Fabrication of three-dimensional graphene foam with high electrical conductivity and large adsorption capability

•Three-dimensional graphene foam was synthesized by plasma-enhanced CVD.•The graphene foam exhibited a high electrical conductivity of 125S/cm.•The graphene foam showed a large surface area of 625.4cm2/g.•The prepared graphene foam/epoxy composites showed a high conductivity.•The derived graphene ox...

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Bibliographic Details
Published in:Applied surface science 2014-08, Vol.311, p.808-815
Main Authors: Chen, Guiqiang, Liu, Yanxia, Liu, Fei, Zhang, Xiao
Format: Article
Language:English
Subjects:
Adsorption
Austenitic stainless steels
Chemical vapor deposition
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Electrical conductivity
Electrical resistivity
Exact sciences and technology
Foams
Graphene
Graphene foam
Nanostructure
Physics
Resistivity
Surface chemistry
Three dimensional
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Summary:•Three-dimensional graphene foam was synthesized by plasma-enhanced CVD.•The graphene foam exhibited a high electrical conductivity of 125S/cm.•The graphene foam showed a large surface area of 625.4cm2/g.•The prepared graphene foam/epoxy composites showed a high conductivity.•The derived graphene oxide foam showed an excellent absorption capability. A three-dimensional (3D), free-standing graphene foam was prepared by plasma-enhanced chemical vapor deposition on nickel-foam. The prepared graphene foam was found to consist of few-layered vertically-aligned graphene sheets with highly graphite structure. Owing to the 3D interconnected porous nanostructures, the graphene foam exhibited a high electrical conductivity of 125S/cm and a large surface area of 625.4cm2/g. For practical application, we prepared the graphene foam/epoxy composites showing a maximum conductivity of 196S/m at 2.5vol.% filler loading, and a rather low percolation threshold of 0.18vol.%. Furthermore, the derived graphene oxide foam exhibited an excellent absorption capability (177.6mg/g for As(V), 399.3mg/g for Pb(II)) and recyclability (above 90% removal efficiency after five cycles) for the removal of heavy metal ions. The present study reveals that the multifunctional graphene foam may broaden the graphene-based materials for the applications in electrically conductive composites and environmental cleanup.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2014.05.171