Fig. S11 Hysteresis loops of MGF@Fe3O4 sample measured at 298 K after acid treated for diffirent time. Table S1: EMW absorption performance of materials reported in open literatures Samples in matrices wt Max Thickness Testing Frequency Refs % |RL| frequency [GHz] [mm] range [GHz] [dB] (RL -10 ≤ (RL -10 ≤ dB) dB) 3D graphene 27 -64.4 2.4 1-18 12-18 This foam@Fe3O4 in wax work 25 -51.5 1.8 2-18 12.4-17.5 [1] nanosheet graphene/SiO2 7 -42 2.1 X-band 8.4-12 [2] composites Carbon Hollow 20 -84 3.9 2-18 6.7-10 [3] Microspheres Fe/C 30 -43 3.0 2-18 ----- [4] rGO/a-Fe2O3 8 -33.5 3.0 1-18 10.8-17.2 [5] composite Fe3O4/GCs Composites 30 -32 3.5 2-18 6.9-11.9 [6] Thermally reduced 1 -43.5 3.5 2-18 9.4-16.8 [7] graphene Porous 30 -44.2 3.0 0.5-18 4.1-6.8 [8] graphene 16.0-17.8 RGO–Fe3O4 40 -15.4 2.0 0.5-18 10.4-13.2 [9]
Fig. S11 Hysteresis loops of MGF@Fe3O4 sample measured at 298 K after acid treated for diffirent time. Table S1: EMW absorption performance of materials reported in open literatures Samples in matrices wt % Max |RL| [dB] Thickness [mm] (RL ≤ -10 dB) Testing frequency range [GHz] Frequency [GHz] (RL ≤ -10 dB) Refs 3D graphene foam@Fe3O4 in wax 27 -64.4 2.4 1-18 12-18 This work nanosheet 25 -51.5 1.8 2-18 12.4-17.5 [1] graphene/SiO2 composites 7 -42 2.1 X-band 8.4-12 [2] Carbon Hollow Microspheres 20 -84 3.9 2-18 6.7-10 [3] Fe/C 30 -43 3.0 2-18 ----- [4] rGO/a-Fe2O3 composite 8 -33.5 3.0 1-18 10.8-17.2 [5] Fe3O4/GCs Composites 30 -32 3.5 2-18 6.9-11.9 [6] Thermally reduced graphene 1 -43.5 3.5 2-18 9.4-16.8 [7] Porous graphene 30 -44.2 3.0 0.5-18 4.1-6.8 16.0-17.8 [8] RGO–Fe3O4 40 -15.4 2.0 0.5-18 10.4-13.2 [9]
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