Flexible and Waterproof 2D/1D/0D Construction of MXene-Based Nanocomposites for Electromagnetic Wave Absorption, EMI Shielding, and Photothermal Conversion

• DOI: 10.1007/s40820-021-00673-9
• Publication Date: 2021-06-25T14:02:46Z
• Authors: Zhen Xiang; Yuyang Shi; Xiaojie Zhu; Lei Cai; Wei Lu
• Keywords: Technology; CNTs; T; Low-dimensional materials; 01 natural sciences; 7. Clean energy; Article; 0104 chemical sciences; Ti3C2Tx; Co; EMI shielding; Electromagnetic wave absorption

ABSTRACT: High-performance electromagnetic wave absorption and electromagnetic interference (EMI) shielding materials with multifunctional characters have attracted extensive scientific and technological interest, but they remain a huge challenge. Here, we reported an electrostatic assembly approach for fabricating 2D/1D/0D construction of Ti(3)C(2)T(x)/carbon nanotubes/Co nanoparticles (Ti(3)C(2)T(x)/CNTs/Co) nanocomposites with an excellent electromagnetic wave absorption, EMI shielding efficiency, flexibility, hydrophobicity, and photothermal conversion performance. As expected, a strong reflection loss of -85.8 dB and an ultrathin thickness of 1.4 mm were achieved. Meanwhile, the high EMI shielding efficiency reached 110.1 dB. The excellent electromagnetic wave absorption and shielding performances were originated from the charge carriers, electric/magnetic dipole polarization, interfacial polarization, natural resonance, and multiple internal reflections. Moreover, a thin layer of polydimethylsiloxane rendered the hydrophilic hierarchical Ti(3)C(2)T(x)/CNTs/Co hydrophobic, which can prevent the degradation/oxidation of the MXene in high humidity condition. Interestingly, the Ti(3)C(2)T(x)/CNTs/Co film exhibited a remarkable photothermal conversion performance with high thermal cycle stability and tenability. Thus, the multifunctional Ti(3)C(2)T(x)/CNTs/Co nanocomposites possessing a unique blend of outstanding electromagnetic wave absorption and EMI shielding, light-driven heating performance, and flexible water-resistant features were highly promising for the next-generation intelligent electromagnetic attenuation system. [Image: see text] HIGHLIGHTS: The 2D/1D/0D Ti(3)C(2)T(x)/carbon nanotubes/Co nanocomposite is successfully synthesized via an electrostatic assembly. Nanocomposites exhibit an excellent electromagnetic wave absorption and a remarkable electromagnetic interference shielding efficiency. The flexible, waterproof, and photothermal conversion performances are achieved. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s40820-021-00673-9.