CdS/ZIF-67 Nanocomposites with Enhanced Performance for Visible Light CO2 Photoreduction

Zeolitic imidazolate framework-67 (ZIF-67) has emerged recently as a new type of photocatalyst for CO2 reduction, mainly owing to its excellent CO2 uptake capacity and unique crystal topological property. However, there are still limitations and challenges on the application of ZIF-67 in CO2 reduction, such as the low selectivity and poor stability. In this work, a novel CdS/ZIF-67 nanocomposites obtained via a relatively simple route shows improved CO2 reduction capacity than pure ZIF-67. The photocatalytic performance of CdS/ZIF-67 with different CdS loading (the ncds/nZIF 67 ranges from 2.0 to 3.2) was investigated, and 3.0CdS/ZIF-67 exhibited the highest yield and excellent selectivity for reducing CO2 to CO, whose selectivity almost 4 times that of ZIF-67 and CO production rate is up to 183.964 mu mol g(-1). The deeper characterization study results such as XPS, UV-vis DRS confirmed the synergistic effect between CdS and ZIF-67, which is proposed to have greatly contribution on the selective reduction of CO2.