Biomimetic Superhydrophobic/Superoleophilic Highly Fluorinated Graphene Oxide and ZIF-8 Composites for Oil-Water Separation

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 nanopa...

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Bibliographic Details
Published in:Angewandte Chemie International Edition Vol. 55; no. 3; pp. 1178 - 1182
Main Authors: Jayaramulu, Kolleboyina, Datta, Kasibhatta Kumara Ramanatha, Rösler, Christoph, Petr, Martin, Otyepka, Michal, Zboril, Radek, Fischer, Roland A.
Format: Journal Article
Language:English
Published: Germany Blackwell Publishing Ltd 18.01.2016
Wiley Subscription Services, Inc
Edition:International ed. in English
Subjects:
Architecture
Biomimetics
Bonding
Contact angle
Crystals
Displays
EGR-1 protein
Fluorides
Fluorination
Graphene
highly fluorinated graphene oxide
Hydrophobic surfaces
Imidazole
Microstructure
Nanocrystals
Nanoparticles
Nucleation
oil-water separation
Oils & fats
Organic solvents
Oxygen
Selectivity
Self-assembly
Separation
Solvents
Sorption
superhydrophobicity
superoleophilicity
zeolite imidazole frameworks
Zeolites
highly fluorinated graphene oxide
zeolite imidazole frameworks
superoleophilicity
superhydrophobicity
oil-water separation
ISSN:1433-7851, 1521-3773
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Summary: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° and low oil contact angle of 0° 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. Pores for effect: The superhydrophobic and simultaneously superoleophilic HFGO@ZIF‐8 composites were utilized for oil–water separation. In this material zeolitic imidazolate (ZIF) nanocrystals serve as pillars between nanosheets of highly fluorinated graphene oxide.
Bibliography:ark:/67375/WNG-W6B5C1PJ-K
ArticleID:ANIE201507692
Alexander von Humboldt foundation
Ministry of Education, Youth and Sports of the Czech Republic - No. LO1305
istex:53604FAF5029F353554EA3359C32C37D5FAA1437
Deutsche Forschungsgemeinschaft - No. EXC 1069
Technology Agency "Competence Centers" - No. TE01020218
These authors contributed equally to this work.
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ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201507692