This study demonstrates that the interlayer galleries of layered compounds can exhibit size selectivity. A compact NiAl-CO3 layered double hydroxide membrane was prepared showing a selectivity of ∼80 for the H2–CH4 mixture. The use of the γ-Al2O3 modified α-Al2O3 substrate and CO2-saturated water solvent was essential for high-quality membrane fabrication.
Y. Liu, N. Wang, Z. Cao and J. Caro, J. Mater. Chem. A, 2014, 2, 1235 DOI: 10.1039/C3TA13792A
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