| Project/Area Number |
12650776
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
触媒・化学プロセス
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| Research Institution | TOKYO GAKUGEI UNIVERSITY |
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Principal Investigator |
HASEGAWA Sadao Tokyo Gakugei University, Department of Chemistry, Professor, 教育学部, 教授 (60014734)
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| Co-Investigator(Kenkyū-buntansha) |
KOKUSEN Hisao Kanazawa lnstitute of Technology, Department of Engineering, Associate Professor, 工学部, 助教授 (10251571)
KOSAKA Tomomi Tokyo Gakugei University, Department of Chemistry, Professor, 教育学部, 助手 (80282789)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2001: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2000: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | bactericidal activity / titania / active oxygen / ESR |
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| Research Abstract |
The aim of this experiment was that investigated the correlation between the sample preparation and the bactericidal activity of Cu-MgO/Ti0_2 and Cu-Fe/ZrO_2 against Escherichia coli which were known as Nox reduction catalysts. The evacuation temperature affected the bactericidal function of Cu/TiO_2. It was concluded that Cu^<2+> species on TiO_2 was reduced by the evacuation treatment and the quantity of OH radical was also decreased. In the case of MgO/TiO_2, it was found that MgTlO_3 complex oxide was formed by the calcinations at above 873K using Mg K-edge XANES analysis. However, the environmental structure of Mg species in Cu-MgO/TiO_2 was maintained MgO(rock salt type) until at 973K The bactericidal function ofMgTiO_3 was much lower than that ofMgO, because its solubility ofMg^<2+> ion. The bactericidal activity of Cu/ZrO_2was slightly weaker than that of Cu/TiO_2, however, it was improved by Fe addition. It was found that the electroi> state of Cu atom was affected by Fe addition and then OH radical was effectively produced. Consequently, the bactericidal function of these catalysts was much affected by its surface structure and the electron state of chemical species, especially, Cu atom. Metal ion and active oxygen radicals were known to be typical bactericidal species. In this experiment, it was concluded that both factors were affected to the bactericidal activity. However, we could not clarify the correlation between the Nox reduction and the bactericidal activity.
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