A thermally derived and optimized structure from ZIF-8 with giant enhancement in CO2 uptake

Post-synthesis thermal annealing of ZIF-8 close to its framework decomposition temperature below 550 °C results in a modified structure with highly enhanced and stable cyclic CO₂ adsorption capacity of over 1.5 mmol g⁻¹ at 25 °C and 1 bar of CO₂, which is over 100% greater than that of initial ZIF-8.