title: Bicontinuous zeolitic imidazolate framework ZIF-8@GO membrane with enhanced hydrogen selectivity.
abstract: Through layer-by-layer (LBL) deposition of a graphene oxide (GO) suspension on a semicontinuous ZIF-8 layer, we have developed a novel bicontinuous ZIF-8@GO membrane. Since only the gaps between the ZIF-8 crystals are sealed by the GO layer due to capillary forces and covalent bonds, the gas molecules can only permeate through the ZIF-8 micropore system (0.34 nm). Therefore, the ZIF-8@GO membranes show high hydrogen selectivity. At 250 °C and 1 bar, the mixture separation factors of H2/CO2, H2/N2, H2/CH4, and H2/C3H8 are 14.9, 90.5, 139.1, and 3816.6, with H2 permeances of about 1.3 × 10(-7) mol·m(-2)·s(-1)·Pa(-1), which is promising for hydrogen separation and purification by molecular sieving.
authors.affiliation: Institute of New Energy Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences , 1219 Zhongguan Road, 315201 Ningbo, P. R. China.
authors.forename: Aisheng
authors.initials: A
authors.lastname: Huang
authors.forename: Qian
authors.initials: Q
authors.lastname: Liu
authors.forename: Nanyi
authors.initials: N
authors.lastname: Wang
authors.forename: Yaqiong
authors.initials: Y
authors.lastname: Zhu
authors.forename: Jürgen
authors.initials: J
authors.lastname: Caro