- 作者: 江志裕
- 作者服務機構: Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
- 中文摘要: Electrochemical behavior of an ITO/TiO2 electrode both under ultraviolet (UV) illumination and in the dark was investigated using the methods of cyclic voltammetry and ac impedance spectroscopy. A new oxidative peak is observed at 0.15 V when the TiO2 electrode was illuminated by UV light for a certain time. The peak current and the anodic photocurrent increased with the increase of UV light intensity. It is assumed that the new peak belonging to the oxidation of Ti3+, which was formed on the electrode surface during the UV illumination. It is also found that the apparent resistance was decreased but the capacitance was increased when the TiO2 electrode was illuminated by UV light according to the measurement results of ac impedance. Based on the results in this paper, it was directly proved that Ti3+ was actually formed when the electrode was irradiated by UV light.
- 英文摘要: --
- 中文關鍵字: TiO2 electrode; ?UV illumination; ?Cyclic voltammetry; ?Ac impedance spectroscopy.
- 英文關鍵字: --