Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 15, Issue 21, Pages 3421-3427Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.202000872
Keywords
Covalent organic framework; Microwave chemistry; Superhydrophobicity; Stability; Oil; water separation
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Funding
- National Natural Science Foundation of China [21776025]
- Natural Science Foundation Project of Chongqing [cstc2019jcyj-msxmX0309]
- Fundamental Research Funds for the Central Universities [2020CDJQY-A033, 2019CDQYHG023]
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COFs were synthesized by a microwave-assisted solvothermal route, with the building blocks containing 1,3,5-tris(4-aminophenyl) benzene and 2,3,5,6-tetra-fluoroterephthalaldehyde (or 1,4-phthalaldehyde). The -F groups introduced into the benzene ring promoted hydrophobicity and stability of the COFs. The universality and long effectiveness of oil adsorption can be realized when applying COFs as adsorbent. The powder also exhibited excellent water-in-oil emulsions separation performance, with the separation efficiency no lower than 99.5%. In this work, the use of microwave solvothermal synthesis of superhydrophobic COFs is potential to replace the conventional synthesis process and more suitable for industrial scale-up production. Furthermore, the findings provide a new strategy for solving the problem of oil spill treatment and industrial water-in-oil emulsions separation by using the emerging 2D COFs.
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