@article{Yan2024, 
author = {Jiatong Yan and Ce Cui and Wenhao Bai and Hong Tang and Ronghui Guo},
title = {Building of lightweight Nb2CTx MXene@Co nitrogen-doped carbon nanosheet arrays@carbon fiber aerogels for high-efficiency electromagnetic wave absorption in X and Ku bands inspired by sea cucumber},
year = {2024},
journal = {Nano Research},
volume = {17},
number = {11},
pages = {9261-9274},
keywords = {bionic sea cucumber, Nb2CTx MXene, Co nitrogen-doped carbon nanosheet arrays, carbon fiber aerogel, lightweight, electromagnetic wave absorption},
url = {https://www.sciopen.com/article/10.1007/s12274-024-6898-5},
doi = {10.1007/s12274-024-6898-5},
abstract = {The problems of electromagnetic wave (EMW) pollution in X and Ku bands (8–18 GHz) are becoming more and more serious. Therefore, it is urgent to design EMW absorbing materials with high-efficiency such as thin thickness, lightweight, wide bandwidth and strong EMW absorption. Inspired by the biomorph of sea cucumber, Nb2CTx MXene@Co nitrogen-doped carbon nanosheet arrays@carbon fiber aerogels (Nb2CTx@Co-NC@CFA, Nb2CTx = niobium carbide) were constructed by self-assembly, in-situ chemical deposition and subsequent pyrolysis. The carbon fiber aerogel, as the basic skeleton of sea cucumber, forms lightweight three-dimensional interconnected conductive network, enhances the dielectric loss and extends the multiple reflection and absorption paths of EMW. As the tentacles of sea cucumber surface, Nb2CTx MXene and Co nitrogen-doped carbon nanosheet arrays exist rich heterogeneous interfaces, which play an important role in improving EMW polarization loss and optimizing impedance matching. The minimum reflection loss (RLmin) of Nb2CTx@Co-NC@CFA reaches –54.7 dB at 9.84 GHz (2.36 mm) with a low filling ratio of 10 wt.% and the effective absorption bandwidth (EAB) of Nb2CTx@Co-NC@CFA reaches 2.96 GHz (8.48–11.44 GHz) with 2.36 mm and 5.2 GHz (12.8–18 GHz) with 1.6 mm, covering most of X and Ku bands by adjusting thickness. The radar cross section (RCS) value of Nb2CTx@Co-NC@CFA is 26.64 dB·m2, which is lower than that of the perfect electrical conductor (PEC), indicating that Nb2CTx@Co-NC@CFA can effectively decrease the probability of the target being detected by the radar detector. This work provides ideas for design and development of EMW absorbing materials with high-efficiency EMW absorption in X and Ku bands.}
}