High pressure H2, CH4 and CO2 uptake characteristics of graphene-like sheets derived from camphor assisted exfoliation of graphite oxide

A. Ramesh, M. Jeyavelan and M.S.L. Hudson
Central University of Tamil Nadu,
India

Keywords: graphene-like sheet, micropore analyses, BET surface area, isotherm

Summary:

Materials for gas separation and storage are becoming increasingly important for several industrial and commercial applications. We report the synthesis of graphene-like sheets through a simple and cost effective technique by camphor assisted thermal exfoliation of graphite oxide (GO). We have systematically investigated the pore structure and BET surface area of graphene-like sheets using low pressure Ar and N2 isotherm at 87 K and 77 K, respectively. BET surface area shows that these sheets have an effective surface area of ~ 300 m2/g. However, higher concentration of camphor during synthesis of graphene-like sheets lowers its BET surface area and gas storage capacity, due to the formation of carbon soot. High pressure H2, CH4 and CO2 isotherm at 20 °C up to 50 atm reveals that the uptake capacity depends on the isotherm pressure. We will discuss and describe some of the preliminary results on micropore analysis and high pressure gas (H2, CH4 @ CO2) adsorption isotherms of graphene-like sheets derived from camphor assisted thermal exfoliation of graphite oxide.