摘要
The thermodynamic state and kinetic process of low-temperature deoxygenation reaction of graphene oxide(GO) have been investigated for better understanding on the reduction mechanism by using Differential Scanning Calorimetry(DSC), Thermogravimetry-Mass Spectrometry(TG-MS), and X-ray Photoelectron Spectroscopy(XPS). It is found that the thermal reduction reaction of GO is exothermic with degassing of CO_2, CO and H_2O. Graphene is thermodynamically more stable than GO. The deoxygenation reaction of GO is kinetically controlled and the activation energy for GO is calculated to be 167 k J/mol(1.73 e V/atom).
The thermodynamic state and kinetic process of low-temperature deoxygenation reaction of graphene oxide (GO) have been investigated for better understanding on the reduction mechanism by using Differential Scanning Calorimetry (DSC), Thermogravimetry-Mass Spectrometry (TG-MS), and X-ray Photoelectron Spectroscopy (XPS). It is found that the thermal reduction reaction of GO is exothermic with degassing of CO2, CO and H2O. Graphene is thermodynamically more stable than GO. The deoxygenation reaction of GO is kinetically controlled and the activation energy for GO is calculated to be 167 kJ/mol (1.73 eV/atom).
基金
supported by the National Basic Research Program of China(Grant Nos.2011CB707601and 2009CB623702)
the National Natural Science Foundation of China(Grant Nos.51071044
60976003and 61006011)
China Postdoctoral Science Foundation Funded Pro ject(Grant No.20100481085)
Jiangsu Planned Pro jects for Postdoctoral Research Funds(Grant No.1001014B)
Open Research Fund of State Key Laboratory of Bioelectronics
