2023 Fiscal Year Annual Research Report
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 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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| 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 |
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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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