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KMID : 0385519900030010097
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Analytical Science & Technology
1990 Volume.3 No. 1 p.97 ~ p.103
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Electrochemical Properties of Semiconductor Electrodes in Eectrolyte Solution According to Electrode Potentials
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Choi Yong-Kook
Chjo Ki-Hyung
Seo Seong-Seob
Lee Song-Ju
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Abstract
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Titanium dioxide thin filims are prepared by water vapor oxidation and air oxidation at temperature 600--1000C. The electrochemical properties of n-type TiO2-., electrodes have been investigated in 1M NaOH.
Peak voltage of electrodes are observed between-0.8V~-1.Ov in cyclic voltammogram according to various scan rate. In this range of the peak voltages, the values of ana, 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 (V jb) were obtained to be -1.04V and -0.92--1,08 from the
measurment of photocurrent and capacitance in accordance with the applied potential: vs. SCE, respectively. The values of Vjh by the photocurrent was given better than by the capacitance.
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KEYWORD
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Physical properties of n-type titanium oxide, volta
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