In Situ Loading of Ni3ZnC0.7 Nanoparticles with Carbon Nanotubes to 3D Melamine Sponge Derived Hollow Carbon Skeleton toward Superior Microwave Absorption and Thermal Resistance

Carbon skeleton/carbon nanotubes/Ni3ZnC0.7 composites are successfully prepared by in situ growth of Ni3ZnC0.7 and CNTs on 3D melamine sponge carbon. The composite shows lightweight characteristics and can quickly recover to its original state after being pressed. The bandwidth (RL ≤ -10 dB) for the S60min composite reaches 9.3 GHz and a quite low thermal conductivity of 0.0 9075 W m−1·K can be achieved. AbstractThe simple and low-cost construction of a 3D network structure is an ideal way to prepare high-performance electromagnetic wave (EMW) absorption materials. Herein, a series of carbon skeleton/carbon nanotubes/Ni3ZnC0.7 composites (CS/CNTs/Ni3ZnC0.7) are successfully prepared by in situ growth of Ni3ZnC0.7 and CNTs on 3D melamine sponge carbon. With the increase of  precursor, Ni3ZnC0.7 nanoparticles nucleate and catalyze the generation of CNTs on the surface of the carbon skeleton. The minimum reflection loss (RL) value of the S60min composite (loading time of 60 min) reaches -86.6  dB at 1.6 mm and effective absorption bandwidth (EAB, RL≤−10 dB) is up to 9.3 GHz (8.7–18 GHz). The 3D network sponge carbon with layered micro/nanostructure and hollow skeleton promotes multiple reflection and absorption mechanisms of incident EMW. The N-doping and defects can be equiva lent to an electric dipole, providing dipole polarization to increase dielectric relaxation. The uniform Ni3ZnC0.7 nanoparticles and CNTs play a key role in dissipating electromagneti...

Source: Small - April 22, 2024 Category: Nanotechnology Authors: Ruilin Liu, YuKun Wang, Peng Wang, Hideo Kimura, Baolei Wang, Chuanxin Hou, Xueqin Sun, Wei Du, Xiubo Xie Tags: Research Article Source Type: research