A disordered mesoporous silica was found to be a promising solid support for CO2 capture. It was prepared with a process similar to that for MCM-41. X-ray diffraction characterization.(XRD) and transmission electron microscopy (TEM) confirmed its disordered structure. N-2 adsorption-desorption tests indicated that its average pore size is significantly larger than that of MCM-41. On this support was deposited acrylamide (AM) modified tetraethylenepentamine " (TEPA), resulting in an adsorbent suitable for CO2 capture. This material exhibited well balanced adsorption and desorption properties. Substantially higher CO2 adsorption capacity (159.1 mg/g-adsorbent) was obtained With pure CO2 at 25 degrees C, and satisfactory stability during 12 adsorption-desorption turnovers was achieved.