Direct voltammetry of colloidal graphene oxides

The direct voltammetry of aqueous colloidal graphene oxide (GO) solutions is presented in this fundamental study. Since its inception, the majority of GO electrochemistry has been centred on the use of solid-state modified electrodes whereas the voltammetry of solution-based GO species is not well k...

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Bibliographic Details
Published inElectrochemistry communications Vol. 43; pp. 87 - 90
Main Authors Eng, Alex Yong Sheng, Pumera, Martin
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 01.06.2014
Amsterdam Elsevier
New York, NY
Subjects
Chemistry
Colloidal graphene
Cyclic voltammetry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Graphene oxide
Cyclic voltammetry
Graphene oxide
Colloidal graphene
Scanning electron microscopy
Medium effect
Colloidal state
Morphology
pH
Aqueous solution
Surface structure
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Summary:The direct voltammetry of aqueous colloidal graphene oxide (GO) solutions is presented in this fundamental study. Since its inception, the majority of GO electrochemistry has been centred on the use of solid-state modified electrodes whereas the voltammetry of solution-based GO species is not well known. Overall, pH and GO particle size are found to be important aspects that influence the observed results, and voltammetric profiles of nano-sized GO under acidic condition bear the closest similarities to electrode surface-modified GO. Greater knowledge of colloidal GO electrochemistry potentially allows for its future development in electrochemical sensing applications. •Electrolyte pH and GO particle size significantly influence the voltammetry.•Acidic pH is preferential for observation of characteristic reductions.•Inherent redox electrochemistry is most distinct from GO nanofibres.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2014.03.021