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Citation: Cui Xiao-Li, Jiang Zhi-Yu. Electrochemical Behavior of ITO/TiO₂ Electrode under UV Illumination[J]. Acta Physico-Chimica Sinica, ;2002, 18(11): 1014-1017. doi: 10.3866/PKU.WHXB20021111 shu

Electrochemical Behavior of ITO/TiO₂ Electrode under UV Illumination

1.
Department of Chemistry,Department of Materials Science, Fudan University, Shanghai　200433

Received Date: 23 February 2002
Available Online: 15 November 2002

The electrode of nanothin film of TiO2 was prepared by electrodeposition method on ITO surface. Electrochemical behavior of ITO/TiO2 electrode under UV illumination was investigated using the methods of cyclic voltammetry and AC impedance spectroscopy. A new oxidative peak appeared at 0.15 V when the TiO2 electrode was illuminated less than 253.7 nm lights. It belongs to a new species of photo induced Ti3＋. The complex-plane impedance plots for ITO/TiO2 electrode in a solution containing Na2SO4 at open circuit potential exhibit semicircular shapes. The apparent resistance decreased when the electrode was irradiated by UV light. It is confirmed that a new species was produced when the electrode of nanofilm TiO2 under 253.7 nm light irradiation. The open-circuit potential of an electro deposition TiO2 film electrode varied regularly with light on and off. This result shows that the TiO2 electrode has the typical characteristics of n-type semiconductors. It also indicates that photo-induced Ti3＋ is not stable in the solution.
- TiO₂ electrode;UV light;Cyclic voltammetry;AC impedance spectroscopy
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Electrochemical Behavior of ITO/TiO2 Electrode under UV Illumination

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通讯作者: 陈斌, bchen63@163.com

Electrochemical Behavior of ITO/TiO₂ Electrode under UV Illumination