Gas Permeation through V2O5 Nanoribbons‐Based Membrane

Abstract Membrane separation processes play a crucial role in gas separation applications, with the need for ongoing development to fulfill new needs for today's challenges. For this purpose, novel 2D nanomaterials are progressively showing promise over conventional polymer‐based membrane material, exhibiting excellent molecular transport properties. Beyond the 2D materials already studied in this field, this article presents the first gas separation performances of vanadium pentoxide membrane. Brand new in gas separation topic, 2D van der Waals nanoribbons of V 2 O 5 are successfully synthesized and layered on an anodic aluminum oxide substrate. Gas permeation analysis of He, N 2 , and CO 2 are performed on various membranes made from different quantities of the nanomaterial. Gas permeance results suggest a deviation from an expected Knudsen diffusion mechanism of the V 2 O 5 ‐based membrane for He separation. The ideal selectivities of He/N 2 and He/CO 2 are compared to Robeson's upper bound for polymeric membranes. V 2 O 5 membranes, prepared with the highest V 2 O 5 quantity, exceeded the upper bound from 2008 for He/N 2 and 2019 (the most recent) for He/CO 2 , demonstrating the interesting potential of V 2 O 5 2D materials for gas separation.