 2011

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Price:

$35.00

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