| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
Titanium dioxide modified with Pt(IV), Cr(III) or Cu(II) ion was prepared under various conditions by using sol-gel method and the photocatalytic activity was evaluated for the degradation of 4-chlorophenol in water under visible light irradiation. For comparison, Cu or Cr-grafted TiO2 was also synthesized by a simple impregnation method. In the case of Cu(II) ion, the impregnation method is more advantageous than the sol-gel method. The photocatalytic activity of Cu-grafted TiO2 decreases linearly as the number-density of Cu(II) increases on the TiO2 surface. On the other hand, Pt and Cr ions can be doped in TiO2 by the sol-gel method and their photocatalytic activities are much higher than Cu- or Cr-grafted TiO2. We have clarified that the presence of Pt or Cr ion with different valence states in TiO2 increases the photocatalytic activity.
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