Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 16, Pages 5297-5301Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201814487
Keywords
graphene-based microspheres; metal-organic frameworks; oil-water separation; superhydrophobicity; superoleophilicity
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Funding
- National Natural Science Foundation of China [51773012]
- Sino-German (CSC-DAAD) Postdoc Scholarship Program [57343410]
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Graphene/MOF-based composite materials in three-dimensional (3D) architectures are promising for the treatment of oil-containing wastewater by absorption owing to their intrinsic properties of graphene and metal-organic frameworks (MOFs), such as high porosity, ultralow density, and facilely tailored superwettability. In this study, novel wrinkled 3D microspherical MOF@rGO composites with both superhydrophobic and superoleophilic properties were developed by embedding MOF nanoparticles between graphene oxide (GO) nanosheets, followed by high-temperature reduction self-assembly. The microspherical composites feature a unique micro/nano hierarchy consisting of crumpled reduced GO (rGO) nanosheels intercalated with well-dispersed MOF nanoparticles. combined with the superwettability and abundant meso/microporosity, the peculiar architectures of wrinkled ZIF-8@rGO microspheres show very fast absorption rates and high sorption selectivity for organic solvents and oils from water.
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