Jiang Shuangshuang, Shi Xinli, Sun Fuxing, Zhu Guangshan
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, 130012, P. R. China.
Key Laboratory of Polyoxometalate Science of the Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China.
Chem Asian J. 2020 Aug 3;15(15):2371-2378. doi: 10.1002/asia.202000143. Epub 2020 Apr 27.
Metal-organic frameworks (MOFs)-based membranes have shown great potentials as applications in gas separation. In this work, a uniform membrane based on 2D MOF Ni (HITP) (HITP=2,3,6,7,10,11-hexaaminotriphenylene) was fabricated on ordered macroporous AAO via the filtration method. To fabricate the membrane, we obtained the Ni (HITP) nanosheets as building blocks via a soft-physical exfoliation method successfully that were confirmed by AFM and TEM. We also studied the H , CO and N adsorption isotherms of Ni (HITP) powder at room temperature, which shows Ni (HITP) has high heats of adsorption for CO and high selectivity of CO over N . Gas permeation tests indicate that the Ni (HITP) membrane shows high permeance and selectivity of CO over N , as well as good selectivity of H over N . The ideal separation factors of CO /N and H /N from sing-gas permeances are 13.6 and 7.8 respectively, with CO permeance of 3.15×10 mol⋅m ⋅s ⋅Pa . The membrane also showed good stability, durability and reproducibility, which are of potential interest for practical applications in the CO separations.
基于金属有机框架（MOFs）的膜在气体分离应用中已展现出巨大潜力。在本工作中，通过过滤法在有序大孔阳极氧化铝（AAO）上制备了基于二维MOF Ni（HITP）（HITP = 2,3,6,7,10,11 - 六氨基三亚苯基）的均匀膜。为制备该膜，我们通过软物理剥离法成功获得了作为构建单元的Ni（HITP）纳米片，这通过原子力显微镜（AFM）和透射电子显微镜（TEM）得到证实。我们还研究了室温下Ni（HITP）粉末对H₂、CO₂和N₂的吸附等温线，结果表明Ni（HITP）对CO₂具有高吸附热以及对CO₂相对于N₂的高选择性。气体渗透测试表明，Ni（HITP）膜对CO₂相对于N₂表现出高渗透率和选择性，以及对H₂相对于N₂的良好选择性。单气体渗透率下CO₂/N₂和H₂/N₂的理想分离因子分别为13.6和7.8，CO₂渗透率为3.15×10⁻⁷ mol⋅m⁻²⋅s⁻¹⋅Pa⁻¹。该膜还表现出良好的稳定性、耐久性和可重复性，这对于CO₂分离的实际应用具有潜在意义。
