A hybrid comprised of porous carbon nanofibers and rGO for efficient electromagnetic wave absorption

• Published in: Carbon (New York) 2020-02, Vol.157, p.703-713
• Main Authors: Abdalla, Ibrahim, Elhassan, Ahmed, Yu, Jianyong, Li, Zhaoling, Ding, Bin
• Format: Article
• Language: English
• Subjects: Absorption; Carbon fibers; Composite materials; Composite structures; Conductivity; Contact loss; Electric contacts; Electrical resistivity; Electromagnetic radiation; Electromagnetic wave absorption; Electrospinning; Graphene; Magnetic and dielectric losses; Magnetic permeability; Membranes; Nanofibers; Nanofibrous composite; Nanoparticles; Porous materials; Porous structure
• ISSN: 0008-6223; 1873-3891
• DOI: 10.1016/j.carbon.2019.11.004

The quick improvement of up-to-date communication technology has generated ubiquitous electromagnetic wave (EMW), which poses a significant hazard to environment and human health. One of the key challenges associated with EMW is to develop highly lightweight and efficient adsorption materials that are able to alleviate the unfavorable interferences in wide-ranging frequency. Herein, we fabricated a hybrid porous carbon nanofibers (CNFs) membrane combined with reduced graphene oxide (rGO) and magnetic nanoparticles by electrospinning process followed by calcination. The composite membrane exhibited high-efficiency absorbing abilities due to its particular porous structure and introduced components in the final sample. Specifically, both cobalt and iron nanoparticles captured into CNFs are advantageous to the electrical conductivity of the membrane by lessening the contact loss via creating the metal-metal crossing points within membrane. The introduced components are capable of enhancing the absorption performance due to the improved permittivity (εr) and permeability (μr) in the composite structure. The minimum reflection loss (RL min) value was demonstrated to be −43.60 dB at 5.84 GHz with a matching thickness of 5 mm. The synthesis of nanofibrous composite in this work identifies a new direction to fabricate advanced EMW absorption materials towards broad practical applications. A hybrid comprised of porous carbon nanofibers and rGO were developed for efficient electromagnetic wave absorption. The composite membranes exhibited high-efficiency absorbing abilities due to their particular porous structure and introduced components in the final sample. The minimum RL value was demonstrated to be −43.60 dB at a frequency of 5.84 GHz with a matching thickness of 5 mm. This work identifies a new direction to fabricate advanced EMW absorption materials towards broad practical applications. [Display omitted]