Perovskite-type CsPbBr3 quantum dots/UiO-66(NH2) nanojunction as efficient visible-light-driven photocatalyst for CO2 reduction

Base-on the excellent optoelectronic properties, perovskite CsPbBr 3 quantum dots (QDs) have been used on perovskite solar cells and LED devices, but little research has been focused on photochemical CO 2 reduction due to their poor moisture stability. Coincidentally, metal-organic frameworks (MOFs) materials have received tremendous attention for sustainable clean energy and environmental remediation. However, the design of excellent performed MOFs is still indispensable. Therefore, the CsPbBr 3 QDs/UiO-66(NH 2 ) nanocomposites that combine the advantages of CsPbBr 3 QDs and UiO-66(NH 2 ) have been successfully designed and fabricated for the first time. Then we employ the nanocomposites as photocatalysts to convert CO 2 to chemical fuels in nonaqueous media. The resultant nanocomposites exhibit significantly improved photocatalytic activity for CO 2 reduction. When CsPbBr 3 QDs content is 15 wt%, the amount of CO can reach 98.57 μmol·g −1 . The remarkable photocatalytic performance could be ascribed to the improved electron extraction and transfer between UiO-66(NH 2 ) and CsPbBr 3 QDs, large accessible specific surface area and enhanced visible light absorption capacity. Moreover, the nanojunction shows excellent reusability for photocatalytic CO 2 reduction. This work might supply new pathway to utilize halide perovskite QDs/MOF nanocomposite in energy conversion and environmental remediation.