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Ultrasound exfoliation of graphite in biphasic liquid systems containing ionic liquids: A study on the conditions for obtaining large few-layers graphene
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SYSNO ASEP 0501214 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Ultrasound exfoliation of graphite in biphasic liquid systems containing ionic liquids: A study on the conditions for obtaining large few-layers graphene Author(s) Godoy, A. P. (BR)
Ecorchard, Petra (UACH-T) SAI, RID, ORCID
Beneš, Hynek (UMCH-V) RID, ORCID
Tolasz, Jakub (UACH-T) RID, ORCID, SAI
Smržová, Darina (UACH-T) ORCID, SAI, RID
Seixas, L. (BR)
Pedrotti, J. J. (BR)
de Souza, E. A.T. (BR)
El Seoud, O. A. (BR)
Donato, R. K. (BR)Number of authors 10 Source Title Ultrasonics Sonochemistry. - : Elsevier - ISSN 1350-4177
Roč. 55, JUL (2019), s. 279-288Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords Biphasic liquid system ; Cavitation-based emulsification ; Graphene ; Ionic liquids ; Liquid phase exfoliation Subject RIV CA - Inorganic Chemistry OECD category Inorganic and nuclear chemistry Subject RIV - cooperation Institute of Macromolecular Chemistry - Macromolecular Chemistry R&D Projects LM2015073 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA17-08273S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access with time embargo (01.07.2020) Institutional support UACH-T - RVO:61388980 ; UMCH-V - RVO:61389013 UT WOS 000470047800030 EID SCOPUS 85060749366 DOI 10.1016/j.ultsonch.2019.01.016 Annotation Herein we describe a successful protocol for graphite exfoliation using a biphasic liquid system (water/dichloromethane, DCM) containing ionic liquids (ILs, 1,3-dibenzylimidazolium benzoate- and 1-naphthoate). The use of (surface active) IL and sonication led to stable DCM/water (O/W) emulsion, which enhanced graphene formation, suppressed its re-aggregation and decreased shear/cavitation damage. The O/W emulsion stabilization by the ILs was studied by dynamic light scattering (DLS), whereas their interaction with the graphene sheets were described by Density Functional Theory (DFT) calculations. Moreover, a comprehensive investigation on cavitation-based exfoliation in the O/W systems was performed to assess the importance of operational parameters, including, the type of ultrasound processor, ultrasound power and insonation, and the influence of the exfoliation medium. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2020 Electronic address http://hdl.handle.net/11104/0297116
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