Cobalt phosphide decorated on reduced graphene oxide with enhanced microwave absorption performance

The application of microwave absorbing materials is one of the important means to reduce electromagnetic pollution. Transition metal phosphides as absorbers with high conductivity attract researchers' interest. Therefore, in this paper, the novel cobalt phosphide wrapped by reduced graphene oxide (CoP/RGO) were prepared by simple hydrothermal and phosphating reaction. Meanwhile, the introduction of RGO is beneficial to enhance the conductive loss and polarization loss of materials. Compared with most of the reported transition metal phosphate-based absorbents, CoP/RGO has a better microwave absorption (MA) performance. The minimum reflect loss (RLmin) value can reach - 52.60 dB with 2.05 mm, and the maximum effective absorption bandwidth (EAB, RL < -10 dB) can reach 5.04 GHz at 2.25 mm. The superior MA performance of CoP/RGO composites makes it possible to be a candidate as an absorber. (c) 2022 Elsevier B.V. All rights reserved.

Automated summary

In this paper, the authors prepared a novel cobalt phosphide wrapped by reduced graphene oxide (CoP/RGO) by simple hydrothermal and phosphating reaction. The introduction of RGO enhanced the conductive loss and polarization loss of materials, resulting in better microwave absorption performance compared to most reported transition metal phosphate-based absorbents. The CoP/RGO composites demonstrated a minimum reflect loss value of -52.60 dB and a maximum effective absorption bandwidth of 5.04 GHz, making it a promising candidate as an absorber material.