Multidimensional construction of 1T-MoS₂@graphene nanosheets nanocomposites for enhanced electromagnetic wave absorption

The preparation of electromagnetic (EM) wave absorption materials provided with the characteristics of thin matching thickness, broad bandwidth, and mighty absorption intensity is an efficient solution to current EM pollution. Herein, Graphene nanosheets (GN) were firstly fabricated via a facile high-energy ball milling method, subsequently high-purity 1T-MoS₂ petals were uniformly anchored on the surface of GN to prepare 1T-MoS₂@GN nanocomposites. Plentiful multiple reflection and scattering of EM waves in a distinctive multidimensional structure formed by GN and 1T-MoS₂, copious polarization loss consisting of interfacial polarization loss and dipolar polarization loss severally derived from multitudinous heterointerfaces and profuse electric dipoles in 1T-MoS₂@GN, and mighty conduction loss originated from plentiful induced current in 1T-MoS₂@GN generated via the migration of massive electrons, all of which endowed 1T-MoS₂@GN nanocomposites with exceptional EM wave absorption performances. The minimum reflection loss (RL_min) of 1T-MoS₂@GN reached –50.14 dB at a thickness of only 2.10 mm, and the effective absorption bandwidth (EAB) was up to 6.72 GHz at an ultra-thin matching thickness of 1.84 mm. Moreover, the radar scattering cross section (RCS) reduction value of 36.18 dB m² at 0° could be achieved as well, which ulteriorly validated the tremendous potential of 1T-MoS₂@GN nanocomposites in practical applications.