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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dc.contributor.authorGodoy A.P.
dc.contributor.authorEcorchard P.
dc.contributor.authorBenes H.
dc.contributor.authorTolasz J.
dc.contributor.authorSmrzova D.
dc.contributor.authorSeixas L.
dc.contributor.authorPedrotti J.J.
dc.contributor.authorde Souza E.A.T.
dc.contributor.authorEl Seoud O.A.
dc.contributor.authorDonato R.K.
dc.date.accessioned2024-03-12T23:52:39Z
dc.date.available2024-03-12T23:52:39Z
dc.date.issued2019
dc.description.abstract© 2019 Elsevier B.V.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.
dc.description.firstpage279
dc.description.lastpage288
dc.description.volume55
dc.identifier.doi10.1016/j.ultsonch.2019.01.016
dc.identifier.issn1873-2828
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/35240
dc.relation.ispartofUltrasonics Sonochemistry
dc.rightsAcesso Aberto
dc.subject.otherlanguageBiphasic liquid system
dc.subject.otherlanguageCavitation-based emulsification
dc.subject.otherlanguageGraphene
dc.subject.otherlanguageIonic liquids
dc.subject.otherlanguageLiquid phase exfoliation
dc.titleUltrasound exfoliation of graphite in biphasic liquid systems containing ionic liquids: A study on the conditions for obtaining large few-layers graphene
dc.typeArtigo
local.scopus.citations19
local.scopus.eid2-s2.0-85060749366
local.scopus.subjectBiphasic liquid systems
local.scopus.subjectFew layers graphene
local.scopus.subjectGraphene sheets
local.scopus.subjectGraphite exfoliation
local.scopus.subjectLiquid Phase
local.scopus.subjectOperational parameters
local.scopus.subjectRe-aggregation
local.scopus.subjectUltrasound power
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85060749366&origin=inward
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