[19p-C301-1~14] 9.5 新機能材料・新物性

13:45 〜 14:00奨励賞エントリー英語発表

[19p-C301-2] Boosting CO₂ Reduction Reaction via Synergistic Photo-Piezocatalysis in Ag-Doped BaTiO₃/TiO₂ Heterostructures

〇(B)YenChang Chen¹, TingHan Lin¹, KuoPing Chiang¹, JiaMao Chang¹, MingChung Wu¹ (1.Chang Gung Univ.)

キーワード：

Carbon Dioxide Reduction Reaction、Photo-Piezocatalyst、Heterostructures

With global warming on the rise, controlling carbon dioxide emissions is crucial. This study proposes using piezo-photocatalysts that harness sustainable energy sources, like mechanical energy from rivers and sunlight, for the carbon dioxide reduction reaction (CO₂RR). We designed a heterostructure catalyst based on the photocatalytic properties of silver-doped titanium dioxide (Ag-doped TiO₂) and the piezocatalytic properties of barium titanate (BaTiO₃, BTO) using hydrothermal methods. By precisely tailoring the Ag-doped BTO/TiO₂ heterostructures and adjusting their morphologies and crystal structures, we enhanced their CO₂RR performance. The optimized heterostructure shows significantly improved CO₂RR performance under UV light and ultrasonic vibration, achieving a CO yield of 7.29 μmol/g·h, which is 3.90 times and 5.40 times higher than the yields from individual photocatalysis and piezocatalysis, respectively. The synergistic effects of BTO and Ag-doped TiO₂ effectively integrate charge transfer pathways, accelerating the catalytic reaction and serving as a nanogenerator.