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用于CH/CO和CO/CH分离的层状锌基金属有机框架中的溶剂调控

Solvent Regulation in Layered Zn-MOFs for CH/CO and CO/CH Separation.

作者信息

Zhao Xingyao, Chang Xiaotong, Qin Caixian, Wang Xiaokang, Xu Mingming, Fan Weidong, Meng Qingguo, Sun Daofeng

机构信息

School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China.

College of Chemical Engineering and Environmental Chemistry, Weifang University, Weifang 261061, China.

出版信息

Molecules. 2025 Mar 5;30(5):1171. doi: 10.3390/molecules30051171.

DOI:10.3390/molecules30051171
PMID:40076394
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11901866/
Abstract

The development of alternative adsorptive separation technologies is extremely significant for the separation of CH/CO and CO/CH in the chemical industry. Emerging metal-organic frameworks (MOFs) have shown great potential as adsorbents for gas adsorption and separation. Herein, we synthesized two layered Zn-MOFs, UPC-96 and UPC-97, with 1,2,4,5-tetrakis(4-carboxyphenyl)-3,6-dimethylbenzene (TCPB-Me) as a ligand via the solvent regulation of the pH values. UPC-96 with a completely deprotonated ligand was obtained without the addition of acid, exhibiting two different channels with cross-sectional sizes of 11.6 × 7.1 and 8.3 × 5.2 Å. In contrast, the addition of acid led to the partial deprotonation of the ligand and afforded UPC-97 two types of channels with cross-sectional sizes of 11.5 × 5.7 and 7.4 × 3.9 Å. Reversible N adsorption isotherms at 77 K confirmed their permanent porosity, and the differentiated single-component CH, CO, and CH adsorption isotherms indicated their potential in CH/CO and CO/CH separation.

摘要

替代吸附分离技术的发展对于化工行业中CH/CO和CO/CH的分离极为重要。新兴的金属有机框架材料（MOFs）作为气体吸附和分离的吸附剂已展现出巨大潜力。在此，我们通过调节pH值的溶剂法，以1,2,4,5-四（4-羧基苯基）-3,6-二甲基苯（TCPB-Me）为配体合成了两种层状锌基MOF材料，UPC-96和UPC-97。在不添加酸的情况下获得了配体完全去质子化的UPC-96，其具有两种不同的通道，横截面尺寸分别为11.6×7.1 Å和8.3×5.2 Å。相比之下，添加酸导致配体部分去质子化，使UPC-97具有两种类型的通道，横截面尺寸分别为11.5×5.7 Å和7.4×3.9 Å。77 K下的可逆N吸附等温线证实了它们的永久孔隙率，而不同的单组分CH、CO和CH吸附等温线表明它们在CH/CO和CO/CH分离方面具有潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1694/11901866/49669c7d3f03/molecules-30-01171-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1694/11901866/1a868a9e2b04/molecules-30-01171-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1694/11901866/0ac55346f4d3/molecules-30-01171-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1694/11901866/a93f1670f3e5/molecules-30-01171-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1694/11901866/816b6f02d039/molecules-30-01171-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1694/11901866/23ed97bdd830/molecules-30-01171-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1694/11901866/7f0e98b2e49d/molecules-30-01171-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1694/11901866/49669c7d3f03/molecules-30-01171-g012.jpg

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