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Issue 37, 2018
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Kinetics of the defunctionalization of oxidized few-layer graphene nanoflakes

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Abstract

Thermal defunctionalization of oxidized jellyfish-like few-layer graphene nanoflakes was studied under non-isothermal conditions by simultaneous thermal analysis. Activation energies for thermal decomposition of different oxygen functional groups were calculated by the Kissinger method and compared with those for oxidized carbon nanotubes. Oxygen content in graphene nanoflakes was found to significantly affect the decomposition activation energies of carboxylic and keto/hydroxy acids because of their acceptor properties and strong distortion of the graphene layers at the edges of the nanoflakes. The structure of the carbon material and the oxygen chemical state significantly influence the decomposition kinetics of thermally stable oxygen-containing groups. The activation energy for thermal decomposition of phenol groups (110–150 kJ mol−1) is close to that for graphene oxide reduction.

Graphical abstract: Kinetics of the defunctionalization of oxidized few-layer graphene nanoflakes

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Publication details

The article was received on 13 Aug 2018, accepted on 30 Aug 2018 and first published on 30 Aug 2018


Article type: Paper
DOI: 10.1039/C8CP05149F
Citation: Phys. Chem. Chem. Phys., 2018,20, 24117-24122

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    Kinetics of the defunctionalization of oxidized few-layer graphene nanoflakes

    S. A. Chernyak, A. S. Ivanov, A. M. Podgornova, E. A. Arkhipova, S. Yu. Kupreenko, A. V. Shumyantsev, N. E. Strokova, K. I. Maslakov, S. V. Savilov and V. V. Lunin, Phys. Chem. Chem. Phys., 2018, 20, 24117
    DOI: 10.1039/C8CP05149F

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