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Microwave‐Assisted Solvothermal Synthesis of Covalent Organic Frameworks (COFs) with Stable Superhydrophobicity for Oil/Water Separation
Author(s) -
Chen Li,
Du Jingcheng,
Zhou Wei,
Shen Huizhen,
Tan Luxi,
Zhou Cailong,
Dong Lichun
Publication year - 2020
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202000872
Subject(s) - materials science , adsorption , solvothermal synthesis , chemical engineering , covalent bond , benzene , oil spill , emulsion , nanotechnology , organic chemistry , chemistry , environmental engineering , environmental science , engineering
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.