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

• Published in: Acta metallurgica sinica : English letters 2023-09, Vol.36 (9), p.1559-1571
• Main Authors: Shen, Jiacheng, Zhang, Xinrui, Yang, Chunguang, Lei, Zixuan, Li, Shuaizhen, Ma, Lin, Geng, Dianyu, Ma, Song, Liu, Wei, Zhang, Zhidong
• Format: Article
• Language: English
• Subjects: Absorbers; Absorption; Antiinfectives and antibacterials; Bacteria; Characterization and Evaluation of Materials; Chemistry and Materials Science; Communication; Corrosion and Coatings; E coli; Electromagnetic radiation; Graphite; Humidity; Industrial development; Materials Science; Metallic Materials; Nanocomposites; Nanotechnology; Nickel; Organometallic Chemistry; Permeability; Radiation; Spectroscopy/Spectrometry; Spectrum analysis; Tribology
• ISSN: 1006-7191; 2194-1289
• DOI: 10.1007/s40195-023-01580-1

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.