Nano-Micro Letters

Thermodynamic and kinetic analysis of low-temperature thermal reduction of graphene oxide

Kuibo Yin1Haitao Li2Yidong Xia2Hengchang Bi1Jun Sun1Zhiguo Liu2Litao Sun1,*

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Nano-Micro Letters, , Volume 3, Issue 1, pp 51-55
Publication Date (Web): May 6, 2011 (Article)




Figure 1 A typical DSC curve of GO with a heating rate of 20C/min (a); ln(Tp**2/V) as a function of 1/Tp (b).

The thermodynamic state and kinetic process of low-temperature deoxygenation reaction of graphene oxide (GO) were investigated for better understanding the reduction mechanism by using Differential Scanning Calorimetry (DSC), Thermogravimetry-Mass Spectrometry (TG-MS), and X-ray Photoelectron Spectroscopy (XPS). It was found that the thermal reduction reaction of GO is exothermic with degassing of CO2, CO and H2O. The graphene is thermodynamically more stable than GO.The deoxygenation reaction of GO is kinetically controlledand the activation energy for GO is calculated as 167 kJ/mol (1.73 eV/atom).



Graphene oxide; Activation energy; Thermal deoxygenation


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