Graphene/Polyaniline nanocomposite as electrode material for membrane capacitive deionization

Capacitive deionization (CDI) is a novel ion removal technology that uses static electrical force to drive ions to the charged electrode and stores the ions into porous structure of the electrode. Graphene and graphene nanocomposites are considered promising materials for electrodes because of its g...

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Bibliographic Details
Published in:Desalination 2014-07, Vol.344, p.274-279
Main Authors: Yan, Caijuan, Kanaththage, Yasodinee Wimalasiri, Short, Rob, Gibson, Christopher T., Zou, Linda
Format: Article
Language:English
Subjects:
Applied sciences
Deionization
Electrodes
Electrosorption
Exact sciences and technology
Graphene
Membrane CDI
Membranes
Nanocomposite
Nanostructure
Pollution
Polyaniline
Polyanilines
Polymerization
Specific surface
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Summary:Capacitive deionization (CDI) is a novel ion removal technology that uses static electrical force to drive ions to the charged electrode and stores the ions into porous structure of the electrode. Graphene and graphene nanocomposites are considered promising materials for electrodes because of its good conductivity and extraordinarily high specific surface area. Graphene/Polyaniline nanocomposite was chosen that aims to increase the ion-electrosorption capacitance of graphene. In this work, graphene nanosheets were obtained by reducing oxidized graphite flasks. Graphene/Polyaniline (G/PANI) nanocomposites were synthesized by chemical polymerization of aniline in the presence of dispersed graphene sheets. The morphology and electrochemical property of the composite were characterized. The ion removal performance of the composite was determined by using a membrane capacitive deionization (CDI) bench-scale system. •Graphene/Polyaniline nanocomposites were synthesized by chemical polymerization.•Capacitance of the nanocomposite was higher than that of graphene only.•Faster and more thorough regenerations of G/PANI electrodes were achieved in CDI.•This is due to the synergistic interfacial interactions at a layered structure.
ISSN:0011-9164
1873-4464
DOI:10.1016/j.desal.2014.03.041