Lightweight and High-Performance Microwave Absorber Based on 2D WS₂-RGO Heterostructures.

ABSTRACT: Two-dimensional (2D) nanomaterials are categorized as a new class of microwave absorption (MA) materials owing to their high specific surface area and peculiar electronic properties. In this study, 2D WS₂-reduced graphene oxide (WS₂-rGO) heterostructure nanosheets were synthesized via a facile hydrothermal process; moreover, their dielectric and MA properties were reported for the first time. Remarkably, the maximum reflection loss (RL) of the sample-wax composites containing 40 wt% WS₂-rGO was - 41.5 dB at a thickness of 2.7 mm; furthermore, the bandwidth where RL < - 10 dB can reach up to 13.62 GHz (4.38-18 GHz). Synergistic mechanisms derived from the interfacial dielectric coupling and multiple-interface scattering after hybridization of WS₂ with rGO were discussed to explain the drastically enhanced microwave absorption performance. The results indicate these lightweight WS₂-rGO nanosheets to be potential materials for practical electromagnetic wave-absorbing applications.

SUBMITTER: Zhang D 

PROVIDER: S-EPMC7770953 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature