Journal
CHEMICAL ENGINEERING JOURNAL
Volume 448, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.137687
Keywords
Post-synthetic modification; Covalent organic frameworks; Hydrophobicity; Oil; water separation; CH4; C-2 H-2 separation; Enamides
Categories
Funding
- National Natural Science Foundation of China [NSFC 22171224, 21971204]
- Innovation Capability Support Program of Shanxi Province [2020TD-022]
- Fund of Education Department of Shaanxi Provincial Government [21JP121]
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A facile strategy was reported to transform COFs into porous aromatic frameworks, resulting in materials with excellent oil adsorption and separation performance, as well as selective C2H2 adsorption.
Porous hydrophobic materials are very attractive for practical use. Reported herein is a facile strategy that transforms imine-linked covalent organic frameworks (COFs) into porous quinoline-linked aromatic frameworks by an aza-Diels-Alder reaction of COF-LZU1 and enamides for the first time. The chemically modified superhydrophobic COF-Q-CF3 not only retained crystallinity and porosity, but also displayed dramatically enhanced oil adsorption as well as water-in-oil emulsion separation performance with excellent separation efficiency. Additionally, it also exhibited selective C2H2 adsorption at 273 K and 1 bar. This protocol constitutes a step for expanding the scope of COF applications in oil spill remediation and separation.
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