Synergistic Effect of CdS and NH2-UiO-66 on Photocatalytic Reduction of CO2 under Visible Light Irradiation

Photocatalytic reduction of CO2 has drawn much attention as a promising way that can effectively alleviate the issue of global warming and energy crisis. In this work, we fabricated a series of CdS/NH2-UiO-66 composites with varied CdS amounts and tested their capacity for photocatalytic reduction of CO2. The reactions were performed in a solvent-free system and displayed excellent selectivity for CO production without liquid phase products. When the content of CdS in the composite is up to 40 %, the hybrid catalyst produces 105.41 mu mol/g within 6 h, exhibiting remarkable photocatalytic performance, which is much higher than that catalyzed by mechanically mixed CdS and NH2-UiO-66. The brilliant catalytic performance of the composite catalyst is attributed to the formation of heterostructure between the well-dispersed CdS and NH2-UiO-66, which promotes the enhancement of electron transfer during photocatalysis.