In situ fabrication of platinum/graphene composite shell on polymer microspheres through reactive self-assembly and in situ reduction

We present a simple method to fabricate a uniform-sized graphene–metal–polymer composite microsphere of core–shell structure. On the surface of amine-functionalized polymer microsphere, graphene oxide (GO) sheets were affixed to give a core–shell structure by self-assembly process followed by the im...

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Bibliographic Details
Published in:Journal of materials science 2013-02, Vol.48 (3), p.1127-1133
Main Authors: Oh, Joon-Suk, Luong, Nguyen Dang, Hwang, Tae-Seon, Hong, Jung-Pyo, Lee, Young Kwan, Nam, Jae-Do
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Composite structures
Core-shell structure
Crystallography and Scattering Methods
Electric properties
Electrical conductivity
Electrical properties
Electrical resistivity
Graphene
Materials Science
Microspheres
Nanoparticles
Organic chemistry
Oxides
Particulate composites
Platinum
Polymer industry
Polymer matrix composites
Polymer Sciences
Polymers
Self assembly
Sheets
Shells
Solid Mechanics
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Summary:We present a simple method to fabricate a uniform-sized graphene–metal–polymer composite microsphere of core–shell structure. On the surface of amine-functionalized polymer microsphere, graphene oxide (GO) sheets were affixed to give a core–shell structure by self-assembly process followed by the immobilization of platinum (Pt) ions to the assembled GO shell. Subsequently, they were chemically reduced in situ converting both GO and Pt ions to reduced GO (RGO) and Pt nanoparticles (NPs), respectively. As a result, a robust RGO-Pt composite shell, composed of RGO sheets and well-distributed Pt NPs, was fabricated on the microsphere surface. Meanwhile, the insulative GO shell was converted to the conductive RGO-Pt shell giving 24.0 S m −1 of electrical conductivity. We demonstrated that the electrical property of the shell was significantly improved by the incorporation of Pt NPs.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-012-6848-6