Abstract
The construction of thin electromagnetic wave (EMW) absorbing materials with strong absorption, low filler load and broadband is significant for attenuating EMWs. In this work, 2-dimensional-1-dimensional (2D–1D) SnO/carbon nanotube (CNT) nanohybrids were prepared successfully by a facial hydrothermal method. The excellent EMW absorption performance of SnO/CNT hybrids can be achieved by adjusting CNT content. SnO/CNT exhibits excellent EMW absorption properties, including a minimum reflection loss (RLmin) of − 68.83 dB (1.44 mm) and a maximum effective absorption bandwidth (EAB) of 4.53 GHz (12.71–17.24 GHz, 1.49 mm). In addition, to analyze the mechanism of EMW absorption, the electronic properties of heterogeneous interfaces (SnO and CNT) were calculated by density functional theory (DFT). Both experiments and theory results prove that the synthesized SnO/CNT nanohybrids have excellent electromagnetic wave loss ability, which is attributed to rich dipole polarization, interface polarization, and good conduction loss. Therefore, SnO/CNT nanohybrids have been proven to be an ultralight, efficient and promising EMW absorber.
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