A morphology-controllable Ti3C2T x MXene / Co / C composite materials, preparation methods and applications

The morphologically controllable Ti3C2Tx MXene/Co/C composite material was prepared by hydrothermal-carbonization method, which solved the problem of insufficient electromagnetic wave absorption performance of existing absorbing materials, and achieved efficient electromagnetic wave absorption performance, especially in terms of impedance matching and absorption layer thickness.

CN118989344BActive Publication Date: 2025-03-21LANZHOU UNIVERSITY OF TECHNOLOGY
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Patent Information

Application Number
CN202411078569.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-08-07
Publication Date
2025-03-21
Estimated Expiration
2044-08-07

AI Technical Summary

Technical Problem

The existing wave absorbing materials have shortcomings in electromagnetic wave absorption performance, especially the MXene material is not excellent enough to be used alone, and the magnetic particle material has a large density and poor stability.

Method used

The Ti3C2Tx MXene/Co/C composite material with controllable morphology was prepared by a combination of hydrothermal and carbonization. By adjusting the pH value of the solution and the hydrothermal reaction conditions, a single Co magnetic nanomaterial of different dimensions was synthesized to improve the dielectric loss and magnetic loss performance of the material.

Benefits of technology

The composite material has achieved efficient electromagnetic wave absorption, the minimum reflection loss value reaches -21.97dB, and the absorption layer thickness reaches 1.5mm, which significantly improves the impedance matching and electromagnetic wave absorption performance of the material.

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Abstract

The invention discloses a morphology-controllable Ti3C2T x MXene / Co / C composite material, preparation method and application thereof, the present invention prepares Ti3C2T by hydrothermal carbonization method x MXene / Co / C absorbing material. Different amounts of NH3·H2O are added to the precursor mixed solution to adjust the pH of the solution, change the surface energy of different crystal faces, change the growth mode of the crystal to a certain extent, and calcine to synthesize single-substance Co magnetic nanomaterials of different dimensions. The present invention breaks the limitations of traditional preparation methods. In the prepared absorbing material, the dosage of NH3·H2O in the precursor mixed solution can adjust the reaction speed of the pH value of the reaction system, thereby changing the growth rate of different crystal faces, and finally synthesizing single-substance Co particles of different morphologies. Among them, the block structure, the cut-angle columnar structure, and the nanorod structure have a larger surface area, which increases the reflection and scattering of the incident electromagnetic wave, effectively prolongs the propagation path of the electromagnetic wave, and brings more interface charge polarization, thereby improving the loss performance of the electromagnetic wave.
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