Metal–Organic Framework-Based PB@MoS₂ Core–Shell Microcubes with High Efficiency and Broad Bandwidth for Microwave Absorption Performance

Abstract

In this study, we fabricated a unique core–shell structure of PB@MoS2 microcubes for the first time (PB stands for Prussian blue) and examined the microwave absorption performance in the frequency range of 2–18 GHz. The results showed the hybrid PB@MoS2 core–shell structure has an excellent microwave absorbing property. The minimum reflection loss value was found to be −42.83 dB with a thickness of 2.1 mm at 16.46 GHz and −42.06 dB at a frequency of 11.44 GHz with a thickness of 2.5 mm for the 40 wt % loading of PB@MoS2/wax. The effective absorbing bandwidth (less than −10 dB) could reach 7.31 GHz at 2.4 mm, 7.44 GHz (9.82–17.26 GHz) at a thickness of 2.5 mm, and 7.17 GHz at a thickness of 2.6 mm. The results indicated that the hybrids of PB@MoS2 core–shell microcubes were promising microwave-absorbing materials formed using an inexpensive and facile synthesis process, which can be an excellent candidate for efficient electromagnetic wave-absorbing applications.

Carbon-Based MOF Derivatives: Emerging Efficient Electromagnetic Wave Absorption Agents

“…CoFe@C@MnO 2 nanocomposite displayed a minimum RL value of − 64 dB at 15.6 GHz with the thickness of 1.3 mm and an EAB of 9.2 GHz at the thickness of 1.6 mm. Furthermore, Zhao et al reported Prussian blue@MoS 2 synthesized by solvothermal method [ 154 ]. The minimum RL value of the nanocomposite could achieve − 42.83 dB with the thickness of 2.1 mm at 16.46 GHz.…”

MoS2-Decorated/Integrated Carbon Fiber: Phase Engineering Well-Regulated Microwave Absorber

“…Moreover, the miniaturization and integration of electronic circuits and components put forward the request of flexible portable microwave absorption electronic devices [5,6]. Two-dimension (2D) materials, such as reduced graphene oxide (RGO) [7][8][9][10], MoS 2 [11][12][13][14][15], and new member Mxene [16][17][18][19], are usually applied as microwave absorber owing to their high specific surface area and abundant functional groups as well as defects, which will enhance the propagation paths of incident electromagnetic wave (EMW) inside absorbers by scattering effect and increase the loss through polarization relaxation loss. As one of the 2D material, MoS 2 has adjustable electrical property and can change between insulators and semiconductor metals.…”

Diverse Metal–Organic Framework Architectures for Electromagnetic Absorbers and Shielding

“…For instance, a unique PB@MoS 2 microcube with a core‐shell structure was fabricated for the first time, exhibiting an outstanding absorption performance. [ 83 ] The minimum RL was 42.83 dB at 2.1 mm and 16.46 GH, and the −10 dB bandwidth was 7.44 GHz at 2.5 mm.…”