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Few layer graphenes decorated with silver nanoparticles

Vermisoglou, E, Todorova, N, Pilatos, G, Romanos, G, Likodimos, V, Boukos, N, Lei, C, Markoulidis, F, Lekakou, C and Trapalis, C (2012) Few layer graphenes decorated with silver nanoparticles ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials.

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Graphite oxide (GO) powder was irradiated in a microwave oven and lightweight expanded graphite oxide (EGO) powder with high BET surface area 1316 m2/g was obtained. Activation of EGO was performed by impregnation in KOH solution and high temperature treatment under Ar flow, followed by annealing in vacuum (t-EGO). KOH acted more as a reducing agent diminishing the defects than as a surface modifier for high porosity. EGO and t-EGO were further decorated with Ag nanoparticles (∼40 nm) applying solar light irradiation. Along with Ag deposition the structural defects of the graphene were reduced upon photo-irradiation. It was established that among the bare graphenes the EGO exhibited the highest capacitance. From the Ag-containing composites, the KOH activated EGO acted as a supercapacitor, while the non-activated EGO as a resistant.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Vermisoglou, E
Todorova, N
Pilatos, G
Romanos, G
Likodimos, V
Boukos, N
Lei, C
Trapalis, C
Date : 1 January 2012
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:18
Last Modified : 24 Jan 2020 23:46

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