Microwave absorption performance and broadband absorption optimization of reduced graphene oxide

Hairong CHU, Mengyu ZHOU, Shuangqiang SHI, Sue REN

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Journal of Materials Engineering ›› 2025, Vol. 53 ›› Issue (3) : 117-124. DOI: 10.11868/j.issn.1001-4381.2024.000167
RESEARCH ARTICLE

Microwave absorption performance and broadband absorption optimization of reduced graphene oxide

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Abstract

The microwave absorption performances of different contents and superimposed layers of large sheet reduced graphene oxide （rGO） absorbers have been studied， and the rGO is obtained from the thermal reduction of graphene oxide by the improved Hummers method. The calculated results indicate that the absorption performance is first enhanced and then weakened with the increased rGO content. When the mass fraction of rGO is 1.0% and the thickness is 2.2 mm， the effective absorption bandwidth （EAB，≤-10 dB） reaches 5.4 GHz （12.0-17.4 GHz）. When the mass fraction of rGO is 1.5% and the thickness is 1.8 mm， the EAB reaches 5.0 GHz （13.0-18.0 GHz）. Because the EAB of the single-layer rGO absorbing material is narrow， an improved genetic algorithm has been used to optimize the EAB of multi-layer superimposed rGO absorbing material， with the different content rGO absorbing material as the material library. The EAB of multi-layer rGO absorbing material is significantly improved after optimization. The 3-layer rGO absorbing material with a thickness of 3.94 mm exhibits the widest EAB of 11.5 GHz （6.5-18.0 GHz）. This study greatly improves the ultra-wide band absorption performance of graphene， which has important scientific significance and engineering value.

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reduced graphene oxide / microwave absorbing / broadband absorption optimization / genetic algorithm

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Hairong CHU , Mengyu ZHOU , Shuangqiang SHI , et al. Microwave absorption performance and broadband absorption optimization of reduced graphene oxide. Journal of Materials Engineering. 2025, 53(3): 117-124 https://doi.org/10.11868/j.issn.1001-4381.2024.000167

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