| Project/Area Number |
23360349
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Reaction engineering/Process system
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| Research Institution | Osaka University |
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Principal Investigator |
HIRAI Takayuki 大阪大学, 太陽エネルギー化学研究センター, 教授 (80208800)
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| Co-Investigator(Kenkyū-buntansha) |
SHIRAISHI Yasuhiro 大阪大学, 太陽エネルギー化学研究センター, 准教授 (70343259)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2011: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
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| Keywords | 光触媒 / 有機合成 / 金属ナノ粒子 / 金 / 白金 / パラジウム / 合金 / 半導体酸化物 / 可視光 / イミン / ワンポット / 部分酸素化 |
|---|
| Research Abstract |
Efficient and selective photocatalytic reactions have been achieved with the photocatalysts loaded with metal nanoparticles. We clarified that several reactions such as secondary amine synthesis from alcohol and nitroaromatics, dehalogenation of aromatic halides, and hydrogen peroxide production by the catalysts loaded with Pd, Pt-Pd alloy, and Au-Ag alloy nanoparticles. In particular, we found that Au or Pt nanoparticles when loaded on titanium dioxide promotes efficient aerobic oxidation via the absorption of visible light by the particles followed by the transfer of excited electrons to semiconductor conduction band. In addition, supported Au-Cu alloy particles efficiently promote aerobic oxidation, although the activity decreases with by the oxidation of surface Cu atoms. We found that visible light irradiation successfully reduces the oxidized surface Cu via the visible light absorption by Au atoms, thus maintaining high oxidation activity.
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