Pickering interfacial biocatalysis with enhanced diffusion processes for CO2 mineralization

Utilization of carbon dioxide (CO2) has become a crucial and anticipated solution to address environmental ecological issues. Enzymes such as carbonic anhydrase (CA) can efficiently convert CO2 into various platform chemicals under ambient conditions, which offers promising way for utilization. Herein, we constructed Pickering interfacial biocatalytic system (PIBS) stabilized by CA-embedded MOFs (ZIF-8 ZIF-L) mineralization. Through structure engineering incorporation emulsion, the internal external diffusion processes during enzymatic mineralization were greatly intensified. When was ventilated at flow rate 50 mL min–1 1 h, pH value PIBS dropped from ~8.00 ~6.50, while average free only ~7.15, indicating that initial reaction is nearly twice system. After 8th cycle reaction, still produce more than 9.8 mg CaCO3 in 5 min, realizing efficient continuous CO2.