▎ 摘　　要

Nitrogen and sulfur co-doped graphene oxide (NS-GO) is obtained using a simple hydrothermal method using thiourea as nitrogen source and sulfur source, and then nitrogen and sulfur co-doped graphene/Fe3O4 (NS-rGO/Fe3O4) composite is synthesized by a solvent method. On this basis, nitrogen and sulfur co-doped graphene/Fe3O4/C nanocomposite (NS-rGO/Fe3O4/C) is obtained using a solvent method combined with a high temperature calcination process using pitch as carbon source. When the matching thickness is 2.7 mm, the NS-rGO/Fe3O4/C has a reflection loss peak at 10.56 GHz, the value of which is - 46.33 dB, and the effective absorption (RL