Mg–O–F Nanocomposite Catalysts Defend against Global Warming via the Efficient, Dynamic, and Rapid Capture of CO(2) at Different Temperatures under Ambient Pressure

[Image: see text] The utilization of Mg–O–F prepared from Mg(OH)(2) mixed with different wt % of F in the form of (NH(4)F·HF), calcined at 400 and 500 °C, for efficient capture of CO(2) is studied herein in a dynamic mode. Two different temperatures were applied using a slow rate of 20 mL·min(–1) (100%) of CO(2) passing through each sample for only 1 h. Using the thermogravimetry (TG)-temperature-programed desorption (TPD) technique, the captured amounts of CO(2) at 5 °C were determined to be in the range of (39.6–103.9) and (28.9–82.1) mg(CO(2))·g(–1) for samples of Mg(OH)(2) mixed with 20–50% F and calcined at 400 and 500 °C, respectively, whereas, at 30 °C, the capacity of CO(2) captured is slightly decreased to be in the range of (32.2–89.4) and (20.9–55.5) mg(CO(2))·g(–1), respectively. The thermal decomposition of all prepared mixtures herein was examined by TG analysis. The obtained samples calcined at 400 and 500 °C were characterized by X-ray diffraction and surface area and porosity measurements. The total number of surface basic sites and their distribution over all samples was demonstrated using TG- and differential scanning calorimetry-TPD techniques using pyrrole as a probe molecule. Values of (ΔH) enthalpy changes corresponding to the desorption steps of CO(2) were calculated for the most active adsorbent in this study, that is, Mg(OH)(2) + 20% F, at 400 and 500 °C. This study’s findings will inspire the simple preparation and economical design of nanocomposite CO(2) sorbents for climate change mitigation under ambient conditions.