Abstract
Electromagnetic wave (EMW) absorption materials have tremendous potential in protecting national security and human health from harmful electromagnetic irradiation. However, it is still a great challenge to achieve lightweight and broadband high-performance EMW absorption. Integrating layered double hydroxides (LDH) with porous biomass materials is a promising approach to construct magnetic metal/porous carbon composites as highly efficient EMW absorption materials due to their synergy loss, lightweight, and low-cost characteristics. Herein, FeNi alloy nanosheet array/porous carbon (FeNi/PC) hybrids derived from FeNi/loofah sponges have been prepared by hydrothermal and subsequent carbonization processes. As expected, the FeNi/PC hybrids achieve a high reflection loss of −58.3 dB at 2.98 mm and exhibits a broad effective absorption bandwidth (EAB) of 6.72 GHz with 8 wt % filler content. The outstanding EMW absorption performance of the FeNi/PC hybrid provides a new insight into the design of biomass-based composite materials as lightweight and broadband high-performance EMW absorbers.
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