The greenhouse effect associated with excessive CO emission has led to a series of environmental issues, thus developing excellent adsorbents for CO capture from flue gas offers a sustainable approach. To combine the merit of multiple functional components, novel FeTPP@MIL-101(Cr) was prepared by incorporation of 5,10,15,20-tetrakis(4-methylphenyl)porphyrinato iron (III) chloride (FeTPP) into MIL-101(Cr) cages via in-situ packaging strategy. The cage-confined FeTPP can both regulate the pore structures of MIL-101(Cr) and provide additional binding sites for CO adsorption. Profiting from extra interactions for CO component and the “sieving effect” for N component induced by incorporation of FeTPP, the discrepancy of isosteric heat for CO and N was largely amplified. Notably, the CO/N selectivity (15/85, /) calculated by ideal adsorbed solution theory (IAST) increased from 17.1 (MIL-101 (Cr)) to 41.8 (FeTPP@MIL-101 (Cr) with FeTPP loading of 4.98 wt%) at 273 K, 100 kPa, which is 2.44 times larger than that of pristine MIL-101 (Cr) and also exceeds most reported adsorbents.

中文翻译：

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将 5, 10, 15, 20-四（4-甲基苯基）氯化卟啉铁 (III) 氯化物 (FeTPP) 分子封装到 MIL-101(Cr) 中，实现卓越的 CO2/N2 分离性能


与过量二氧化碳排放相关的温室效应导致了一系列环境问题，因此开发优良的吸附剂来捕获烟气中的二氧化碳提供了一种可持续的方法。为了结合多种功能成分的优点，通过将5,10,15,20-四(4-甲基苯基)卟啉铁(III)氯化物(FeTPP)掺入MIL-101中，制备了新型FeTPP@MIL-101(Cr)。 (Cr)笼通过原位包装策略。笼状 FeTPP 既可以调节 MIL-101(Cr) 的孔结构，又可以为 CO 吸附提供额外的结合位点。得益于CO组分的额外相互作用以及FeTPP掺入引起的N组分的“筛分效应”，CO和N的等量热差异被大大放大。值得注意的是，通过理想吸附溶液理论 (IAST) 计算的 CO/N 选择性 (15/85, /) 从 17.1 (MIL-101 (Cr)) 增加到 41.8 (FeTPP@MIL-101 (Cr)，FeTPP 负载量为 4.98 wt%）在 273 K、100 kPa 下，比原始 MIL-101 (Cr) 大 2.44 倍，也超过了大多数报道的吸附剂。