Citation: ZHU Yan-Feng, DU Rong-Gui, LI Jing, QI Hai-Qing, LIN Chang-Jian. Photogenerated Cathodic Protection Properties of a TiO₂ Nanowire FilmPrepared by a Hydrothermal Method[J]. Acta Physico-Chimica Sinica, ;2010, 26(09): 2349-2353. doi: 10.3866/PKU.WHXB20100913 shu

Photogenerated Cathodic Protection Properties of a TiO₂ Nanowire FilmPrepared by a Hydrothermal Method

1.
State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China

Received Date: 16 April 2010
Available Online: 13 July 2010
Fund Project: 国家高技术研究发展专项(2009AA03Z327) (2009AA03Z327)国家科技支撑计划项目(2007BAB27B04)资助 (2007BAB27B04)

A TiO₂ film was synthesized on the surface of a Ti substrate by a hydrothermal method, followed by acid treatment and calcination. The properties of the TiO₂ film were characterized by scanning electron microscopy, X-ray diffraction, and ultraviolet-visible spectrophotometry. The photogenerated cathodic protection properties of the TiO₂ film were investigated by electrochemical techniques. The corrosion performance of 403 stainless steel coupled to a TiO2 film photoanode in different solutions was evaluated by photogenerated potential and electrochemical impedance spectroscopy. The results showed that the TiO2 film was composed of many randomly-oriented anatase nanowires of about 10 nm in diameter. The TiO₂ nanowire film prepared by the hydrothermal reaction at 150 ℃ for 6 h was used for the photogenerated cathodic protection of 403 stainless steel. When we coupled the steel in a 0.5 mol·L^-1 NaCl solution to the TiO₂ film photoanode in a mixed solution containing 0.3 mol·^-1 Na₂SO₄ and 0.5 mol·L^-1 HCOOH, its potential decreased by 545 mV. Additionally, the charge transfer resistance of the electrode reaction process for the coupled steel decreased considerably. The results also indicated that the HCOOH in the mixed solution improved the photogenerated cathodic protection of the TiO₂ filmphotoanode.
- Hydrothermal method,
- TiO₂ nanowire film,
- Photogenerated cathodic protection,
- 403 stainless steel
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沈阳化工大学材料科学与工程学院沈阳 110142

Photogenerated Cathodic Protection Properties of a TiO2 Nanowire FilmPrepared by a Hydrothermal Method

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通讯作者: 陈斌, bchen63@163.com

Photogenerated Cathodic Protection Properties of a TiO₂ Nanowire FilmPrepared by a Hydrothermal Method