Microwave absorption parameters over 2–18 GHz frequency range for the MXene composite – Ti3C2Tx @MnCo2O4

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Bulletin Pub Date : 2024-08-20 DOI:10.1016/j.materresbull.2024.113055

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Abstract

The great potential for electromagnetic wave (EMW) absorption is revealed in two-dimensional (2D) Ti₃C₂T_x (MXene) thin sheets that have numerous surface flaws and an extensive spectrum of functional groups. In this study, Ti₃AlC₂ (MAX Phase) is etched, and then ultrasonic exfoliation is used to create 2D ultrathin Ti₃C₂T_x nanosheets; a type of MXene. The MnCo₂O₄ spherical particles were grown on the layered structure of Ti₃C₂T_x via a one-pot hydrothermal process. The synthesized Ti₃C₂T_x/MnCo₂O₄ composite provides superior bulk-to-surface and interfacial charge transfer capabilities due to their short charge transfer distance and extensive interface contact area to the EMW. This article thoroughly evaluates the loss impact in Ti₃C₂T_x/MnCo₂O₄ absorbers as -44.4 dB of reflection loss at 16.04 GHz with a thickness of 5.114 mm for the first time, which is essential for fabricating an effective microwave absorber.

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MXene 复合材料 - Ti3C2Tx @MnCo2O4 在 2-18 GHz 频率范围内的微波吸收参数

二维（2D）Ti3C2Tx（MXene）薄片具有众多表面缺陷和广泛的官能团谱，揭示了其吸收电磁波（EMW）的巨大潜力。在这项研究中，先对 Ti3AlC2（MAX 相）进行蚀刻，然后使用超声波剥离法生成二维超薄 Ti3C2Tx 纳米薄片（MXene 的一种）。通过一锅水热法在 Ti3C2Tx 的层状结构上生长出 MnCo2O4 球形颗粒。合成的 Ti3C2Tx/MnCo2O4 复合材料由于电荷转移距离短、与电磁波的界面接触面积大，因此具有优异的体表电荷转移和界面电荷转移能力。本文首次全面评估了 Ti3C2Tx/MnCo2O4 吸收体的损耗影响，在 16.04 GHz 频率下，厚度为 5.114 mm 的反射损耗为 -44.4 dB，这对于制造有效的微波吸收体至关重要。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.