Effect of Functional Groups on Low-Concentration Carbon Dioxide Capture in UiO-66-Type Metal-Organic Frameworks

Zihao Liang; Yangyang Ou; El-Sayed M El-Sayed; Kongzhao Su; Wenjing Wang; Daqiang Yuan

doi:10.1021/acs.inorgchem.3c00821

Effect of Functional Groups on Low-Concentration Carbon Dioxide Capture in UiO-66-Type Metal-Organic Frameworks

Inorg Chem. 2023 May 29;62(21):8309-8314. doi: 10.1021/acs.inorgchem.3c00821. Epub 2023 May 15.

Authors

Zihao Liang^{1

2}, Yangyang Ou^{1

2}, El-Sayed M El-Sayed³, Kongzhao Su^{2

4}, Wenjing Wang^{2

4}, Daqiang Yuan^{2

4}

Affiliations

¹ College of Chemistry, Fuzhou University, Fuzhou 350116, China.
² State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.
³ Chemical Refining Laboratory, Refining Department, Egyptian Petroleum Research Institute, Nasr City 11727, Egypt.
⁴ University of the Chinese Academy of Sciences, Beijing 100049, China.

PMID: 37187458
DOI: 10.1021/acs.inorgchem.3c00821

Abstract

The selective capture of low-concentration CO₂ from air or confined spaces remains a great challenge. In this study, various functional groups were introduced into UiO-66 to generate functionalized derivatives (UiO-66-R, R = NO₂, NH₂, OH, and CH₃), aiming at significantly enhancing CO₂ adsorption and separation efficiency. More significantly, UiO-66-NO₂ and UiO-66-NH₂ with high polarity exhibit exceptional CO₂ affinity and optimal separation characteristics in mixed CO₂/O₂/N₂ (1:21:78). In addition, the impressive stability of UiO-66-NO₂ and UiO-66-NH₂ endows them with excellent recycling stability. The effective adsorption and separation performances demonstrated by these two functional materials suggest their potential as promising physical adsorbents for capturing low-concentration CO₂.