Issue 10, 2011
From the journal:

Journal of Materials Chemistry

High concentration few-layer graphene sheets obtained by liquid phase exfoliation of graphite in ionic liquid†

Daniele Nuvoli,a   Luca Valentini,b   Valeria Alzari,a   Sergio Scognamillo,a   Silvia Bittolo Bon,b   Massimo Piccinini,c   Javier Illescasd  and  Alberto Mariani*a  

* Corresponding authors

a Dipartimento di Chimica, Università di Sassari, and local INSTM Unit, Via Vienna 2, Sassari, Italy
E-mail: mariani@uniss.it
Fax: +39 079 212069
Tel: +39 079 229556

b Dipartimento di Ingegneria Civile ed Ambientale, Università di Perugia and local INSTM Unit, Strada di Pentima 4, Terni, Italy
E-mail: mic@unipg.it
Fax: +39 0744 492950
Tel: +39 0744 492924

c Porto Conte Ricerche S.r.l., SP 55 km 8.400 Loc. Tramariglio, Alghero (SS), Italy
E-mail: piccinini@portocontericerche.it

d Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, México D.F.
E-mail: javier.illescas@iim.unam.mx

Abstract

In the present work, the use of a commercial ionic liquid as a convenient solvent medium for graphite exfoliation in mild and easy conditions without any chemical modification is presented. To confirm the presence of few layer graphene, its dispersion, which exhibits Tyndall effect, was characterized by Raman and UV spectroscopies, and atomic force and field emission electron microscopies. It is noteworthy that, by gravimetric analysis, a graphene concentration as high as 5.33 mg ml−1 was determined, which is the highest value reported so far in any solvent.

Graphical abstract: High concentration few-layer graphene sheets obtained by liquid phase exfoliation of graphite in ionic liquid

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Article information

DOI
https://doi.org/10.1039/C0JM02461A
Article type
Paper
Submitted
29 Jul 2010
Accepted
25 Nov 2010
First published
20 Dec 2010

J. Mater. Chem., 2011,21, 3428-3431

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High concentration few-layer graphene sheets obtained by liquid phase exfoliation of graphite in ionic liquid

D. Nuvoli, L. Valentini, V. Alzari, S. Scognamillo, S. B. Bon, M. Piccinini, J. Illescas and A. Mariani, J. Mater. Chem., 2011, 21, 3428 DOI: 10.1039/C0JM02461A

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