Interfacial Barrier Layer Properties of Three Generations of TiO2 Nanotube Arrays

被引：67
作者：
Ainouche, L. [1 ,2 ]
Hamadou, L. [1 ]
Kadri, A. [1 ]
Benbrahim, N. [1 ]
Bradai, D. [2 ]
机构：
[1] UMMTO, LPCM, Tizi Ouzou 15000, Algeria
[2] USTHB, Fac Phys, Lab Phys Mat, Bab Ezzouar 16111, Alger, Algeria
来源：
ELECTROCHIMICA ACTA | 2014年 / 133卷
关键词：
Titanium dioxide; Anodization; Nanotubular structure; Barrier layer; Electrochemical impedance spectroscopy; Scanning electrochemical microscopy; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; PITTING CORROSION; TITANIUM-OXIDE; CRYSTALLOGRAPHIC ORIENTATION; SOLAR-CELLS; RESISTIVITY DISTRIBUTIONS; POLYCRYSTALLINE TITANIUM; CONVERSION EFFICIENCY; ELECTRONIC STATES; PRECURSOR SITES;
D O I：
10.1016/j.electacta.2014.04.086
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Three generations of TiO2 nanotubular arrays (TiNT) were obtained by anodization of titanium foil in three different solutions: Aqueous acid containing fluoride media, organic based containing fluoride media and chloride containing electrolyte. This paper investigates the effect of the electrolyte composition on barrier layer characteristics of TiNT. Correlation between the dimensional aspect of TiNT and the electrochemical properties was investigated. Electrochemical characteristic from Electrochemical Impedance Spectroscopy (EIS) were discussed. EIS is considered to be a highly sensitive technique that allows determining barrier oxide layer characteristics. Semiconducting properties as well as thicknesses are discussed in correlation with anodizing electrolyte. Scanning electrochemical microscopy (SECM) was employed for in situ characterization of surface chemical activity of titanium in chloride containing electrolyte. The SECM has detected corrosion pits as well as the surrounding cathodic reaction. Nucleated pits on titanium takes place on the top of grain most probably with surface orientation (0001). (C) 2014 Elsevier Ltd. All rights reserved.
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收藏
页码：597 / 609
页数：13
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