CO2 Capture by Amino-functionalized Graphene Oxide

Abstract

Human activity is increasing CO₂ atmospheric concentration contributing to global warming. In this situation CO₂ reversible capture and storage, what it is known as carbon capture and conversion (CCC), can be part of the solution. In this context, searching for a suitable material for this application is necessary. The present study was carried out to investigate the CO₂ adsorption of amino-functionalized graphene oxide on its surface. Amino-functionalized graphene oxide samples were prepared by different methods with two kind of molecules: 3-aminopropyltrimethoxysilane (APTMS) and polyethylenimine (PEI). A characterization study of the prepared samples was done with thermal analysis, thermogravimetry (TG) and differential scanning calorimetry (DSC), and X-ray photoelectron spectroscopy (XPS). To evaluate the CO₂ adsorption of the samples CO₂ adsorption isotherms were done. These isotherms correspond with a type I and shows an improvement in CO₂ chemisorption regarding graphene oxide.