Lightweight excellent microwave absorption properties based on sulfur doped graphene

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. (C) 2019 King Saud University Published by Elsevier B.V.