Lightweight Honeycomb rGO/Ti<sub>3</sub>C<sub>2</sub>T<i><sub>x</sub></i> MXene Aerogel without Magnetic Metals toward Efficient Electromagnetic Wave Absorption Performance
Yunfeng Bao, Siyao Guo, Ying Li, Zhiqing Jia, Hailong Guan, Dongyi Lei, Jizhou Chen, Baomin Zhong, Zhihong Li
Abstract
Nonmagnetic electromagnetic wave (EMW)-absorbing materials have aroused research interest on account of their light weight, chemical stability, and excellent dielectric property. However, it is still a great challenge to fabricate one kind of nonmagnetic EMW-absorbing materials with a unique structure and excellent EMW-absorbing performance. Herein, lightweight (∼3.2 mg/cm 3 ) honeycomb rGO/Ti 3 C 2 T x MXene aerogel nanocomposites without magnetic metals were successfully fabricated via a green and convenient method in our work. Surprisingly, when the filler loading is only 5 wt % under the coaxial test, the minimum reflection loss (RL) value of the rGO/MXene-1:0.5 aerogel nanocomposite is −74.01 dB (99.99997% wave absorption) at 14.77 GHz with the thickness of only 1.80 mm. The effective absorption band (EAB) value under the arch test covers the whole C band, X band, and most of the C band. Furthermore, computer simulation technology (CST) data further demonstrated that the rGO/MXene-1:0.5 aerogel nanocomposite-covered model owns the smallest radar cross section (RCS) value, indicating that it possesses favorable radar wave attenuation capacity. Thus, the nonmagnetic honeycomb rGO/Ti 3 C 2 T x MXene aerogel nanocomposites can be promising candidates for designing efficient lightweight EMW absorbers.