中文摘要：

本研究利用廉价过渡金属锰配合物fac-Mn（bpy）（CO）3Br和四苯基卟啉锌（ZnTPP）在可见光下催化还原CO_2.结果表明,在可见光环境下,该体系能够有效地将CO_2选择性转化为CO,而随着ZnTPP的浓度的增大,CO_2的光催化还原产物CO的产生速率和产量均有增大.当Mn（bpy）（CO）3Br与ZnTPP的浓度比为1∶2时,产物CO的转化值TON达到97.

英文摘要：

Visible light-driven photocatalytic reduction of CO_2 has been investigated using abundant metal complex（fac-Mn（bpy）（CO）_3Br）as catalyst and ZnTPP as photosensitizer.This photocatalytic system demonstrated high efficiency and selectivity for reducing CO_2 to CO.Increasing ZnTPP concentration led to enhanced production rate and CO yield.Notably,TONCOcould reach 97 with a catalyst：photosensitizer concentration ratio of 1∶2.