Construction of a hollow nickel–magnesium ferrite decorated nitrogen-doped reduced graphene oxide composite aerogel for highly efficient and broadband microwave absorption

Shu, Ruiwen; Xu, Leilei; Zhao, Ziwei

doi:10.1039/d3tc04067d

Cited by 7 publications

(1 citation statement)

References 57 publications

(132 reference statements)

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“…In addition, the incorporation of miscellaneous elements (such as nitrogen, phosphorus, boron, etc.) is also a simple and effective way to increase material defects. − Sun et al synthesized N/B codoped reduced graphene oxide via a hydrothermal self-assembly process, and the minimum reflection loss reached −52 dB when the load was 5 wt % and the thickness was 2.8 mm. Quan et al and Liu et al prepared a series of lightweight nitrogen-doped GR EMW absorbers, and the effective absorption amount was selected by adjusting the amount of dopant.…”

Section: Introductionmentioning

confidence: 99%

Nanoporous Nitrogen-Doped Carbon Aerogels for Electromagnetic Wave Absorption

Zhang,

Wang,

Zhu

et al. 2024

ACS Appl. Nano Mater.

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Carbon-based foam or aerogels show prominent potential as electromagnetic wave (EMW) absorption materials owing to their light weight, low density, abundant pore structure, and good electrical conductivity. In this work, a series of nitrogendoped carbon aerogels with abundant micropore and nanosized pores, prepared based on carboxymethyl cellulose sodium (CMC) hydrogels and via freeze-drying and pyrolysis, exhibit good EMW absorption performances. Through simply adjusting the additive amount of dicyandiamide (DCD), nitrogen-doped CMC derived carbon aerogels (NCCAs) with various morphologies, pore structures, and chemical compositions are obtained. The synthesized NCCA10 and NCCA20 achieve a minimum reflection loss (RL min ) of −56.05 dB (2.8 mm) and −39.4 dB (1.7 mm) and effective absorption bandwidth (EAB) of 2.88 GHz at 2.7 mm and 4.88 GHz at 1.6 mm, respectively. The EMW absorption mechanism implies that the enhanced performance of NCCAs can be ascribed to the synergistic effect of dielectric loss, multiple reflection loss, conductive loss, and impedance adjustment. This study provides a good way to explore EMW adsorption materials with a broad bandwidth and good absorption behavior via nitrogen element doping.

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