Fe3O4/MWCNT/TiO2 nanocomposites as excellent microwave absorber material

Siti Nikmatul Qoidah, ST T. Ulfawanti Intan Subadra, Ahmad Taufiq*, Nandang Mufti, Sunaryono Sunaryono, Nurul Hidayat, Erfan Handoko, Mudrik Alaydrus, Tahta Amrillah

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The innovation in microwave absorbing material has increased exponentially to support telecommunication technology. Fe3O4 could be one candidate for absorber material; however, Fe3O4 still has lower permeability at high frequency and high density; thus, it fails to meet one of MAM's ideal characteristics. In this research, we try to make an excellent microwave absorber material by combining conventional microwave absorber Fe3O4 with multi-walled carbon nanotubes and TiO2 (Fe3O4/MWCNT/TiO2 nanocomposites). Structural characterization results strongly suggested that the Fe3O4/MWCNT/TiO2 nanocomposites have been successfully fabricated. The nanocomposite presented superparamagnetic properties and has a band gap energy range between 2.236 and 2.255 eV, which is suitable for microwave absorbers. We found that increased TiO2 concentration in the nanocomposite enhanced the microwave absorption performance. The maximum reflection loss of this study was 44.3 dB with thicknesses of 20 mm, in which 99% of the microwave was absorbed by Fe3O4/MWCNT/TiO2, indicating excellent microwave absorption performance.

Original languageEnglish
Article number172590
JournalJournal of Alloys and Compounds
Volume970
DOIs
Publication statusPublished - 5 Jan 2024
Externally publishedYes

Keywords

  • FeO/MWCNT/TiO
  • Microwave absorber
  • Nanocomposite
  • Reflection loss
  • Superparamagnetic

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