Colloidal Formamidinium Lead Bromide Quantum Dots for Photocatalytic CO2 Reduction

Abstract With the target of bringing out a sustainable carbon-neutral system, halide perovskite materials have been explored to fulfil the requirements of solar-to-fuel conversion. Herein, formamidinium (CH(NH2)2+) lead bromide quantum dot (FAPbBr3 QD) as a novel of photocatalytic material is researched, which exhibits an excellent photostability and the optimum CO yield rate of 181.25 μmol·g-1·h-1 towards photocatalytic CO2 reduction in the mixed solvent of deionized water/ethyl acetate. Furthermore, the kinetic features of exciton bleach and photoluminescence spectra infer that FAPbBr3 QDs have an enough lifetime to separate and transfer charges for adsorbing CO2 molecules, thus facilitating the photocatalytic CO2 reduction. This study puts forward a reliable avenue of organic-inorganic hybrid perovskite materials as efficient photocatalysts to convert CO2 into valuable chemical fuels.