an individual gas permeation with the one-?m-thick g-C3N4 membrane at space temperature and one??bar. The inset displays the fuel selectivity for H2 about other gases. b Permeance and separation aspects from the 1-?m-thick g-C3N4 membranes during the equimolar combined-gas permeation at home temperature and one??bar. Inset exhibits the kinetic diam