Highly Stable 3D Ti3C2Tx MXene-Based Foam Architectures toward High-Performance Terahertz Radiation Shielding.,ACS Nano

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Highly Stable 3D Ti3C2Tx MXene-Based Foam Architectures toward High-Performance Terahertz Radiation Shielding.
ACS Nano ( IF 15.8 ) Pub Date : 2020-01-27 , DOI: 10.1021/acsnano.9b08832
Zehui Lin ₁ , Ji Liu ₁ , Wei Peng ₁ , Yunyi Zhu ₁ , Yang Zhao ₁ , Kang Jiang ₁ , Ming Peng ₁ , Yongwen Tan ₁

Affiliation

Terahertz technology promises broad applications, which calls for terahertz electromagnetic interference (EMI) shielding materials to alleviate radiation pollution. 2D transition metal carbides and/or nitrides (MXenes) with metallic conductivity are promising for EMI shielding, but simultaneously realizing light weight, high stability, and foldability in a MXene shielding material to meet the requirements of increasingly popular portable and wearable equipment has remained a great challenge. Herein, an ion-diffusion-induced gelation method is demonstrated to synthesize free-standing, light-weight, foldable, and highly stable MXene foams, in which MXene sheets are cross-linked by multivalent metal ions and graphene oxide to form an oriented porous structure. The method is highly efficient, controllable, and versatile for scalable generation of functional 3D MXene structures with arbitrary shapes and synergistic properties. The distinctive cross-linked porous structure endows the light-weight MXene foam with good foldability, outstanding durability and stability in wet environments, and an excellent terahertz shielding effectiveness of 51 dB at a small thickness of 85 μm. This work not only provides an insight for the on-target design of high-performance terahertz shielding materials but also expands the applications of MXenes in 3D macroscopic form.

中文翻译：

基于高性能3D Ti3C2Tx MXene的泡沫架构，可实现高性能太赫兹辐射屏蔽。

太赫兹技术有广阔的应用前景，需要太赫兹电磁干扰（EMI）屏蔽材料来减轻辐射污染。具有金属导电性的2D过渡金属碳化物和/或氮化物（MXenes）有望用于EMI屏蔽，但同时实现MXene屏蔽材料的轻质，高稳定性和可折叠性，以满足日益流行的便携式和可穿戴设备的要求。巨大的挑战。本文中，证明了离子扩散诱导的凝胶化方法可合成自立，重量轻，可折叠且高度稳定的MXene泡沫，其中MXene片材通过多价金属离子和氧化石墨烯交联形成定向多孔结构体。该方法高效，可控，多功能，可扩展生成具有任意形状和协同特性的功能性3D MXene结构。独特的交联多孔结构赋予轻质MXene泡沫以良好的可折叠性，在潮湿环境中具有出色的耐久性和稳定性，在85μm的较小厚度下具有51 dB的出色的太赫兹屏蔽效果。这项工作不仅为高性能太赫兹屏蔽材料的目标设计提供了见识，而且还扩展了3D宏观形式的MXene的应用。在厚度仅为85μm的情况下具有51 dB的出色的太赫兹屏蔽效果。这项工作不仅为高性能太赫兹屏蔽材料的目标设计提供了见识，而且还扩展了3D宏观形式的MXene的应用。在厚度仅为85μm的情况下具有51 dB的出色的太赫兹屏蔽效果。这项工作不仅为高性能太赫兹屏蔽材料的目标设计提供了见识，而且还扩展了3D宏观形式的MXene的应用。

更新日期：2020-01-29

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