2020 Fiscal Year Final Research Report

Development of mixed anion compounds that exhibit new properties and functions

Planned Research

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Project Area	Synthesis of Mixed Anion Compounds toward Novel Functionalities
Project/Area Number	16H06441
Research Category	Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
Allocation Type	Single-year Grants
Review Section	Science and Engineering
Research Institution	Tokyo Institute of Technology
Principal Investigator	Maeda Kazuhiko 東京工業大学, 理学院, 准教授 (40549234)
Co-Investigator(Kenkyū-buntansha)	長谷川哲也東京大学, 大学院理学系研究科(理学部), 教授 (10189532) 田部勢津久京都大学, 人間・環境学研究科, 教授 (20222119) 松石聡東京工業大学, 元素戦略研究センター, 准教授 (30452006) 内本喜晴京都大学, 人間・環境学研究科, 教授 (50193909) 森孝雄国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, グループリーダー (90354430) 牛山浩東京大学, 大学院工学系研究科(工学部), 准教授 (40302814)
Project Period (FY)	2016-06-30 – 2021-03-31
Keywords	光触媒 / 二次電池 / 蛍光体 / 磁性体 / 熱電材料
Outline of Final Research Achievements	We have attempted to create innovative functions unique to mixed anion compounds, targeting applications in photocatalysts and photoelectrodes, secondary battery components, phosphors, and electronic materials. In the study of energy-conversion-type photocatalysts, we found that anion-doped titanium dioxide, layered oxynitrides, and oxyfluorides, which had not been candidates for investigation due to technical issues and preconceptions, could be new visible light responsive photocatalysts. Some of the anion-doped oxides were also shown to be effective as secondary battery materials. For phosphor materials, we have established a guideline for controlling excitation and emission wavelengths that is not limited to material systems through band control by anion coexistence. In the study of electronic materials, unique electronic properties associated with complex anionization were observed in many systems.
Free Research Field	光触媒・材料科学
Academic Significance and Societal Importance of the Research Achievements	本研究により、1:1のグループ間共同研究だけでなく、合成（A01）、解析（A02）を含めた3グループ以上による有機的な連携に基づいた共同研究が活発に行われ、複合アニオン化合物の機能創出に関して多くの学術的知見を得ることに成功した。また、実用化に向けた研究が進む光触媒や二次電池材料に関しては、既存のチャンピオン物質に匹敵するものを複数見い出すことができた。