Zeolitic Imidazolate Framework-8 (ZIF-8) membranes have shown great potential for effective separation of industrially important propylene/propane gas mixtures. In this work, we coated the silicalite seed nanoparticles on the anodic alumina oxide (AAO) substrate in order to increase membrane-substrate bonding. ZIF-8 membrane was synthesized on a silicalite-seeded AAO substrate by secondary growth method. It was found that high quality ZIF-8 membrane was fabricated due to strong attachment of silicalite seed crystals to AAO substrates through hydrogen bonding. Moreover, when ZnCl₂ was used as the Zn source, the ZIF-8 layer was formed with larger ZIF-8 crystal size and a more intergrown surface than the layer in which ZnNO₃ was used. An excellent propylene/propane separation factor of 170 was obtained in a silicalite-seeded ZIF-8 membrane with ZnCl₂, which is twice that of a ZIF-8 membrane synthesized without the seeding process, and which is 3.6 times higher than a silicalite-seeded ZIF-8 membrane with ZnNO₃.

沸石咪唑盐骨架8（ZIF-8）膜已显示出有效分离工业上重要的丙烯/丙烷气体混合物的巨大潜力。在这项工作中，我们将硅沸石晶种纳米颗粒涂覆在阳极氧化铝（AAO）基底上，以增加膜与基底之间的键合。ZIF-8膜是通过二次生长法在硅沸石播种的AAO基底上合成的。发现高质量的ZIF-8膜是由于硅质晶种通过氢键牢固结合到AAO基底上而制成的。此外，当使用ZnCl ₂作为Zn源时，形成的ZIF-8层比其中的ZnNO ₃层具有更大的ZIF-8晶体尺寸和更大的共生表面。被使用了。在带有ZnCl ₂的硅沸石播种的ZIF-8膜中，获得了170的优异的丙烯/丙烷分离系数，这是未经接种工艺合成的ZIF-8膜的两倍，是硅沸石-膜的3.6倍。用ZnNO ₃接种ZIF-8膜。