Volume 19, Issue 39 2302570
Research Article

Boost of Gas Adsorption Kinetics of Covalent Organic Frameworks via Ionic Liquid Solution Process

Jie Fu

Jie Fu

College of Chemistry, Sichuan University, Chengdu, 610064 China

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Jia-Ying Liu

Jia-Ying Liu

College of Chemistry, Sichuan University, Chengdu, 610064 China

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Guo-Hao Zhang

Guo-Hao Zhang

College of Chemistry, Sichuan University, Chengdu, 610064 China

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Qiu-Hong Zhu

Qiu-Hong Zhu

College of Chemistry, Sichuan University, Chengdu, 610064 China

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Shuang-Long Wang

Shuang-Long Wang

College of Chemistry, Sichuan University, Chengdu, 610064 China

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Song Qin

Song Qin

College of Chemistry, Sichuan University, Chengdu, 610064 China

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Ling He

Corresponding Author

Ling He

College of Chemistry, Sichuan University, Chengdu, 610064 China

E-mail: [email protected]; [email protected]

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Guo-Hong Tao

Corresponding Author

Guo-Hong Tao

College of Chemistry, Sichuan University, Chengdu, 610064 China

E-mail: [email protected]; [email protected]

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First published: 25 May 2023
Citations: 8

Abstract

Adsorption, storage, and conversion of gases (e.g., carbon dioxide, hydrogen, and iodine) are the three critical topics in the field of clean energy and environmental mediation. Exploring new methods to prepare high-performance materials to improve gas adsorption is one of the most concerning topics in recent years. In this work, an ionic liquid solution process (ILSP), which can greatly improve the adsorption kinetic performance of covalent organic framework (COF) materials for gaseous iodine, is explored. Anionic COF TpPaSO3H is modified by amino-triazolium cation through the ILSP method, which successfully makes the iodine adsorption kinetic performance (K80% rate) of ionic liquid (IL) modified COF AC4tirmTpPaSO3 quintuple compared with the original COF. A series of experimental characterization and theoretical calculation results show that the improvement of adsorption kinetics is benefited from the increased weak interaction between the COF and iodine, due to the local charge separation of the COF skeleton caused by the substitution of protons by the bulky cations of ILs. This ILSP strategy has competitive help for COF materials in the field of gas adsorption, separation, or conversion, and is expected to expand and improve the application of COF materials in energy and environmental science.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

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