Fig. 3: Gas permeation performances and diffusion properties of the prepared CMS membranes.
From: Electron-mediated control of nanoporosity for targeted molecular separation in carbon membranes
a Schematic description of turbostratic carbon structure with hypothetical ultramicropore size distribution change before and after electron irradiation. The red-shaded edge of the carbon strands imply oxygen-functionalization and pore compaction. b Permeation data of 500 °C pristine and electron-irradiated CMS membranes for nine gases with respect to kinetic diameter. The black arrows show permeability reduction in electron-irradiated CMS (100 and 250kGy-CMS) compared to the pristine one. C3 gas permeabilities in 250kGy-CMS were not determined due to measurement limit. (error bars indicate the standard deviation at three or four measurements) c C2H4/C2H6 separation performance comparison for 500 °C electron-irradiated CMS membranes and other state-of-the-art membranes. ZIF-8 and MMM represent Zeolitic imidazolate framework-8 and mixed matrix membranes, respectively. d Performance investigation of pyrolysis temperature (500~675 °C) and electron irradiation (50~250 kGy). e C2H4 and C2H6 diffusivities of 500 °C pristine- and electron-irradiated CMS membranes and corresponding diffusion selectivity for C2H4/C2H6. f sp3/sp2 hybridized carbon ratio of pristine and electron-irradiated CMS (100 and 250kGy) with respect to etched depth. g C2H4/C2H6 permeation data of unary and binary (equimolar mixture) systems. Source data are provided as a Source Data file.
