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<p>Component regulation and microstructural design are central to optimizing the performance of microwave-absorbing materials, yet fabrication routes that simultaneously offer low-cost, simple processing, and superior microwave absorption capabilities are the ones that hold the greatest promise for large-scale deployment. In this study, ZnO nanoparticles/reduced graphene oxide (RGO)-layered composites were prepared by a simple two-step method combining in-situ solution drying and interface reaction, with controllable regulation of the ZnO nanoparticle content. The effects of the laminated composite structure, ZnO content, calcination temperature, and the filling content of ZnO/RGO composite added on the electromagnetic parameters and microwave absorption performance were investigated in detail. Notably, the prepared ZnO/RGO composites achieved an effective absorption bandwidth of 7.5&#xa0;GHz within the frequency range of 10.5–18&#xa0;GHz. Moreover, within a wide range of thickness (2.3–4.1&#xa0;mm) and filling content (20–33&#xa0;wt%), the prepared ZnO/RGO composites all exhibited excellent microwave absorption performance, making them highly suitable for large-scale production and possible practical applications. Furthermore, radar cross-section (RCS) simulations further verified that the ZnO/RGO composite exhibited excellent radar wave attenuation performance in a real environment. Given its simple and widely applicable preparation method, as well as its excellent and controllably adjustable absorption performance, this research provides a new reference for the rational construction of low-cost, broadband, and highly efficient graphene-based absorbing materials.</p>

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Facile construction of ZnO nanoparticles/reduced graphene oxide layered composite as a broadband microwave absorbent

  • 期刊论文

  • 发表日期：

    2026年3月21日

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  • Wanxi Li,
  • Yali Zhao,
  • Boqiong Li,
  • Fang Guo,
  • Mengyao Ma,
  • Baoliang Lv,
  • Yingfen Wang,
  • Hengliang Liang

摘要

Component regulation and microstructural design are central to optimizing the performance of microwave-absorbing materials, yet fabrication routes that simultaneously offer low-cost, simple processing, and superior microwave absorption capabilities are the ones that hold the greatest promise for large-scale deployment. In this study, ZnO nanoparticles/reduced graphene oxide (RGO)-layered composites were prepared by a simple two-step method combining in-situ solution drying and interface reaction, with controllable regulation of the ZnO nanoparticle content. The effects of the laminated composite structure, ZnO content, calcination temperature, and the filling content of ZnO/RGO composite added on the electromagnetic parameters and microwave absorption performance were investigated in detail. Notably, the prepared ZnO/RGO composites achieved an effective absorption bandwidth of 7.5 GHz within the frequency range of 10.5–18 GHz. Moreover, within a wide range of thickness (2.3–4.1 mm) and filling content (20–33 wt%), the prepared ZnO/RGO composites all exhibited excellent microwave absorption performance, making them highly suitable for large-scale production and possible practical applications. Furthermore, radar cross-section (RCS) simulations further verified that the ZnO/RGO composite exhibited excellent radar wave attenuation performance in a real environment. Given its simple and widely applicable preparation method, as well as its excellent and controllably adjustable absorption performance, this research provides a new reference for the rational construction of low-cost, broadband, and highly efficient graphene-based absorbing materials.