Efficient CO_2 Capturer Derived from As-synthesized Mesoporous Silica Modified with Amines

Solid amine adsorbents have the advantages of high selectivity,low causticity,and easy regeneration,and therefore they have potential applications in reducing emission of CO2.However,how to incorporate a large amount of amine onto the porous host material and how to keep the guest well dispersed and distributed are crucial for the development of solid amine adsorbents.In this article,the progresses on the design and preparation of solid amine adsorbents are reviewed.Because the channels of the as-synthesized mesoporous silica are divided into sub-nanometer interstice by template micelles to have a kind of hierarchical structure,the template in the as-synthesized mesoporous silica is used as the support to disperse amine,directly introducing tetraethylenepentamine or diethanolamine into the porous host to develop a novel CO2 capturer.Originating from the specific interaction of the template with amine,the resulting composites possess a high capacity in CO2 adsorption.