Confined tailoring of CoFe2O4/MWCNTs hybrid-architectures to tune electromagnetic parameters and microwave absorption with broadened bandwidth

• Published in: Ceramics international 2022-04, Vol.48 (7), p.9569-9578
• Main Authors: Ashfaq, M. Zeeshan, Ashfaq, Aamna, Majeed, Muhammad K., Saleem, Adil, Wang, Shan, Ahmad, Muhammad, Hussain, Muhammad Muzammal, Zhang, Yujun, Gong, Hongyu
• Format: Article
• Language: English
• Subjects: CoFe2O4; Effective absorption bandwidth; Hybrid composite; MWCNTs; Reflection loss
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/j.ceramint.2021.12.155

Multi-walled carbon nanotubes (MWCNTs) are highly alluring as an electromagnetic (EM) wave absorber owing to their multi-dimensional structure, high chemical stability, low density, and significant conduction loss, which provide great promises as an excellent EM wave absorber in practical applications. Herein, a simple and controllable solvothermal technique is applied to synthesize cobalt ferrite/MWCNTs (CoFe2O4/MWCNTs) hybrid composite. Various analytical techniques were used to investigate the composition, morphological structure, and electromagnetic parameters of the as-prepared hybrid composite. The obtained results revealed that, a strong network of CoFe2O4 microspheres interweaved with MWCNTs in the prepared hybrid composite. The resultant CoFe2O4/MWCNTs composites achieve a minimum reflection loss (RLmin) of −50.80 dB at a thickness of 4.2 mm and effective absorption bandwidth (EAB) of 3.36 GHz at a thickness of 1.6 mm exhibiting the superior RLmin compared to the typical magnetic composite derived absorbers. This research advocates the precise development and designing of unique MWCNTs-based composites as a high-efficient and lightweight electromagnetic wave absorber.