Modeling the Growth Kinetics of Anodic TiO2 Nanotubes

被引：27

作者：

Apolinario, A. ^{[1
,2
]}

Quiterio, P. ^{[1
,2
]}

Sousa, C. T. ^{[1
,2
]}

Ventura, J. ^{[1
,2
]}

Sousa, J. B. ^{[1
,2
]}

Andrade, L. ^{[3
]}

Mendes, A. M. ^{[3
]}

Araujo, J. P. ^{[1
,2
]}

机构：

[1] Univ Porto, Fac Ciencias, IFIMUP, P-4169007 Oporto, Portugal

[2] Univ Porto, Fac Ciencias, IN Inst Nanosci & Nanotechnol, Dep Fis & Astron, P-4169007 Oporto, Portugal

[3] Fac Engn, LEPABE Lab Proc Engn Environm Biotechnol & Energy, Dept Engn Quim, P-4200465 Oporto, Portugal

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2015年 / 6卷 / 05期

关键词：

POROUS ALUMINA; FABRICATION; ANODIZATION; ARRAYS; TITANIUM;

D O I：

10.1021/jz502380b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The fundamental understanding of the barrier layer (delta(b)) growth in TiO2 nanotubes (NTs) is here established and compared with the classical metal oxidation theory from Mott and Cabrera. The role of delta(b) in the anodization of TiO2 NTs under different applied potentials and times was analyzed using scanning transmission electron microscopy (STEM). Contrary to the well-known case of anodic aluminum oxide, we found that delta(b) of TiO2 NTs progressively grows over time due to the nonsteady anodization regime. We then establish a relation between the phenomenological growth of the barrier layer with time and applied voltage, delta(b)(V,t) using the high-field Mott and Cabrera conduction theory. The developed model was found to be in excellent agreement with the experimental data from both STEM and anodization curves. On the basis of these results, the relationship between delta(b) and the anodization time and potential can now be quantitatively understood.

引用

页码：845 / 851

页数：7

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