Nanowerk October 24, 2024
The development of a durable material with high capacity, fast kinetics and low regeneration temperature for CO2 capture, especially from the intricate and dynamic atmosphere, is still lacking. An international team of researchers (USA – University of California, Saudi Arabia, Germany) synthesized a porous, crystalline covalent organic framework (COF) with olefin linkages structurally characterized and post-synthetically modified by the covalent attachment of amine initiators for producing polyamines within the pores. The COF could capture CO2 from open air with a capacity of 0.96 mmol g–1 under dry conditions and 2.05 mmol g–1 under 50% relative humidity, both from 400 ppm CO2. It was tested for more than 100 adsorption–desorption cycles in the open air of Berkeley, California, and found to fully retain its performance. According to the researchers COF-999 is an exceptional material for the capture of CO2 from open air as evidenced by its cycling stability, facile uptake of CO2 and low regeneration temperature (60 °C)… read more. TECHNICAL ARTICLEÂ
Design strategy and synthesis of COF-999. Credit: Nature, 23 October 2024