Anchoring 1T-MoS₂ petals on N-doped reduced graphene oxide for exceptional electromagnetic wave absorption

Abstract

The effective construction of electromagnetic (EM) wave absorption materials with thin matching thickness, broad bandwidth, and remarkable absorption is a great solution to EM pollution, which is a hot topic in current environmental governance. In this study, N-doped reduced graphene oxide (N-rGO) was first prepared using a facile hydrothermal method. Then, high-purity 1T-MoS₂ petals were homogeneously anchored to the wrinkled surface of N-rGO to fabricate 1T-MoS₂@N-rGO nanocomposites. The numerous electric di-poles and profuse heterointerfaces in 1T-MoS₂@N-rGO would induced the multiple reflection and scattering of EM waves in a distinctive multidimensional structure formed by two-dimensional N-rGO and 1T-MoS₂ microspheres with plentiful thin nanosheets, remarkable conduction loss derived from the migration of massive electrons in a well-constructed conductive network formed by 1T-MoS₂@N-rGO, and abundant polarization loss (including dipolar polarization loss and interfacial polarization loss). All of these gave the 1T-MoS₂@N-rGO nanocomposites superior EM wave absorption performances. The effective absorption bandwidth of 1T-MoS₂@N-rGO reached 6.48 GHz with a relatively thin matching thickness of 1.84 mm, and a minimum reflection loss of −52.24 dB was achieved at 3.84 mm. Additionally, the radar scattering cross-section reduction value of 1T-MoS₂@N-rGO was up to 35.42 dB·m² at 0°, which further verified the huge potential of our fabricated 1T-MoS₂@N-rGO nanocomposites in practical applications.

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