Cauliflower-like Sb2S3@graphene oxide composite with excellent electromagnetic wave absorption capacity

Abstract

In this paper, a cauliflower-like Sb2S3@graphene oxide (C-Sb2S3@GO) composite was successfully synthesized using hydrothermal and calcination methods. When the calcination temperature was 550 °C, the filling ratio was 30%, the dosage of PVP was 1.6 g, the maximum effective absorption bandwidth (EAB) was 6.24 GHz at a thickness of 1.65 mm, and the minimum reflection loss (RLmin) reached -61.01 dB (2.15 mm). The experimental results exhibit excellent electromagnetic wave (EMW) properties. The cauliflower-like structure has more microscopic and nanolevel features, which are conducive to multiple reflections and scattering of EMWs. In addition, the combination of C-Sb2S3 with GO imparts rich dipole polarization and interface polarization. These results indicate that the C-Sb2S3@GO composite can be used as a potential candidate for use in efficient and broadband EMW absorbers.