A Photoelectrochemical Study of Highly Ordered TiO2 Nanotube Arrays as the Photoanodes for Cathodic Protection of 304 Stainless Steel

被引:23
作者
Li, Jing [1 ]
Lin, Chang-Jian [1 ]
Lin, Cheng-Gang [1 ]
机构
[1] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
基金
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词
SENSITIZED SOLAR-CELLS; CORROSION PROTECTION; TITANIA NANOTUBES; PHOTOELECTROCATALYTIC DEGRADATION; PHOTOCATALYTIC PROPERTIES; ANODIC-OXIDATION; STAINLESS-STEEL; FABRICATION; COATINGS; WATER;
D O I
10.1149/1.3528278
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Highly ordered TiO2 nanotube (TN) arrays with a regular top porous morphology were fabricated by a facile two-step electrochemical anodization in an ethylene glycol solution containing NH4F and H2O. The morphology, crystalline phase, and composition of the TN films were characterized systematically by scanning electron microscopy, x-ray diffraction, x-ray photoelectron spectroscopy, and ultraviolet-visible spectroscopy. The photoelectrochemical properties of the TNs in 0.5 M NaCl solution were evaluated through electrochemical measurements under illumination and dark conditions. The nanoporous TNs exhibited a drastically enhanced photocurrent in the UV light region. The electrode potentials of 304 stainless steel coupled with the TiO2 nanotube arrays negative shift values are no less than 354 mV under a white light irradiation. The experimental results indicated that the photoelectrochemical performance of the nanoporous-structured TNs was markedly influenced by the crystallization and the novel porous nanotubular architecture. And the nanoporous-structured TNs with a comparable high aspect ratio were able to effectively function photogenerated cathodic protection for metals under UV and visible light illumination. It is possible for such photogenerated cathodic protection to last for a period of 24 h, even in darkness. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3528278] All rights reserved.
引用
收藏
页码:C55 / C62
页数:8
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