only one gas permeation with the one-?m-thick g-C3N4 membrane at room temperature and one??bar. The inset shows the gas selectivity for H2 over other gases. b Permeance and separation things from the 1-?m-thick g-C3N4 membranes while in the equimolar blended-fuel permeation at room temperature and one??bar. Inset exhibits the kinetic diameters of a