Preparation and characterization of aminated graphite oxide for CO2 capture

► Polyamines are covalently attached to the layers of graphite oxide (GO). ► We use aminated graphite oxide as CO2 adsorbent. ► Aminated graphite oxide shows higher adsorption capacity for CO2 than bare GO. ► GO modified by EDA shows better adsorption performance than that modified by DETA or TETA. ► GO with 50 wt% EDA has larger adsorption capacity than that with 10 wt% or 100 wt% EDA.