Lightweight N-doped C/ZnO composites prepared from zinc-based acrylate resin precursors for electromagnetic wave absorption at 2-18 GHz

The chemical doping of carbon and heteroatoms is expected to be a promising strategy for enhancing the absorption properties of electromagnetic waves. In this work, N-doped C/ZnO composites (CN/ZnOx-Ts) were originally designed and synthesized by using temperature-controllable calcination engineering with zinc-based acrylate resins containing N atoms as precursors. The best electromagnetic wave absorption (EMWA) performance for the composites was obtained by changing the composition and calcination temperature of the acrylate resin precursor. A CN/ZnO0.064-900 composite prepared using a precursor containing acrylonitrile (0.4 mol) and ZnO (0.064 mol) calcined at 900 degrees C showed a minimum reflection loss (RLmin) of - 43.15 dB at 3.0 mm and 9.68 GHz, with an effective absorption bandwidth (EAB) ranging from 5.1 GHz to 18 GHz achieved by adjusting the thickness of the absorber. This method for preparing novel N-doped carbon-based materials provides the possibility for the mass production of highly efficient absorbers. (C) 2021 Published by Elsevier B.V.

Automated summary

This study successfully designed and synthesized N-doped C/ZnO composites using temperature-controllable processing, and achieved the best electromagnetic wave absorption performance by altering the composition and calcination temperature.