MOF-derived core-shell structured Cu9S5/NC@Co3S4/NC composite as a high-efficiency electromagnetic wave absorber

Huanhuan Zhu, Jie Liang, Xiaoguang Jiao, Ruru Fu, Qingze Jiao, Caihong Feng, Hansheng Li, Yaoyuan Zhang, Yun Zhao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Constructing specific microstructures and designing multicomponent composites are regarded as effective approaches to obtaining high-efficiency electromagnetic (EM) wave absorbing materials. Herein, core-shell structured Cu9S5/N-doped carbon@Co3S4/N-doped carbon (Cu9S5/NC@Co3S4/NC) composites derived from Cu3(BTC)2@ZIF-67 were synthesized by facile carbonization and sulfidation processes. The Cu9S5 particles are embedded in the interior and surface of the carbon skeleton, and the Co3S4/NC particles are uniformly distributed on the surface of the carbon skeleton. Compared with Cu9S5/NC and Co3S4/NC, the Cu9S5/NC@Co3S4/NC composite displays improved impedance matching properties and much better EM wave absorbing properties. The minimum reflection loss (RLmin) reaches −41.6 dB at 10.52 GHz with a thickness of 2 mm. In addition, the effective absorption bandwidth (EAB, RL < −10 dB) is 4.08 GHz (12.73–16.81 GHz) with un ultrathin thickness of 1.5 mm. This work offers a facile strategy for synthesizing MOF-derived metal sulfides/carbon composites as EM wave absorption materials with strong absorption properties, a wide absorption bandwidth and ultrathin thickness.

Original languageEnglish
Pages (from-to)9534-9542
Number of pages9
JournalCeramics International
Volume49
Issue number6
DOIs
Publication statusPublished - 15 Mar 2023

Keywords

  • Core-shell
  • CuS/NC@CoS/NC
  • Electromagnetic wave absorption
  • MOF

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