The search for effective carbon-capture materials has permitted the disclosure and institution of nanoporous fluorinated metal–organic frameworks (MOFs) with a contracted pore system as benchmark CO₂-selective adsorbents. Namely, the SIFSIX-3-M (M = Zn, Cu, and Ni) MOF adsorbents, encompassing a periodic arrangement of fluorine moieties in a confined one-dimensional channels, exhibit a remarkable CO₂ adsorption-based selectivity over CH₄ and H₂ in various industrially related gas mixtures. Here, we report the successful transplantation/integration of this distinctive CO₂ selectivity, distinguishing this class of nanoporous MOF adsorbents to pure MOF membranes for carbon capture. Markedly, the liquid-phase epitaxy (LPE) growth approach permitted, for the first time, the building of continuous, homogeneous, and defect-free MOF membranes based on the SIFSIX-3-M platform, MSiF₆(Pyz)₂ with M = Ni or Cu, on a porous alumina substrate. Single and mixed-gas permeation tests revealed that the resulting nanoporous MOF membrane is a CO₂-selective membrane, exhibiting the foreseen favorable CO₂-selectivity toward carbon dioxide over H₂, and CH₄, governed by the CO₂-selective adsorption in the functional and contracted channels of the SIFSIX-3-M.

中文翻译：

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纳米多孔氟化金属有机骨架膜，用于CO ₂捕集

寻找有效的碳捕集材料已允许披露和建立具有收缩孔系统作为基准CO ₂选择性吸附剂的纳米多孔氟化金属有机骨架（MOF）。即，SIFSIX -3-M（M = Zn，Cu和Ni）MOF吸附剂在一个有限的一维通道中包含氟部分的周期性排列，相对于CH ₄和H具有基于CO ₂吸附的显着选择性。₂在各种与工业相关的气体混合物中。在这里，我们报告了这种独特的CO ₂的成功移植/整合选择性，将此类纳米多孔MOF吸附剂与纯MOF膜区别开来进行碳捕获。值得注意的是，液相外延（LPE）生长方法首次允许基于SIFSIX -3-M平台MSiF ₆（Pyz）₂和M来构建连续，均匀且无缺陷的MOF膜。=在多孔氧化铝基材上的Ni或Cu。单和混合气体渗透试验显示，所得到的纳米多孔MOF膜是CO ₂ -选择性膜，表现出良好的可预见的CO ₂ -选择性朝向二氧化碳较H ₂，和CH ₄，通过CO管辖₂SIFSIX -3-M的功能和收缩通道中的选择性吸附。