Covalent Bonding\nof MXene/Reduced Graphene Oxide Composites\nfor Efficient Electromagnetic Wave Absorption

Abstract

Due to their high conductivity and unique surface chemical\ncharacteristics,\nMXene and reduced graphene oxide (rGO) have received a great deal\nof attention in the field of electromagnetic wave absorption (EMA).\nThis study describes the covalent modification of rGO with amino-functionalized\nMXene to create an electromagnetic absorbent material called MXene-rGO\ncomposite. After amidation, an amide bond successfully assembles MXene\nand rGO. The absorber performs admirably when the mass ratio of MXene\nto rGO is 1:2 (sample MG-3). With a thickness of 2.7 mm, the best\nreflection loss (R_L) is −47.98 dB at 6.4 GHz. Additionally,\nthe best effective absorption bandwidth (EAB) (R_L< −10\ndB) is 4.08 GHz (11.84–15.92 GHz) with a 1.4 mm matching thickness.\nThe performance of the EMA can be obtained by adjusting the dielectric\nparameters and the migration rate of the electrons using the covalent\nbond as a stable carrier channel. The high dielectric loss, superior\nimpedance matching, and strong attenuation ability contribute to the\ngreat absorption performance.