Nanoconfined deep eutectic solvent in laminated MXene for efficient CO2 separation

CO 2 separation and recovery technology is a significant part of resolving the global greenhouse issue. In order to develop a cost-effective and high-performance method to realize CO 2 separation, a new kind of supported liquid membrane was configured by incorporating deep eutectic solvent into the nanoslits of titanium carbide (Ti 3 C 2 T x ) membrane. The deep eutectic solvent is a novel ionic liquid analogous with equal physical and chemical advantages but more economical and environmental benign. And the Ti 3 C 2 T x , as a neoteric two-dimension material, can serve as a valid platform for supporting the deep eutectic absorbent. By combining the two kinds of material, the resultant Ti 3 C 2 T x supported deep eutectic liquid membrane shows good CO 2 preference against other light gases as well as high thermal stability and long-term durability. The permeance of CO 2 is about 26.35 GPU with selectivity over N 2 , CH 4 and H 2 are 319.15, 249.01 and 12.38, respectively. The molecule dynamic simulation is also applied to uncover the separation mechanism of CO 2 and the ingredient redistribution and interionic refactor phenomenon of deep eutectic solvent trapped in the Ti 3 C 2 T x nanoslits.