Preparation and Characterization of Amine-Functionalized Mesoporous Hollow Silica for CO₂ Capture.

Mesoporous hollow silica material (MHS) was synthesized using polystyrene as a template. Later, it was modified by wet impregnation with tetraethylenepentamine (TEPA) as a solid adsorbent for CO₂ capture. Transmission electron microscopy (TEM), X-ray diffraction (XRD), IR, and TGA were used to characterize the average diameter, shell thickness, crystalline structure, and TEPA load of the prepared adsorbents. An increase in the amount of loaded TEPA, improved the CO₂ adsorption capacity of the prepared adsorbents. The highest CO₂ adsorption capacity was obtained using a 50 wt% TEPA load (AMHS-50).