高活性ルチル型TiO2光触媒の論文がCatalysts誌に採択されました。 Our paper on highly active rutile TiO2 photocatalysts has been accepted by Catalysts (MDPI).

Highly Active Rutile TiO₂ for Photocatalysis under Violet Light Irradiation at 405 nm

F. Amano, A. Yamamoto, J. Kumagai
Catalysts (MDPI), 12(10), 1079, 2022
https://doi.org/10.3390/catal12101079

Anatase TiO₂ is a widely investigated photocatalyst; however, it can only work under ultraviolet (UV) light with wavelengths less than 390 nm (band gap 3.2 eV). Rutile TiO₂ can absorb visible light at wavelengths less than 410 nm (band gap 3.0 eV); however, its photocatalytic activity is not high. Herein, we activated rutile TiO₂, which was prepared from Evonik TiO₂ P 25 through calcination at 800 °C using hydrogen reduction treatment at 700 °C. The photocatalytic activity of the hydrogen-treated TiO₂ was as high as P 25 under UV irradiation at 380 nm, which was significantly higher than P 25 under violet light irradiation at 405 nm for the oxidative decomposition of acetic acid in water. Electron spin resonance studies indicate that charge separation is enhanced in reduced TiO₂ and their oxygen reduction pathways differ between anatase and rutile. The formation of H₂O₂ was observed on rutile TiO₂; however, it was consumed during photocatalysis to accelerate acetic acid decomposition.