High stability of few layer graphene nanoplatelets in various solvents

X Xu, Jian Zhou, Gilles Lubineau

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Dispersion of few-layer graphene nanoplatelets (GNPs) in liquid media is a crucial step for various applications. Here, we highlight a simple, nondestructive method for preparing stable aqueous colloidal solutions with GNP powder quickly dispersed in 5 wt.% sodium–hypochlorite- (NaClO) and sodium-bromide- (NaBr) salted solvent by bath sonication. This method makes it possible to easily prepare a highly concentrated colloidal solution (1 mgcenterdotml−1) of GNPs that can easily be re-dispersed in water (treated GNPs). The aqueous suspension we prepared remained stable for longer than a few weeks. We made similar tests with various solvents and dispersibility appeared to decrease with decreasing polarity. High-concentration suspensions using our facile dispersion method could be of particular interest to the large community using graphene for a diversity of applications.
Original languageEnglish (US)
Pages (from-to)012015
JournalIOP Conference Series: Materials Science and Engineering
Volume191
Issue number1
DOIs
StatePublished - Apr 25 2017

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