Reduced Graphene Oxide/MXene/FeCoC Nanocomposite Aerogels Derived from Metal–Organic Frameworks toward Efficient Microwave Absorption

Abstract

Efficient electromagnetic wave absorption (EMA) materials are urgently needed to solve the increasingly serious electromagnetic pollution problems in both the modern military and civil fields. Multidimensional and multielement electromagnetic absorbing materials exhibit enormous potential in EMA applications owing to the combination of material and structure advantages. Herein, a three-dimensional (3D) reduced graphene oxide/Ti 3 C 2 T x MXene/iron−cobalt alloy carbon (rGO/MXene/FeCoC) nanocomposite aerogel derived from FeCo-ZIF metal−organic frameworks (MOFs) was successfully fabricated by combining freezedrying and pyrolysis methods. The minimum reflection loss (RL min ) of the optimized rGO/MXene/FeCoC-30% is −61.4 dB and the effective absorption band (EAB, <−10 dB) reaches up to 4.95 GHz with a matching thickness of 1.55 mm. The outstanding EMA performance benefits the excellent impedance matching, the rich multiple reflections and scattering in three-dimensional porous structures, and the favorable dielectric-magnetic synergistic losses endowed by graphene, MXene, and FeCoC nanoparticles. The successful construction of the multicomponent rGO/MXene/FeCoC nanocomposite aerogel provides a prospective direction for the development of high-efficient electromagnetic absorbing materials.

Nanoporous Nitrogen-Doped Carbon Aerogels for Electromagnetic Wave Absorption

“…With the advent of the 5G era, the rapid development of communication technology and electronic equipment has not only brought convenience to social development but also produced some undesirable effects such as electromagnetic interference and pollution. , Electromagnetic wave (EMW) can not only interfere with the standard operation of highly sensitive electronic facilities but even affect people’s health. , With the aim of minimizing these negative effects caused by EMW, lots of scientific researchers had devoted themselves to the development of new EMW absorbing materials with ultrathin, low filling rate, broadband, and strong absorption properties. − In some recent studies, carbon-based materials with abundant nanopores and a large specific surface area have gradually become excellent EMW absorbers. such as graphite, , carbon nanotubes, − graphene, − carbon aerogels, etc. , …”