Dielectric Properties of Graphene Oxide Synthesized by Modified Hummers’ Method from Graphite Powder

Abstract

Graphene oxide (GO) has been synthesized by modified Hummers’ method and characterized by Fourier transform infrared spectroscopy, ultraviolet visible spectroscopy, scanning electron microscopy, high resolution transmission electron microscopy, X-ray diffraction technique and Raman spectroscopy. GO characterized using Fourier transform infrared spectra shows that the graphite powder is strongly oxidized by resilient oxidants and the oxygen atoms are present in form of functional groups such as COOH, O–H, C–O–C, and C = O, bonds. GO pellets were prepared to study its dielectric properties as a function of frequency. Dielectric permittivity and electrical conductivity of GO strongly depends upon the extent of temperature.

Keywords:

• Graphene oxide
• spectroscopy
• dielectric
• permittivity
• conductivity

Acknowledgements

Authors are thankful to the Director, National Institute of Technology Raipur, India. Research Scholar Pushpendra Kumar is also thankful to CSIR for award of joint CSIR-UGC JRF & NET and providing financial support from CSIR Scholarship.