a Single gasoline permeation with the 1-?m-thick g-C3N4 membrane at space temperature and 1??bar. The inset reveals the gas selectivity for H2 in excess of other gases. b Permeance and separation components of the 1-?m-thick g-C3N4 membranes within the equimolar mixed-fuel permeation at home temperature and one??bar. Inset shows the kinetic diamete