Advanced membranes with high gas separation performances are highly demanded for energy-efficient CO₂ capture. Nonetheless, the ubiquitous “trade-off” relation between permeability and selectivity remains a daunting challenge for currently synthetic membranes. Here, a novel category of pyrazole-based MOF (termed as MOF-303 or Al(OH)HPDC) as nanofillers was firstly blended into the polymer of intrinsic microporosity (PIM-1) matrix to fabricate MOF-303/PIM-1 mixed matrix membranes (MMMs). Owing to their superiorities of CO₂-philic ability, high porosity and suitable aperture sizes, the presence of MOF-303 in membrane could create additional CO₂ transport nanochannels, thus promoting the rapid transport of CO₂ molecules across the blended membrane. As a result, this newly-developed membrane containing 10 wt% MOF-303 nanofilles evince a remarkably high CO₂ permeability of 6602.8 Barrer, with a comparably ideal CO₂/N₂ selectivity of 25.6. This corresponding separation performance far surpasses the most popular 2008 Robeson's upper bond, and approaches the refined 2019 Robeson's upper bond. This study may provide a novel avenue to apply pyrazole-based MOFs in fabricating the facilitated transport membranes applied in industrial CO₂ capture.

具有高气体分离性能的先进膜对于高效的 CO ₂捕集是非常需要的。尽管如此，渗透性和选择性之间普遍存在的“权衡”关系对于目前的合成膜来说仍然是一个艰巨的挑战。在这里，首先将一种新型的吡唑基 MOF（称为 MOF-303 或 Al(OH)HPDC）作为纳米填料共混到固有微孔聚合物（PIM-1）基体中，以制备 MOF-303/PIM-1 混合材料。基质膜（MMM）。由于MOF-303的亲CO ₂能力、高孔隙率和合适的孔径尺寸等优势，MOF-303在膜中的存在可以产生额外的CO ₂传输纳米通道，从而促进CO _{2的快速传输}分子穿过混合膜。结果，这种新开发的含有 10 wt% MOF-303 纳米填料的膜表现出 6602.8 Barrer 的非常高的 CO ₂渗透率，具有相当理想的 CO ₂ /N ₂选择性为 25.6。这种相应的分离性能远远超过了最流行的2008 Robeson的上键，接近了精致的2019 Robeson的上键。本研究可能为应用吡唑基 MOF 制造用于工业 CO ₂捕集的促进传输膜提供新途径。