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Abstract ▼ AI-Helper

Titanium dioxide thin filims are prepared by water vapor oxidation and air oxidation at temperature 600-1000℃. The electrochemical properties of n-type TiO_(2-x) electrodes have been investigated in 1M NaOH. Peak voltage of electrodes are observed between -0.8~-1.OV in cyclic voltammogram accordin...

Titanium dioxide thin filims are prepared by water vapor oxidation and air oxidation at temperature 600-1000℃. The electrochemical properties of n-type TiO_(2-x) electrodes have been investigated in 1M NaOH. Peak voltage of electrodes are observed between -0.8~-1.OV in cyclic voltammogram according to various scan rate. In this range of the peak voltages, the values of αna, and n are obtained to be 0.2~0.5 and 3~4 respectively. The values of E˚´of the electrodes are obtained to be -0.091~+0.113V and the sample prepared at higher temperature has the more positive potential than that at lower temperature by Tafel polt. The values of flat band potential (Vfb) were obtained to be -1.04V and -0.92~-1.08V from the measurment of photocurrent and capacitance in accordance with the applied potential vs. SCE. respectively. The values of Vfb by the photocurrent was given better than by the capacitance.