Carbonic Anhydrase‐Embedded Hydrogen‐Bonded Organic Frameworks Coating for Facilitated Offshore CO₂ Fixation

Abstract

Exhausted emission of carbon dioxide (CO 2 ) from ships or offshore platforms has become one of the major contributors to global carbon emissions. Enzymes such as carbonic anhydrase (CA) have been widely used for CO 2 mineralization because of their high catalytic rate. However, CA in seawater is easy to inactivate and difficult to reuse. Immobilization would be a feasible solution to address the stability issue, which, however, may cause an increase of internal diffusion resistance and reduced catalytic activity. In this regard, design of highperformance biocatalysts for acquiring high catalytic activity and stability of CA is highly desirable. Herein, a monolithic catalyst of Filler-CA@Lys-HOF-1 (FCLH) was prepared by chem-ical sorption of CA on the surface of the Filler followed by the coating of Lys-HOF-1. The highest catalytic activity of FCLH was obtained by regulating the amount of HOF-1 monomer added. Due to the protection of Lys-HOF-1, the FCLH showed good tolerance against acidity and salinity, which could retain about 80.2 % of the original activity after 9 h incubation in simulated seawater. The catalytic activity of FCLH could retain 85.4 % of the initial activity after 10 cycles. Hopefully, our study can provide a promising biocatalyst for CO 2 mineralization, which may drive down carbon emissions when used for CO 2 capture and conversion on offshore platforms.

Functional Composite Materials Based on Hydrogen-Bonded Organic Frameworks

“…NSC@PCN/RA/HOF transplantation into the hippocampus alleviated AD-related symptoms in a triple transgenic Alzheimer’s disease mouse model (3×Tg-AD), including increased neurogenesis and decreased cognitive impairment. This NIR-II degradable HOF-based exoskeleton has broad applications. − …”

Latest progress in proton-conducting hydrogen-bonded organic frameworks

“…So far, a variety of H-bonded units, covering diaminotriazine (DAT), carboxylate, azacyclo-units, and other units, have been employed to construct porous and stable HOFs. HOFs are widely used as emerging multifunctional substances in gas storage and separation, 67–70 molecular sensing, 71–74 heterogeneous catalysis, 75–78 biological applications, 79–81 photoluminescent materials, 82–86 proton conduction 87–92 and membrane-based applications. 93–96 To date, although there have been some reviews on the preparation and application of HOFs, 97–101 reviews on proton conductivity are relatively rare.…”