2021 Fiscal Year Final Research Report
Enhanced photocatalytic performance and physical properties for visible-light active double-perovskite semiconducting materials
| Project/Area Number |
19K04995
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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 26020:Inorganic materials and properties-related
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| Research Institution | Iwate University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
谷口 晴香 岩手大学, 理工学部, 助教 (60735877)
西館 数芽 岩手大学, 理工学部, 教授 (90250638)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 可視光応答光触媒 / ダブルペロブスカイト型酸化物半導体 / サイトレイトパイロリシス法 / 希土類イオン / 価数共存状態 / エネルギーバンドギャップ制御 / 酸化還元電位 |
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| Outline of Final Research Achievements |
Cubic perovskite oxides have been extensively studied in the field of solar light active photocatalysis for water splitting into hydrogen and oxygen evolution as alter-native materials for TiO2. We have investigated the lattice structures, valence states, band gap energies, and photocatalytic activities for the double perovskite oxides. For our understanding of photocatalytic performance, we conducted the visible-light active degradation of methylene blue. For the rare-earth based compounds with mixed valence states, we conclude that the photo-induced reduction process is in strong contrast to the oxidative decomposition of 2-propanol with respect to band gap energy. These findings are discussed on the basis of the conduction and valence band edge potentials of a series of the photocatalysts studied here.
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| Free Research Field |
材料科学
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| Academic Significance and Societal Importance of the Research Achievements |
太陽光により効率的に環境浄化や水分解による水素生成を可能とするテクノロジーを支える基盤的研究として本研究成果は少なからず寄与するものと期待される。特に，酸化型および還元型光触媒粒子をハイブリット化することにより，有機物の分解やコロナウイルスの弱毒化にも効果的であると予想できる。このように次世代のエネルギー環境問題を解決する持続可能な世界の構築のイノベーションを創出する。
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