Covalent Organic Frameworks for the Capture, Fixation or Reduction of CO2
- 1University of Arkansas, United States
Covalent organic frameworks (COFs) are porous crystalline organic polymers which have been the subject of immense research interest in the past ten years. COF materials are designed by the organization of two distinct organic molecules bonded in a repeating fashion to form a porous crystal that has made them ideal of gas adsorption and storage. Chemists have strategically designed COFs for the purpose of heterogeneous catalysis of gaseous reactants. Presented in this critical review are efforts towards developing COFs for the sequestration of CO2 from the atmosphere. Researchers have determined the CO2 adsorption capabilities of several COFs is competitive with the highest surface area materials. Engineering the pore environment of COFs with chemical moieties that interact with CO2 have increased the CO2 adsorption performance. The installation of CO2 binding moieties in the COF has made possible the selective adsorption of CO2 over other gases such as N2. The high degree of control of internal pore composition in COFs is coupled with High CO2 adsorption to develop heterogeneous catalysts for the conversion of CO2 to value added products. Two notable examples of this catalysis are the conversion of fixation of CO2 to epoxides for the synthesis of cyclic carbonates and the reduction of CO2 to CO for combustion. Recent examples of COFs for the capture of CO2 will be discussed followed by COF catalysts which use CO2 as a feedstock for the production of value-added products.
Keywords: Covalent organic frameworks (COFs), Carbondioxide (CO2), Catalysis / Kinetics / Carbon dioxide / Oxiranes / Carbonates, Carbon monoxid, Porous materials, cyclic carbonates, Carbon Monoxide, CO2 storage, CO2 adsorbtion
Received: 16 Mar 2019;
Accepted: 24 Jul 2019.
Copyright: © 2019 Ozdemir, Mosleh, Abolhassani, Greenlee, Beitle Jr. and Beyzavi. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Prof. M. Hassan Beyzavi, University of Arkansas, Fayetteville, 72701, North Carolina, United States, email@example.com