“…[1][2][3] To prevent and restrain these hazards, the demands for developing electromagnetic wave absorbers with broader absorbing bandwidths and more effective absorption properties is ever urgent which has aroused the intense interest of researchers. 4,5 Graphene, a at monolayer of hexagonally arrayed sp 2bonded carbon atoms tightly packed into a two-dimensional (2D) honeycomb lattice, has attracted tremendous scientic attention due to its promise in the eld of microwave-absorbent materials. 6,7 Furthermore, reduced graphene oxide (RGO) coupled with clustered defects and functional groups has the properties of graphene while being easier to fabricate.…”