Enhanced biomimetic CO2 sequestration and CaCO3 crystallization using complex encapsulated metal organic framework

A new biomimetic complex (Co-BBP) that mimics the active site of carbonic anhydrase (CA) was prepared by the coordination of cobalt (II) with 2, 6-bis(2-benzimidazolyl) and was encapsulated into a metal organic framework (Co-BBP@Tb-MOF). Carbon dioxide (CO2) sequestration was carried out via an in vitro mineralization approach using these biomimetic catalysts. The biomimetic catalysts were expected to enhance CO2 hydration and calcium carbonate (CaCO3) crystallization based on the same mechanism as that of CA.

Research highlights►A Cobalt complex (Co-BBP) was prepared to mimic the active site of carbonic anhydrase. ► The activity of Co-BBP was enhanced after encapsulation in a metal organic framework (MOF). ► Co-BBP@MOF showed superior activity for CO2 hydration. ► In-vitro crystallization suggested that Co-BBP@Tb-MOF dramatically alter CaCO3 morphology.