水中ラジカル反応を利用した新たな手法による光機能性金属酸化物ナノ構造の作製
| Project/Area Number |
21K04823
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 28030:Nanomaterials-related
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| Research Institution | Hokkaido University |
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Principal Investigator |
張 麗華 北海道大学, 工学研究院, 准教授 (60719714)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | ナノ酸化物 / 水中結晶光合成 / ラジカル反応 / 活性酸素種 / 光機能性 / metal oxide / submerged photosynthesis / hydrogen peroxide / radical reactions / nano structure / electrochemistry / metal oxides / photofunction / copper / molybdenum / tungsten / 金属酸化物 / 光機能 |
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| Outline of Research at the Start |
本研究では、生体内反応や触媒研究分野などで限定的に知られてきた水のラジカル反応を積極的に利用し、光照射、活性酸素種、超音波照射など水中フリーラジカル生成手法を組み合わせ、新たな金属酸化物ナノ構造の創製法を提案する。これにより、従来不可能であった金属原料から直接金属酸化物ナノ構造の作製を行い、光電子デバイスへの応用性を評価する。
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| Outline of Annual Research Achievements |
In this work, we developed a submerged radical reactions method for the fabrication of metal nano oxides for photo functional applications. The radical reactions were generated by light illumination (UV, and visible light), ultrasound, and reactive oxygen species, and this method was applied for copper oxide, tungsten and molybdenum hydrate oxides nanoparticles fabrication.
For the copper oxide fabrication, both the reactive oxygen species (H2O2, HClO, and H2O2-HClO mixture) and light illumination could enhance the growth of the nano particles.
For the tungsten and molybdenum hydrate oxides, both H2O2 and UV light illumination are necessary for the crystal growth. H2O2 can dissolve the metals to obtain the metal ions solutions. UV light can promote the formation of nanocrystal nuclei. In addition, introducing heat energy by using infrared light illumination can accelerate the fabrication process.
The fabricated oxides show high specific capacitance by photoelectrochemical analysis, which indicate their photo-functional applications. In addition, the doped tungsten and molybdenum hydrate oxides show high solar light absorption, especially in the visible and infrared light range, which indicates their potential for all solar light applications.
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Report
(3 results)
Research Products
(44 results)
