CO2 capture by amino-functionalized graphene oxide

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.