The CO2 adsorption performance of acrylonitrile (AN)-tetraethylenepentamine (TEPA) adduct (hereafter referred to as TN) impregnated adsorbent was greatly enhanced by introduction of Titanium atom into the silica matrix. The adsorbents were characterized by X-ray fluorescence spectrometry (XRF), X-ray diffraction (XRD), transmission electron microscopy (TEM), N-2 adsorption/desorption, UV-vis spectroscopy, Fourier transform infrared (FTIR) spectroscopy. The adsorption experiments together with the physicochemical characterization demonstrated that these adsorbents containing an optimal amount of Titanium (Ti/Si approximate to 0.1) remarkably reinforced the CO2 adsorption capacity and recycling stability. The highest CO2 uptakes reached 4.65 and 1.80 mmol CO2/g adsorbent at 25 degrees C under 90% CO2 (CO2/N-2, 90:10 V/V) and 1% CO2 (CO2/N-2, 1:99V/V) conditions for sample Ti(0.1)-DMS-TN, respectively. Repeated adsorption/desorption cycles revealed that the Ti-incorporated adsorbent showed only a tiny decrease in adsorption capacity (1.778 mmol CO2/g adsorbent after 15 cycles, decreased by 0.95%), significantly enhanced the adsorbent recycling stability. (C) 2014 Elsevier Ltd. All rights reserved.