Investigation on the formation behavior of noble metal alloy nanoparticles during anodization and its control and applications
| Project/Area Number |
18H01752
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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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| Review Section |
Basic Section 26050:Material processing and microstructure control-related
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| Research Institution | Osaka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
藤本 愼司 大阪大学, 工学研究科, 教授 (70199371)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2019: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
Fiscal Year 2018: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
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| Keywords | アノード酸化 / チタニア / ナノチューブ / 貴金属 / ナノ粒子 / 自己組織化 / チタン合金 / 陽極酸化 / 貴金属元素 / ナノポーラス / 貴金属合金 / 貴金属ナノ粒子 / 合金化 / 薄膜 / 酸化物 |
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| Outline of Final Research Achievements |
Anodization, the electrochemical oxidation of metal by applying voltage in electrolyte, forms porous oxide layers under the optimized electrolyte and voltage. This work aims at revealing the optimized anodization which can simultaneously realize the porous TiO2 layer formation and the deposition of noble metal nanoparticles on the layer by anodizing Ti alloys containing noble metals as such structures are found to enhance the hydrogen evolution through the water splitting. When the amount of alloying elements is large, homogeneous porous layer was not grown. Although homogeneous porous layer was obtained when the amount is small, on the other hand, the deposition of nanoparticles was not confirmed at low applied voltage. However, the anodization of the Ti alloys at higher voltage led to the formation of homogeneous porous layer where nanoparticles were highly dispersed. These imply that the optimized amount of alloying element and anodization voltage are desired to achieve the process.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究は水の光分解による水素生成に用いる、貴金属ナノ粒子が担持した光触媒をチタン合金のアノード酸化によりナノ構造を有するTiO2担体の形成とナノ粒子担持を同時に実現するための条件を見出したことは学術的に意義があるといえる。また研究代表者らが行ってきた一連のチタン合金の成果と併せると、チタンのアノード酸化における合金元素の役割を系統的に理解することができ、この点も当該分野の深化に貢献できる。
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Report
(4 results)
Research Products
(13 results)
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[Journal Article] チタン2020
Author(s)
土谷博昭
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Journal Title
チタン・チタン合金のアノード酸化によるTiO2ナノチューブ形成
Volume: 68
Pages: 226-232
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