Visible-light-driven photogenerated cathodic protection of stainless steel by liquid-phase-deposited TiO₂ films

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• 作者：Cai-Xia Lei ; Zu-De Feng ; ^{zdfeng@xmu.edu.cn} ; Han Zhou
• 关键词：Photogenerated cathodic protection ; TiO2 films ; Liquid-phase-deposition
• 刊名：Electrochimica Acta
• 出版年：2012
• 期刊代码：30_00134686
• 类别：ch
• 出版时间：30 April, 2012
• 卷：68
• 期：Complete
• 页码：134-140
• 文件大小：1688 K

摘要

The liquid-phase-deposition (LPD) method was developed to prepare N-F-codoped TiO₂ films that served as photoanodes for the cathodic protection of SUS304 stainless steel (304SS). The as-prepared LPD-TiO₂ films were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Photoelectrochemical properties, such as open-circuit potential (OCP), photocurrent spectra, Tafel polarization curves and electrochemical impedance spectroscopy (EIS) of the LPD-TiO₂ films, were also measured. The results indicate that the LPD-TiO₂ films showed a visible-light response in the wavelength range of 600-750 nm. The photocurrent intensities in both the ultraviolet (UV)-light and visible-light regions were enhanced as the heat treatment (HT) temperature increased. However, the as-prepared LPD-TiO₂ films exhibited the most negative photopotential under both visible-light and white-light illumination. In conclusion, the as-prepared LPD-TiO₂ films would provide the most effective photogenerated cathodic protection of 304SS.