Lightweight and high-efficiency electromagnetic wave (EMW) absorption sulfur doped graphene (S-GS) was fabricated by reducing and doping graphene oxide (GO) using chemical method. The obtained S-GS exhibits an extremely low reflection loss (RL), wide effective absorption frequency bandwidth at a thin coating thickness (d), light weight and low cost. The minimum RL reaches −52.3 dB at 17.5 GHz with a matching thickness of 1.22 mm. More excitedly, the EM absorption properties could be double-adjusted. By changing the amount of dopant and the thickness of S-GS, The minimum RL touches −52.2 dB at 9.4 GHz and −49.3 dB at 8.5 GHz, respectively, even much lower than most kinds of GS based composites which combined with polymers, magnetic nanoparticles and so on. In a word, S-GS can be promised to be an ideal candidate for constructing novel MW absorber with lightweight, strong absorption characteristics, and thin matching thickness.

通过化学方法对氧化石墨烯（GO）进行还原和掺杂，制备了轻质高效电磁波（EMW）吸收硫掺杂石墨烯（S-GS）。所获得的S-GS表现出极低的反射损耗（RL），在薄的涂层厚度（d）下宽的有效吸收频率带宽，重量轻且成本低。最小RL在17.5 GHz时达到-52.3 dB，匹配厚度为1.22 mm。更令人兴奋的是，可以对电磁吸收性能进行双重调整。通过改变掺杂剂的数量和S-GS的厚度，最小RL分别在9.4 GHz时达到-52.2 dB，在8.5 GHz时达到-49.3 dB，甚至远低于大多数与聚合物，磁性材料结合的GS基复合材料纳米粒子等。一言以蔽之