Zhichao Mu, Lanzhi Wang, Benhui Fan, Zuojuan Du, Jianling Yue, Yu Liu and Xiaozhong Huang
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In situ growth of carbon nanotubes on MXenes for high-performance electromagnetic wave absorption†
Two-dimensional transition metal carbides and nitrides (MXenes), especially titanium carbide, are ideal materials for high-performance microwave absorbers. Nonetheless, their characteristics of being prone to stacking and agglomeration seriously affect their application. Moreover, their elevated electrical conductivity results in the reflection of electromagnetic waves (EMW) rather than their absorption. This study proposes a simple strategy to grow CNTs on the surface of MXenes by chemical vapor deposition (CVD) technology, and introduces a SiO2 intermediate layer to uniformly distribute CNTs on the substrate surface. Controlling the growth of CNTs by adjusting the reaction time to regulate the microstructure and electromagnetic parameters of the composite materials, the wave absorption performance under low filling amount was significantly improved. MXene@SiO2–CNTs exhibit a minimum reflection loss of −48.38 dB at a thickness of 2.1 mm, with an effective absorption bandwidth extending to 5.47 GHz (from 12.53 GHz to 18 GHz). The radar cross-section values of MXene@SiO2–15CNTs are all below −15 dBm2, significantly diminishing the likelihood of radar detection of the target.
期刊介绍:
An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.