Kinetics of the defunctionalization of oxidized few-layer graphene nanoflakes

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...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Physical chemistry chemical physics : PCCP 2018, Vol.2 (37), p.24117-24122
Hauptverfasser: Chernyak, Sergei A, Ivanov, Anton S, Podgornova, Angelina M, Arkhipova, Ekaterina A, Kupreenko, Stepan Yu, Shumyantsev, Alexei V, Strokova, Natalia E, Maslakov, Konstantin I, Savilov, Serguei V, Lunin, Valery V
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung: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. Thermal defunctionalization of oxidized jellyfish-like few-layer graphene nanoflakes was studied.
ISSN:1463-9076
1463-9084
DOI:10.1039/c8cp05149f