High stability of few layer graphene nanoplatelets in various solvents
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AbstractDispersion 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.
CitationXu X, Zhou J, lubineau G (2017) High stability of few layer graphene nanoplatelets in various solvents. IOP Conference Series: Materials Science and Engineering 191: 012015. Available: http://dx.doi.org/10.1088/1757-899x/191/1/012015.
SponsorsThis research was supported by King Abdullah University of Science and Technology.
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