Graphene exfoliation in ionic liquids: unified methodology
作者： Vitaly V. Chaban , Eudes Eterno Fileti
DOI: 10.1039/C5RA16857K
关键词: Imidazole 、 Materials science 、 Graphite 、 Binding energy 、 Organic chemistry 、 Graphene 、 Solvent 、 Ionic liquid 、 Chemical engineering 、 Exfoliation joint 、 Tetrafluoroborate
摘要: Exfoliation constitutes a promising and straightforward technique to obtain high-quality product (graphene, GRA) from an affordable source (graphite). Success of the exfoliation is blocked by inefficient solvents, which must prevent backward aggregation GRA. The search for solvent with optimal physicochemical properties currently underway. This work applies systematic methodology rate solvents respect their performance in GRA exfoliation. established was applied 1-ethyl-3-methylimidazolium tetrafluoroborate, [EMIM][BF4], ionic liquid (IL). Having derived thermodynamic descriptors during real-time exfoliation, we conclude that [BMIM][BF4] mediocre. Nevertheless, [EMIM][BF4] suitable starting point engineer more advanced solvents. According binding energy decomposition, imidazole ring drives GRA–[EMIM][BF4] interactions, while impact [BF4] significantly smaller. We discuss possible pathways improve ILs
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