Achieving superior electromagnetic wave absorbers with 2D/3D heterogeneous structures through the confinement effect of reduced graphene oxides

Yao Li, Yongheng Jin, Junye Cheng, Yiru Fu, Jing Wang, Liquan Fan, Deqing Zhang, Ping Zhang, Guangping Zheng, Maosheng Cao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

44 Citations (Scopus)

Abstract

Currently, the development of low-thickness, high-efficiency electromagnetic wave (EMW) absorbing materials for practical applications is of particular importance. In this work, we used a simple one-step hydrothermal method to synthesize, for the first time, heterostructured materials with special multidimensional heterostructures by exploiting the confinement effect of grapheneIn this work, a simple one-step hydrothermal method is employed to synthesize composites with a special heterogeneous structure through utilizing the confinement effect of graphene. NbS2 nanosheets are grown directionally along two-dimensional (2D) reduced graphene oxide (rGO) nanosheets and assembled into nanospheres on the nanosheets, resulting in a unique 2D/3D heterogeneous structure. This peculiar 2D/3D heterogeneous structure with intrinsic conductive network inside the rGO effectively enhances the EMW absorption performance of the heterostructure, with a minimum reflection loss (RL) value of −47.86 dB at 11.04 GHz at a thin thickness of 2.28 mm, and a minimum RL value of −38.64 dB at 15.28 GHz at a thinner thickness of 1.73 mm, and achieves a broadband effective absorption (RL < -10 dB) over 5 GHz, covering almost the whole Ku-band. The results reveal the influence of 2D/3D heterogeneous interfaces and the confinement effect of intrinsic conductive network on the improvement of EMW absorption performance, providing a new idea for the development of a new generation of ultrathin EMW absorption materials with high performance.

Original languageEnglish
Article number118245
JournalCarbon
Volume213
DOIs
Publication statusPublished - Sept 2023

Keywords

  • 2D/3d heterogeneous structure
  • Confinement effect
  • Electromagnetic wave absorption
  • Hybrids

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science

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