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Capillary zone electrophoresis of graphene oxide and chemically converted graphene


Muller, MB and Quirino, JP and Nesterenko, PN and Haddad, PR and Gambhir, S and Li, D and Wallace, GG, Capillary zone electrophoresis of graphene oxide and chemically converted graphene, Journal of Chromatography A, 1217, (48) pp. 7593-7597. ISSN 0021-9673 (2010) [Refereed Article]

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DOI: doi:10.1016/j.chroma.2010.09.069


The preparation of processable graphene oxide colloids called chemically converted graphene (CCG) involves the following steps: oxidation of graphite to form graphite oxide; exfoliation of graphite oxide to form graphene oxide (GO); and reduction of GO to form CCG. In this work, the exfoliation and reduction steps were monitored by capillary zone electrophoresis (CZE). CZE was performed in fused silica capillaries with UV absorbance at 230 nm (GO) and 270 nm (CCG) using 250 ėM tetrapropylammonium hydroxide (pH 10.4). The results indicate that almost complete exfoliation of graphite oxide (0.05 wt%) and higher recovery of CCG were obtained by sonication at 50% power for more than 15 h. CZE is considered a valuable tool for the fractionation and analysis of GO nanoparticles and, hence, for the control of different steps in preparation of CCG.

Item Details

Item Type:Refereed Article
Keywords:capillary zone electrophoresis, graphene nanosheets, fractionation, aggregation, atomic force microscopy, sonication
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Separation science
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Quirino, JP (Associate Professor Lito Quirino)
UTAS Author:Nesterenko, PN (Professor Pavel Nesterenko)
UTAS Author:Haddad, PR (Professor Paul Haddad)
ID Code:65398
Year Published:2010
Web of Science® Times Cited:44
Deposited By:Austn Centre for Research in Separation Science
Deposited On:2010-11-10
Last Modified:2015-01-20
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