Three-dimensional pi conjugated metal organic framework material, preparation method thereof and application of three-dimensional pi conjugated metal organic framework material in photocatalytic carbon dioxide reduction

The invention discloses a three-dimensional pi-containing conjugated metal organic framework material as well as a preparation method and application thereof in photocatalytic carbon dioxide reduction, MOFs (Metal Organic Frameworks) take triphenyl ligands modified by different functional groups and having high pi conjugacy as a construction unit, the MOFs and Fe ions are synthesized into the MOFs, and a second type of metal ions are introduced for modification, so that the three-dimensional pi-containing conjugated metal organic framework material is obtained. A second catalytic site is formed to play a role in concerted catalysis; meanwhile, substituent groups on the organic ligands further effectively regulate and control the light absorption and photo-induced electron separation capacity of the MOFs material, and the photocatalytic performance of the MOFs material is improved. Wherein FeNiL-OH has good performance of photocatalytic carbon dioxide reduction, the CO rate of FeNiL-OH reaches 2909 [mu] mol g