Zinc Metal-Organic Framework Mimicking of Carbonic Anhydrase for Conversion of CO2 into Calcite

• Published in: Water, air, and soil pollution air, and soil pollution, 2024-02, Vol.235 (2), p.142-142, Article 142
• Main Authors: Nagababu, Penumaka, Kulkarni, Aditi, Chaudhari, Sachin D., Rayalu, Sadhana S.
• Format: Article
• Language: English
• Subjects: Adaptability; air; Aqueous solutions; Atmospheric Protection/Air Quality Control/Air Pollution; Benzene; Biomimetics; Calcite; carbon; Carbon capture and storage; Carbon dioxide; Carbon dioxide fixation; Carbon sequestration; carbonate dehydratase; Carbonation; Carbonic anhydrase; Carbonic anhydrases; Catalysts; Catalytic activity; Climate change; Climate change mitigation; Climate Change/Climate Change Impacts; Comparative analysis; Comparative studies; comparative study; coordination polymers; Direct conversion; Displays; Earth and Environmental Science; Environment; Global temperatures; Heavy metals; Hydrogeology; Imidazole; Metal-organic frameworks; Mineralization; Nickel; soil; Soil Science & Conservation; solvents; surface area; temperature; Thermal stability; Trimesic acid; water; Water Quality/Water Pollution; X ray photoelectron spectroscopy; Zinc
• ISSN: 0049-6979; 1573-2932
• DOI: 10.1007/s11270-024-06918-8

Mineral carbonation in aqueous solutions presents a pragmatic avenue for tackling the challenges associated with carbon capture, utilisation, and storage, particularly in limiting global temperature rise to 1.5 °C for climate change mitigation. The urgency to engineer the removal of atmospheric CO 2 has driven the exploration of innovative methods for direct conversion into valuable products, with a specific emphasis on calcite as a promising approach for carbon dioxide sequestration. This investigation focuses on the biomimetic strategy of emulating the catalytic activity of carbonic anhydrase by synthesizing a zinc-based metal-organic framework. The MOF, synthesized with Zinc as the central metal coordinated by 1,2,3-benzene tricarboxylic acid, displays noteworthy structural adaptability, diversity, and an extensive surface area. The characterisation of synthesised materials through UV DRS, XRD, XPS, FTIR, SEM, and Raman analyses corroborates its structural features. A comparative study with a Nickel-based MOF (Ni-BTC-MOF) underscores the advantages of zinc over nickel in CO 2 mineralisation experiments. Remarkably, Zn-BTC-MOF demonstrates superior catalytic activity, reusability, solvent compatibility, and thermal stability compared to Ni-BTC-MOF. The Zn-BTC-MOF catalyst achieves a mineralisation yield of 25 mg, comparable with the reported results for natural carbonic anhydrase (34.92 mg) and imidazole-carbonic anhydrase (21.55 mg). The Zn-BTC-MOF catalyst displays exceptional reusability, maintaining CO 2 mineralisation activity across over a broad pH and temperature range. These findings underscore the potential of Zn-BTC-MOF as an effective biomimetic catalyst for carbon dioxide mineralisation, holding promising applications in carbon capture and utilization technologies.