One-Step Synthesis of Solid–Liquid Composite Microsphere for CO₂ Capture

The design and development of efficient adsorbents for CO 2 capture is of paramount importance. Herein, we report a novel Pickering emulsion templating strategy to prepare a hierarchically structured, micrometer-sized solid–liquid composite microsphere (SLCM) for CO 2 capture. This strategy enables us to introduce liquid amine into porous silica nanospheres which are encapsulated by the hydrophobic shell of micrometer-sized sphere through a one-step synthesis. The interior architectures, microsphere sizes, and anime loading can be facilely tuned through varying the synthesis conditions. The developed SLCM exhibits excellent CO 2 adsorption capacity, fast adsorption kinetics, long-term recyclability, and reduced loss of amine in industrially preferred fixed-bed reactors. Interestingly, it was found that the adsorption behavior was dependent on the interior structure of SLCM. This study opens a new way to design efficient solid–liquid composite materials.