Self-templated growth of heterogeneous hollow Cu2-xS@1T-MoS2 microcubes with superior electromagnetic wave absorption

With the proliferation of the use of wireless communication technologies, lightweight, easily fabricated EMW absorbers are in great demand for commercial and stealth applications. In this paper, well-defined Cu2O microcubes were successfully transformed into Cu9S5@MoS2 hollow microboxes by a facile hydrothermal process through a template-directed in situ vulcanization/complexation synergistic reaction. The MoS2 nanosheets loaded on the microboxes exhibited a high 1T phase ratio. Compared to pure MoS2 nanosheets, Cu9S5@MoS2 is advantageous in building conducting networks and interfacial polarization due to its good structure. The com-posite of Cu9S5@MoS2 with paraffin showed good EMW absorption performance at 40 wt%. By adjusting the MoS2 loading, the attenuation and impedance coefficients can be further optimized, with an optimized RLmin of-52.2 dB at 2.1 mm and an EAB of 4.7 GHz.

Automated summary

In this paper, Cu2O microcubes were transformed into Cu9S5@MoS2 hollow microboxes through a hydrothermal process. The MoS2 nanosheets loaded on the microboxes exhibited a high 1T phase ratio and advantageous structure for conducting networks and interfacial polarization. The composite of Cu9S5@MoS2 with paraffin showed good EMW absorption performance at 40 wt%.