A Robust Squarate-Cobalt Metal-Organic Framework for CO2/N2 Separation

Lei Zhang; Ziyu He; Yupeng Liu; Jianjun You; Lang Lin; Jihui Jia; Song Chen; Nengbin Hua; Li-An Ma; Xiaoyun Ye; Yanrong Liu; Cheng-Xia Chen; Qianting Wang

doi:10.1021/acsami.3c06530

A Robust Squarate-Cobalt Metal-Organic Framework for CO₂/N₂ Separation

ACS Appl Mater Interfaces. 2023 Jun 28;15(25):30394-30401. doi: 10.1021/acsami.3c06530. Epub 2023 Jun 16.

Authors

Lei Zhang¹, Ziyu He¹, Yupeng Liu¹, Jianjun You¹, Lang Lin¹, Jihui Jia¹, Song Chen¹, Nengbin Hua¹, Li-An Ma¹, Xiaoyun Ye¹, Yanrong Liu², Cheng-Xia Chen³, Qianting Wang¹

Affiliations

¹ Collaborative Innovation Center for Intelligent and Green Mold and Die of Fujian Province, College of Materials Science and Engineering, Fujian University of Technology, Fuzhou, Fujian 350118, China.
² Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
³ MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.

PMID: 37327481
DOI: 10.1021/acsami.3c06530

Abstract

The separation of CO₂ from the industrial post-combustion flue gas is of great importance to reduce the increasingly serious greenhouse effect, yet highly challenging due to the extremely high stability, low cost, and high separation performance requirements for adsorbents under the practical operating conditions. Herein, we report a robust squarate-cobalt metal-organic framework (MOF), FJUT-3, featuring an ultra-small 1D square channel decorated with -OH groups, for CO₂/N₂ separation. Remarkably, FJUT-3 not only has excellent stability under harsh chemical conditions but also presents low-cost property for scale-up synthesis. Moreover, FJUT-3 shows excellent CO₂ separation performance under various humid and temperature conditions confirmed by the transient breakthrough experiments, thus enabling FJUT-3 with adequate potentials for industrial CO₂ capture and removal. The distinct CO₂ adsorption mechanism is well elucidated by theoretical calculations, in which the hierarchical C···O_CO₂, C-O···C_CO₂, and O-H···O_CO₂ interactions play a vital synergistic role in the selective CO₂ adsorption process.

Keywords: breakthrough; carbon capture; gas separation; metal−organic framework; squarate-cobalt MOF.