Enhancing the separation efficiency of a C2H2/C2H4 mixture by a chromium metal–organic framework fabricated via post-synthetic metalation†,Journal of Materials Chemistry A

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Enhancing the separation efficiency of a C2H2/C2H4 mixture by a chromium metal–organic framework fabricated via post-synthetic metalation†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-01-03 , DOI: 10.1039/c9ta06913e
Fan Yu _{1,

2,

3,

4,

5} , Bing-Qian Hu _{1,

2,

3,

4,

5} , Xiao-Ning Wang _{4,

5,

6,

7,

8} , Yu-Meng Zhao _{4,

5,

6,

7,

8} , Jia-Luo Li _{9,

10,

11,

12} , Bao Li _{4,

5,

6,

7,

8} , Hong-Cai Zhou _{9,

10,

11,

12}

Affiliation

Chromium metal–organic frameworks (MOFs) are well-known for their stable porous frameworks, which are not fully explored due to the difficulty encountered in the synthesis process. In order to investigate the possibilities of Cr-MOFs as separation materials towards C₂ guest molecules, a novel iron MOF was constructed, which could serve as the scaffold to fabricate Cr-MOFs via post-synthetic metalation. The corresponding gas adsorption properties of the two iso-structural MOFs had been systematically investigated, illustrating the potential separation ability of Cr-MOF with respect to CO₂/C₂H₂ and C₂H₂/C₂H₄. Furthermore, the real and feasible behaviors of gas separation for Cr-MOF had been verified by dynamic breakthrough experiments. Compared to the iso-structural Fe-MOF, the fabricated Cr-MOF not only improved the chemical stability, but also enhanced the separation efficiency of the C₂ gas molecules. The systematic investigation clearly manifests the important role of chromium ions towards the separation of gas molecules and provides other insights into fabricating MOF-based separation materials.

中文翻译：

通过合成后金属化制备的铬金属-有机骨架提高了C ₂ H ₂ / C ₂ H ₄混合物的分离效率†

铬金属有机骨架（MOF）以其稳定的多孔骨架而闻名，由于合成过程中遇到的困难，因此尚未完全研究。为了研究Cr-MOFs作为分离C ₂客体分子的材料的可能性，构建了一种新型的铁MOF，其可作为通过合成后金属化制备Cr-MOFs的支架。已经系统地研究了两个等结构MOF的相应气体吸附特性，表明了Cr-MOF相对于CO ₂ / C ₂ H ₂和C ₂ H ₂ / C ₂ H ₄的潜在分离能力。。此外，通过动态穿透实验验证了Cr-MOF气体分离的真实可行的行为。与等结构的Fe-MOF相比，制备的Cr-MOF不仅提高了化学稳定性，而且提高了C ₂气体分子的分离效率。系统的研究清楚地表明了铬离子在气体分子分离中的重要作用，并为制造基于MOF的分离材料提供了其他见解。

更新日期：2020-01-08

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