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Citation: LI Jing, YUN Hong, LIN Chang-Jian. The Fe-doped TiO₂ Nanotube Arrays as a Photoanode for Cathodic Protection of Stainless Steel[J]. Acta Physico-Chimica Sinica, ;2007, 23(12): 1886-1892. doi: 10.3866/PKU.WHXB20071211 shu

The Fe-doped TiO₂ Nanotube Arrays as a Photoanode for Cathodic Protection of Stainless Steel

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

Received Date: 25 June 2007
Available Online: 8 October 2007

A highly ordered Fe-doped TiO2 nanotube layer was fabricated by potentiostatic anodization of pure titaniumin fluorinated electrolyte solutions containing iron ions. The structure and composition of the as-prepared TiO2 nanotubes were characterized by SEM, XRD, UV-Vis, and XPS. The effects of temperature, time, dopant content on the morphologies, structure and photochemical properties of the TiO2 nanotube arrays were investigated systemically. The performances of photogenerated cathodic protection and the photoelectrochemical response for the Fe-doped TiO2 nanotube layers under illumination and dark conditions were evaluated through the electrochemical measurements. It was found that Fe ions in the TiO2 nanotube arrays could suppress the recombination of photogenerated hole-electron. The Fe-doped TiO2 nanotubes showed a stronger absorption in the 410-650 nm range. The open-circuit potentials of 316LSS (stainless steel) coupled with the Fe-doped TiO2 nanotubes layers shifted negatively under visible light irradiation (λ>400 nm), and maintained negatively for a period even in dark condition. It was indicated that the Fe-doped TiO2 nanotubes layers were able to create effectively a photogenerated cathodic protection for metals under regular sunlight conditions.
- Anodic oxidation; TiO2 nanotube; Fe-doped; Photocathodic protection; Visible-light; Mechanism
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The Fe-doped TiO2 Nanotube Arrays as a Photoanode for Cathodic Protection of Stainless Steel

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通讯作者: 陈斌, bchen63@163.com

The Fe-doped TiO₂ Nanotube Arrays as a Photoanode for Cathodic Protection of Stainless Steel