17:00 〜 17:15
▲ [5p-A410-11] TiO2-based nanocomposites with metallic nanostructures on nanobranched substrate for photocatalytic water splitting
キーワード：plasmonic, photocatalyst, photoactivity
Plasmon-induced photocatalyst has found its application in the clean and renewable energy issue due to its combination of the large absorption and resonance in the visible region for plasmonic nanostructures with the ability of producing the electron-hole pairs in the ultraviolet range for semiconductors (e.g., TiO2). In this study, Au and Ag nanotriangles synthesized by reduction of metal precursor were deposited on the surface of nanobranched TiO2 arrays, which were prepared by hydrothermal methods. The photoactivity enhancement was evaluated using three-electrode system illuminated with the solar simulator. Photoactivity behaviors with silver and gold nanotriangles chemically deposited on the surface of nanobranched TiO2 electrode were found to be better than the bare TiO2. Plasmonic resonant characteristic of subwavelength metal nanoparticles was believed to enhance the photocatalytic efficiency of photocatalyst through hot electron transfer.