Fig. 2: Chemistry and pore structures of sMMM CMS membranes.
From: Hierarchically porous and single Zn atom-embedded carbon molecular sieves for H2 separations
Effect of the carbonization temperature (Tc) on (a) the N/C molar ratio, (b) N 1 s spectra, and (c) the ratio of graphitic N to pyridinic-N determined by x-ray photoelectron spectroscopy (XPS). d Skeletal density, bulk density, and porosity. e Pore volume and pore surface area, and (f) pore size distributions obtained by non-local density functional theory (NLDFT) from CO2 sorption at 0 °C. Note: Tc = 23 °C in Fig. c–f represents the sMMM precursor. Error bars in Fig. a, d are standard deviations from 3 samples.
