Abstract
Achieving selective photocatalytic conversion of CO2 in an aqueous solution is challenging owing to the generation of hydrogen as a typical by-product. Herein, a visible light-driven CO2 conversion system was developed using Co(bpy)2Cl2 as the catalyst and Acriflavine (Acr) as the photosensitizer (PS). At the optimal ratio, under visible light irradiation, the system achieved high selective CO2 conversion to CO (∼100 %) in an aqueous acetonitrile solution, with a turnover number (TON) of 100 and a maximal turnover frequency (TOF) of 90 h−1. Deeply studies reveal that the -NH2 of Acr plays a vital effect on the selectivity of this photocatalytic CO2 conversion system. The unique combination of Co(bpy)2Cl2 and Acr provides an ideal platform for designing highly selective photocatalytic systems for CO2 reduction.
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