▎ 摘　　要

Three different graphene foam (GF) were prepared by reducing graphene oxide (GO) with ethylene glycol (EG), sodium hypophosphite and l-ascorbic acid (L-AA) by simple hydrothermal method. It is found that different reductants have a great impact on the micro morphology and the final microwave absorption (MA) performance of GF. Among them, GF with EG as reducing agent has the best MA efficiency. When the filling amount is only 2 wt% and the matching thickness is 3.38 mm, the minimum reflection loss (RLmin) reaches-55.89 dB. And the effective absorption bandwidth (EAB) could reach 6.88 GHz.