Preparation and microwave absorption properties of tellurium doped black phosphorus nanoflakes and graphite nanoflakes composites

In this study, the TBG composites (composites of tellurium doped black phosphorus nanoflakes (Te/BP NFs) with graphite nanoflakes (GNFs)) were successfully prepared which showed excellent electromagnetic wave absorption performance. The permittivity and dielectric loss tangent of TBG composites increased with the increase of GNFs content. When the ratio of Te/BP NFs to GNFs was 1:1 (TBG-1-1 composite), the reflection loss reached -10 dB under the thickness range of 1-3 mm and frequency range of 5.25-18 GHz, and the minimum reflection loss was -31.07 dB at the frequency of 4.14 GHz. Moreover, the relationship between minimum reflection loss frequency and thickness of TBG-1-1 composite conformed to the lambda/4 impedance matching model. Therefore, the TBG composites have great potential in the application of high -frequency electromagnetic wave fields.(c) 2023 Elsevier B.V. All rights reserved.

Automated summary

In this study, the researchers successfully prepared TBG composites composed of tellurium doped black phosphorus nanoflakes and graphite nanoflakes, which exhibited excellent electromagnetic wave absorption performance. The permittivity and dielectric loss tangent of the composites increased with the increase of graphite nanoflakes content. The TBG-1-1 composite with a ratio of 1:1 of Te/BP NFs to GNFs achieved a reflection loss of -10 dB under the thickness range of 1-3 mm and frequency range of 5.25-18 GHz, with a minimum reflection loss of -31.07 dB at 4.14 GHz.