CO2‐Philic Separation Membrane: Deep Eutectic Solvent Filled Graphene Oxide Nanoslits. Issue 49 (23rd October 2019)

• Record Type: Journal Article
• Authors: Lin, Hanqing; Gong, Ke; Ying, Wen; Chen, Danke; Zhang, Jun; Yan, Youguo; Peng, Xinsheng
• Is Part Of: Small. Volume 15:Issue 49(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-10-23
• Subjects: CO2‐philic separation membrane -- deep eutectic solvent -- graphene oxide nanoslits -- nanoconfinement; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201904145
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract : CO2 capture and sequestration is an energy‐intensive industry to deal with the global greenhouse effect. Membrane separation is considered a cost‐effective method to mitigate the emission of CO2 . Though good separation performance and stability have been reported, supported ionic liquid membranes are still not widely applied for CO2 separation due to the high cost. As a novel analogous solvent to ionic liquid, deep eutectic solvent retains the excellent merits of ionic liquid and is cheap with facile preparation. Herein, a highly CO2 ‐philic separation membrane is constructed by nanoconfining choline chloride/ethylene glycol (ChCl/EG) deep eutectic solvent into graphene oxide nanoslits. Molecular dynamic simulation results indicate that the confinement makes a difference to the structure of the nanoconfined ChCl/EG liquid from their bulk, which remarkably facilitates CO2 transport. By tuning the molar ratio of ChCl/EG and thickness of the membrane, the resultant membrane exhibits outstanding separation performance for CO2 with excellent selectivity over other light gases, good long‐term durability, and thermal stability. This makes it a promising membrane for selective CO2 separation. Abstract : A CO2 ‐philic membrane is constructed by filling choline chloride/ethylene glycol (ChCl/EG) deep eutectic solvent into graphene oxide nanoslits (GO‐SDESM), with prominent CO2 selectivity from other light gases (N2, CH4, and H2 ) and excellent stability.