Solid solution strategy for bimetallic metal-polyphenolic networks deriving electromagnetic wave absorbers with regulated heterointerfaces

The bimetallic solid solution-guided MoS 2 /carbon hybrids derived from FeCu-MPN exhibit tailored and excellent electromagnetic wave absorption performance mainly attributed to the enhanced synergistic effect. • 1. The bimetallic MoS 2 solid solution-carbon hybrids with designed heterointerfaces are successfully fabricated. • 2. XRD Rietveld refinement is used to investigate the heterointerface structures complementally. • 3. The EAB of 6.48 GHz with RL min of -46.85 dB can be obtained. • 4. The excellent performances are contributed to synergistic effect of various enhanced multiple loss mechanisms. Construction heterointerface of multicomponent hybrid materials is significant and effective to modulate their electromagnetic wave (EMW) absorption performances. Herein, MoS 2 solid solution-carbon hybrids derived from FeCu metal-polyphenolic networks (MPNs) are constructed to investigate the effect of interface manipulation on electromagnetic response. MPNs deposition through bimetal ions exchange dominates the phase contents and interfaces of MoS 2 -based composite by tailoring Fe/Cu ratio. The effects of bimetallic ions exchange on micro-nano structures and morphologies, the relationship between heterointerfaces and absorption performances of these hybrids are investigated systematically. The Cu (Cu 2+ and Cu) and Fe (Fe 3+ and Fe 2+ ) can intercalate in interlayers of MoS 2 nanosheets and substitute the Mo vacancy, generating abundant point-face typed heterointerfaces. And the introduction of carbon can also form face-face typed heterointerfaces. Profiting from the heterointerfaces constructed by MoS 2 solid solution and carbon, bimetallic MoS 2 solid solution-carbon hybrids (BMSCHs) possess outstanding EMW absorption performances with ultrawide bandwidth. The optimized minimum reflection loss of samples can reach -46.85 dB and the effective absorption bandwidth covers 6.48 GHz at 2.7 mm. Thus, this work can provide significant guidance for the structural design of high-performance EMW absorber based solid solution strategy.