an individual fuel permeation from the one-?m-thick g-C3N4 membrane at room temperature and 1??bar. The inset displays the fuel selectivity for H2 more than other gases. b Permeance and separation things of your 1-?m-thick g-C3N4 membranes in the equimolar mixed-fuel permeation at room temperature and 1??bar. Inset displays the kinetic diameters of