| 초록 |
We have studied a TiO2-mediated dye-sensitized photocatalytic (DSPC) system for CO2 reduction and established its working mechanism in depth, henceforth upgrading its catalytic performance including lifetime. The basic process of photocatalysis is initiated by the visible-light absorption by organic/organometallic dyes, followed by the charge separation and interfacial electron transfer (ET) toward catalytic center occuring on the TiO2 semiconductor surface. Since these reactions primarily occur at the interface between molecular functional components and semiconductor, the ET efficiency between key components significantly affects the overall photochemical reaction kinetics and mechanism. Herein, we report the details of the interfacial ET process between components and discuss the structure-activity relationships based on the relative excited-state energy levels of components. |
