One pot synthesized Li, Zr doped porous silica nanoparticle for low temperature CO2 adsorption

Abstract Li, Zr doped porous silica was synthesized in one pot and investigated for low temperature CO 2 adsorption. The synthesized nanoparticle was characterized by X-ray diffraction (XRD), N 2 adsorption–desorption measurement, thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The specific surface area, average pore diameter and pore volume were determined to be 962 m 2 /g, 2.3 nm and 0.56 cm 3 /g respectively. ICP-AES analysis revealed a metal content of 4 wt.% (Zr) and 3.42 wt.% (Li). Their CO 2 adsorption capacity was tested at room temperature and atmospheric pressure. An uptake of about 5 wt.% was observed and regenerable at a low temperature of 200 °C. This adsorption and desorption temperature of the sorbent is lower than the reported lithium silicate. The CO 2 adsorption–desorption cyclic performance studies illustrated that Li, Zr doped porous silica is a recyclable, selective and potential sorbent for CO 2 adsorption.