Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 3, Pages 1178-1182Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201507692
Keywords
highly fluorinated graphene oxide; oil-water separation; superhydrophobicity; superoleophilicity; zeolite imidazole frameworks
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Funding
- Cluster of Excellence RESOLV - Deutsche Forschungsgemeinschaft [EXC 1069]
- Palacky University
- Ministry of Education, Youth and Sports of the Czech Republic [LO1305]
- Technology Agency Competence Centers [TE01020218]
- Palacky University [IGA_PrF_2015_017]
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Superhydrophobic/superoleophilic composites HFGO@ZIF-8 have been prepared from highly fluorinated graphene oxide (HFGO) and the nanocrystalline zeolite imidazole framework ZIF-8. The structure-directing and coordination-modulating properties of HFGO allow for the selective nucleation of ZIF-8 nanoparticles at the graphene surface oxygen functionalities. This results in localized nucleation and size-controlled ZIF-8 nanocrystals intercalated in between HFGO layers. The composite microstructure features fluoride groups bonded at the graphene. Self-assembly of a unique micro-mesoporous architecture is achieved, where the micropores originate from ZIF-8 nanocrystals, while the functionalized mesopores arise from randomly organized HFGO layers separated by ZIF-8 nanopillars. The hybrid material displays an exceptional high water contact angle of 162 degrees and low oil contact angle of 0 degrees and thus reveals very high sorption selectivity, fast kinetics, and good absorbencies for nonpolar/polar organic solvents and oils from water. Accordingly, Sponge@HFGO@ZIF-8 composites are successfully utilized for oil-water separation.
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