Broadband electromagnetic wave absorption properties and mechanism of MoS2/rGO nanocomposites

Abstract

Molybdenum disulfide/reduced graphene oxide (MoS₂/rGO) nanocomposites are successfully prepared as enhanced electromagnetic wave absorbers using a facile ultrasonic dispersion method. The electromagnetic parameters of the MoS₂/rGO nanocomposites are modulated to achieve enhanced electromagnetic wave absorption performance. By regulating the filler loadings of MoS₂ and rGO to 10 and 5% respectively, the maximum reflection loss of −26.7 dB and effective absorption bandwidth of 5.05 GHz can be obtained. Furthermore, the electromagnetic wave absorption mechanism of the MoS₂/rGO nanocomposites has been thoroughly studied. The enhanced microwave absorption performance of the MoS₂/rGO nanocomposites is mainly originated from dielectric loss and conductive loss. The interfacial polarization relaxation greatly plays a key role in enhanced electromagnetic wave absorption due to the larger specific surface area and the multiple heterointerfaces. MoS₂/rGO nanocomposites exhibit promising electromagnetic wave absorption performance including thin thickness, lightweight and wide effective absorption bandwidth. Overall, MoS₂/rGO nanocomposites as enhanced absorbers have great potential in electromagnetic wave absorption fields.