▎ 摘　　要

Graphitic carbon nitride-graphene oxide (g-C3N4/GO) composite membranes were fabricated via filtrating g-C3N4 and a small amount of GO on a porous polymer support. GO nanosheets were incorporated in g-C3N4-based membranes to prevent interedge defects or voids from forming. Accordingly, the selective molecular sieving pores and interlayer channels of g-C3N4 can effectively separate H-2 molecules from larger gas molecules (CH4, N-2, O-2, and CO2). When the GO weight loading reaches 5%, the g-C3N4/GO composite membrane shows an enhanced H-2/CO2 separation performance with a H-2 permeance of 3.66 X 10(-6) mol m(-2) s(-1) Pa-1 (H-2/CO2 ideal selectivity: 179.6).