Abstract
Ti3C2/NiFe2O4 and Ti3C2/FeNi3 composites were prepared by hydrothermal and hydrazine reduction process, respectively. Effects of components and surface functionalization on dielectric/magnetic polarization of samples were studied systematically. The results indicate that the surface charge states of Ti3C2 effectively modify the dielectric performance of the corresponding samples. In Ti3C2 sheets sample, the effective absorption bandwidth (EAB) is over 2.88 GHz at thickness of 0.93 mm. In Ti3C2/NiFe2O4 composite, the EAB is about 3.92 GHz at 1.92 mm thickness. In case of Ti3C2/FeNi3 composite, its EAB exceeds 5.68 GHz at 1.59 mm thickness. Such significantly improved wave absorption performance is attributed to the additional strong interface electromagnetic loss and the optimized impedance matching. In particularly, the additional polarization induced by the charge transfer between the heterogeneous interfaces in Ti3C2/FeNi3 composite has drastic positive effects on realizing multimode synergistic attenuation of the electromagnetic energy. This work demonstrates that Ti3C2/FeNi3 composite is a novel advanced absorbent with a promising application.
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