Thermogravimetric Analysis (TGA) (a) and derivative thermogravimetry (DTG) (b) thermograms of graphite, graphene oxide (GO), and reductive graphene oxide (rGO); TGA (c) and DTG (d) curves of GO, IL, GO-IL; TGA (e) and DTG (f) curves of rGO, IL, rGO-IL under N2 atmosphere.