Sandwich-LikeFe&TiO2@CNanocompositesDerivedfromMXene/Fe-MOFsHybridsforElectromagneticAbsorption

Electromagnetic pollution has been causing a series of problems in people's life, and electromagnetic absorbers with lightweight and broad absorbing bandwidth properties are widely desired. In this work, novel sandwich-like 2 D laminated Fe&TiO2 nanoparticles@C nanocomposites were rationally designed and successfully developed from the MXene–MOFs hybrids. The formation of Fe and rutile-TiO2 nanoparticles sandwiched by the two-dimensional carbon nanosheets pro-vided strong electromagnetic energy attenuation and good impedance matching for electromagnetic wave（EMW） absorption. As expected, the nanocomposites achieved a broad e ective absorption bandwidth of 6.5 GHz at a thickness of only 1.6 mm and the minimum reflection loss（RL） value of-51.8 dB at 6.6 GHz with a thickness of 3 mm. This work not only provides a good design and fabricating concept for the laminated metal and functional nanoparticles@C nanocomposites with good EMW absorption, but also o ers an important guideline to fabricate various two-dimensional nanocomposites derived from the MXene precursors.