Amino-functionalized magnetic nanoparticles for CO₂ capture

CO2 accumulation is inducing an effect of global warming. Adsorption using solid sorbents proving as effective strategy for capture and reuse. The aim this study was to develop amino-functionalized magnetic nanoparticles by depositing various amines through co-precipitation or impregnation-sonication. Structural characteristics were studied SEM, BET XRD analyses, evidencing coarse particles with low crystallinity surface areas 100–150 m2 g−1, while FT-IR confirmed interacting substrate. load functional group, stability, sorption capacity assessed elemental thermogravimetric analysis. It found that loads groups ranging from 1.6 6.1 wt.%. deposited, most samples showed sound stability up 100°C. Sorption capacities in the range 0.2–1.5 g gNH2−1, highest being 1.46 gNH2−1 ɛ-aminocaproic acid. Such sample also exhibited good recyclability, a performance drop 11% after many cycles. uptake decreased increasing temperature 25–45°C, suggesting chemical bond between amines. Amino functionalized could thus be interesting solution utilization thanks fast kinetics, ease separation.