Engineering Sub-Nanometer Channels in Two-Dimensional Materials for Membrane Gas Separation

Abstract

Sub-nanochannels constructed by stacking two-dimensional (2D) nanosheets in parallel provide a unique molecular separation pathway with excellent size-sieving ability for membrane gas separation. Herein we review the progress in engineering these 2D channels for efficient gas separation including graphene, graphene oxide (GO), molybdenum disulfide (MoS2), and MXene. Mixed matrix materials containing these 2D materials in polymers are also reviewed and compared with conventional polymers for gas separation.

Keywords

• graphene oxide
• two-dimensional materials
• membranes for gas separation
• mixed-matrix materials