title: Biomimetic Superhydrophobic/Superoleophilic Highly Fluorinated Graphene Oxide and ZIF-8 Composites for Oil-Water Separation.
abstract: 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.
authors.affiliation: Inorganic Chemistry II-Organometallics and Materials Chemistry, Ruhr University Bochum, 44870, Bochum, Germany.
authors.forename: Kolleboyina
authors.initials: K
authors.lastname: Jayaramulu
authors.affiliation: Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University, Šlechtitelů 27, 78371, Olomouc, Czech Republic.
authors.forename: Kasibhatta Kumara Ramanatha
authors.initials: KK
authors.lastname: Datta
authors.affiliation: Inorganic Chemistry II-Organometallics and Materials Chemistry, Ruhr University Bochum, 44870, Bochum, Germany.
authors.forename: Christoph
authors.initials: C
authors.lastname: Rösler
authors.affiliation: Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University, Šlechtitelů 27, 78371, Olomouc, Czech Republic.
authors.forename: Martin
authors.initials: M
authors.lastname: Petr
authors.affiliation: Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University, Šlechtitelů 27, 78371, Olomouc, Czech Republic.
authors.forename: Michal
authors.initials: M
authors.lastname: Otyepka
authors.affiliation: Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University, Šlechtitelů 27, 78371, Olomouc, Czech Republic. radek.zboril@upol.cz.
authors.forename: Radek
authors.initials: R
authors.lastname: Zboril
authors.affiliation: Inorganic Chemistry II-Organometallics and Materials Chemistry, Ruhr University Bochum, 44870, Bochum, Germany. roland.fischer@rub.de.
authors.forename: Roland A
authors.initials: RA
authors.lastname: Fischer
keywords: highly fluorinated graphene oxide; oil-water separation; superhydrophobicity; superoleophilicity; zeolite imidazole frameworks