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

• Published in: Journal of crystal growth 2013-06, Vol.373, p.96-101
• Main Authors: Sahoo, Prakash C., Jang, Young Nam, Lee, Seung Woo
• Format: Article
• Language: English
• Subjects: A1. Cobalt complex; A2. Metal organic framework (MOF); A3. Carbon dioxide; B1. Calcium carbonate; Calcium carbonate; Carbon capture and storage; Carbon dioxide; Catalysis; Catalysts; Chemistry; Cobalt; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Crystallization; Encapsulation; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; General and physical chemistry; General, apparatus; Materials science; Metal-organic frameworks; Organic compounds; Other materials; Physics; Solid-solid transitions; Specific materials; Specific phase transitions; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Surface physical chemistry
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/j.jcrysgro.2012.11.043

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. ►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.