Facile synthesis of NixCo3-xS4 hollow nanoprism with broader electromagnetic absorption properties: Effect of Ni/Co atomic ratios
A suitable component with a benefited morphology is crucial to ensure the good electromagnetic absorption (EA) ability if used as electromagnetic absorber to deal with the severe electromagnetic interference crisis. In this research, Ni x Co 3-x S 4 hollow nanoprisms with tunable Ni/Co molar ratios have been successfully prepared through a simple liquid reflux and subsequently conducting a sulfidation reaction. The morphologies, crystal phase structures were analyzed by X-ray diffraction (XRD), and transmission electron microscopy (TEM). As revealed by TEM, the Ni x Co 3-x S 4 displayed hollow nanoprism shape with an average length of 1.2 μm, width of 100 nm and edge thickness of 13 nm, respectively. Afterward, the electromagnetic absorption abilities of these Ni x Co 3-x S 4 products at various x values (x = 0.2, 0.5, 0.8) were investigated in terms of the theory of transmission lines. The results demonstrated that the bandwidth ((RL ≤ −10 dB) with a specimen thickness of 2.0 mm could cover 5.6 GHz when x∼0.5, which is much greater than Ni 0.2 Co 2.8 S 4 and Ni 0.8 Co 2.2 S 4 filling layers. The electromagnetic loss mechanism was discussed in depth, which was correlated with molar ratios, and unique hollow nanoprism structure.
危险品化学品经营许可证（带存储）