Development of layered oxyhalide photocatalysts with "thick" fluorite layer

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K20556
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0502:Inorganic/coordination chemistry, analytical chemistry, inorganic materials chemistry, energy-related chemistry, and related fields
• Research Institution: Kyoto University
• Principal Investigator: Kato Daichi 京都大学, 工学研究科, 助教 (40906921)
• Project Period (FY): 2021-08-30 – 2023-03-31
• Keywords: 光触媒 / 酸塩化物 / 複合アニオン

Outline of Final Research Achievements

The layered oxyhalide family has recently attracted much attention as candidates for highly efficient and stable water-splitting photocatalysts. Since their electronic states are dominated by double-fluorite layers such as Bi2O2, this study focused on the expansion of the fluorite layers (development of thicker fluorite layers) to design more efficient layered oxychloride photocatalyst. Representative research achievements include desingning photocatalytic properties of Bi2MO4Cl (M = Y, La, Bi) with three-layer fluorite layers by various cation doping and solid solution formation, and discovery of a new structure with sextuple fluorite-like blocks.

Free Research Field

固体化学

Academic Significance and Societal Importance of the Research Achievements

水分解光触媒は、クリーンでサスティナブルな水素生成方法として注目を集めている。今回我々は、近年高効率な光触媒として注目されている酸塩化物光触媒において、蛍石ブロックの拡張に着目した新しい物質設計の方針によって、複数の新規酸塩化物型光触媒の設計に成功した。この成果は、今後の高効率な光触媒開発につながることが期待できる。