CdSe/ZIF-8- x : synthesis and photocatalytic CO 2 reduction performance.

The photocatalytic reduction of CO 2 is an effective way to solve the greenhouse effect. Different kinds of materials, such as semiconductors, coordination compounds, and bioenzymes, have been widely investigated to increase the efficiency of the photocatalytic reduction of CO 2 . However, a high selectivity and great stability are still challenges for material scientists. Here, we report for the first time visible light photocatalytic CO 2 reduction by a series of CdSe/ZIF-8 nanocomposites combining the excellent CO 2 adsorption capacity of ZIF-8 and the narrow energy gap of CdSe quantum dots (QDs). The composites show a higher catalytic performance than those of the pure components. Among CdSe/ZIF-8- x ( x = n CdSe / n ZIF-8 ), the highest yield (42.317 μmol g -1 ) for reducing CO 2 to CO in 12 h, was obtained using nanocomposites with a ratio of 0.42 ( n CdSe / n ZIF-8 ) within the range of investigation.