a Single gas permeation of your one-?m-thick g-C3N4 membrane at space temperature and one??bar. The inset reveals the gas selectivity for H2 over other gases. b Permeance and separation factors of your 1-?m-thick g-C3N4 membranes during the equimolar blended-fuel permeation at area temperature and 1??bar. Inset displays the kinetic diameters of ass