Acta Metallurgica Sinica (English Letters) ›› 2023, Vol. 36 ›› Issue (9): 1559-1571.DOI: 10.1007/s40195-023-01580-1

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Bifunctional Two-Dimensional Nanocomposite with Electromagnetic Wave Absorption and Anti-bacterial Performance

Jiacheng Shen1,2, Xinrui Zhang1,2, Chunguang Yang1, Zixuan Lei1,2, Shuaizhen Li1,2, Lin Ma1,2, Dianyu Geng1, Song Ma1(), Wei Liu1, Zhidong Zhang1   

  1. 1Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
    2School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
  • Received:2023-04-10 Revised:2023-05-02 Accepted:2023-05-09 Online:2023-09-10 Published:2023-08-25
  • Contact: Song Ma,songma@imr.ac.cn

Abstract:

In current electronic information era, the complex application circumstance of 5G devices pursues the exploration of multi-functional electromagnetic wave (EMW) absorbent materials and it has become the crucial focus in industrial development. A two-dimensional (2D) graphite nanosheet decorated by nickel nanocapsules (2D graphite/Ni@C nanocomposite) was fabricated to possess the EMW absorption and the Escherichia coli (E. coli) anti-bacterial performance simultaneously. By adjusting the filling ratio and injecting nitrogen doping, the value of minimum reflection loss is  − 36.08 dB and the effective absorption bandwidth reaches to 5.12 GHz (from 11.4 to 16.52 GHz) with the mass ratio of 30 wt% and the absorber thickness of 2 mm. This 2D nanocomposite simultaneously gets an excellent anti-bacterial function expressing an E. coli anti-bacterial rate of 92% during 24 h which is significantly correlated to the interaction between the nanostructure of the 2D nanographite and the nickel ion released from Ni@C nanocapsules. This work provides a new approach to develop a promising 2D anti-bacterial EMW absorber.

Key words: Bifunctional electromagnetic wave absorbent material, Nickel-based two-dimensional nanocomposite, E. coli anti-bacterial performance