| Project/Area Number |
18550140
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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 |
Environmental chemistry
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| Research Institution | Osaka University |
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Principal Investigator |
TOJO Sachiko Osaka University, The Institute of Scientific and Industrial Research, Assistant Professor (50197844)
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| Project Period (FY) |
2006 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
|
| Budget Amount *help |
¥3,930,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥330,000)
Fiscal Year 2007: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2006: ¥2,500,000 (Direct Cost: ¥2,500,000)
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| Keywords | TiO_2 / polyoxometalate / photocatalytic reactions / laser flash photolysis / electron transfer / radical ions / 光触媒 / (3)光触媒 |
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| Research Abstract |
We have successfully investigated the one-electron oxidation and reduction processes of several compounds during POM-mediated TiO_2 photocatalytic reactions using a two-color two-laser flash-photolysis technique. It should he noted that both processes were examined using the same system. For the one-electron oxidation prosses, the efficiency of the one-electron oxidation is significantly enhanced due to electron transfer from the CB of TiO_2 to POM. For the one-electron reduction processes, we observed electron injection from PW_12O_40^4*. to the CB of TiO_2, and achieved storage of the electrons in the TiO_2/PW_12O_40^3-/MV^2+ ternary system using a two-color two-laser irradiation. The present results will lead to further application of TiO_2/POM photocatalysts and demonstrate that the two-color two-laser flash-photolysis technique is a powerflul tool for the investigation of interfacial electron transfer at the heterogeneous surfaces of nanocomposite materials.
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