Liu Y.Lyu Q.Wang Z.Sun Y.Li C.Sun S.Lin L.-C.Hu S.LI-CHIANG LIN2022-05-242022-05-242021https://www.scopus.com/inward/record.uri?eid=2-s2.0-85106053353&doi=10.1007%2fs10853-021-06006-w&partnerID=40&md5=c2df8dea1fb07ee4fdb7945b450adab8https://scholars.lib.ntu.edu.tw/handle/123456789/611453Frequent oil spills pose severe damages to the marine ecosystems and result in hazardous fires when the spilled oil is ignited. Developing high-performance, flame-retardant absorbent materials for large-scale water treatment is therefore urgently needed. Herein, we report an efficient post-synthetic silylation process to achieve a porous covalent-organic framework (COF), denoted as [CF3] ? COF. The absorption capacity of oils and organic solvents in [CF3] ? COF was explored by experimental measurements with the absorption mechanism illuminated by molecular simulations. The prepared [CF3] ? COF powders were further loaded into melamine sponge to yield a highly hydrophobic absorbent denoted as [CF3] ? COF@sponge, which was demonstrated to effectively remove oils/organic solvents with outstanding stability and excellent flame retardancy. Moreover, an oil-collecting apparatus was designed to continuously separate oils/organic solvents from water. The rapid recovery of oils/organic solvents from water using this device proves the great promise of [CF3] ? COF@sponge in water treatment. ? 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.AbsorptionAdsorbentsEcosystemsMarine pollutionOil spillsSolventsWater treatmentAbsorbent materialsAbsorption capacityAbsorption mechanismsCovalent organic frameworksFlame retardancyFunctionalizedMolecular simulationsRapid recoveryDriers (materials)[SDGs]SDG11[SDGs]SDG14journal article10.1007/s10853-021-06006-w2-s2.0-85106053353