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

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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.
Funding Information
  • National Natural Science Foundation of China (52072029, 51991340, 51991342, 51722203, 516720)
  • National Key Research and Development Program of China (2018YFA0703500, 2016YFA0202701)
  • Overseas Expertise Introduction Project for Discipline Innovation (B14003)
  • Fundamental Research Funds for the Central Universities (FRF-TP-18-001C1)