Multi-phase heterostructures of flower-like Ni(NiO) decorated on two-dimensional Ti3C2Tx/TiO2 for high-performance microwave absorption properties

“…The safety of military and civilian facilities has been threatened by the electromagnetic pollution from electronic devices operating in the GHz frequency range due to the rapid development of wireless communication technologies. − Therefore, in order to eliminate the adverse effects of electromagnetic interference, one of the effective methods is to develop efficient electromagnetic wave (EMW)-absorbing materials, with a thin matching thickness, a light weight, strong absorption capacity, and a broad band. − …”

Section: Introductionmentioning

confidence: 99%

Self-Assembled Co Nanosheet/Ti₃C₂T_x Composites with Tunable Electromagnetic Wave Absorption

Wang

et al. 2023

ACS Appl. Nano Mater.

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Two-dimensional layered Ti 3 C 2 T x is a great potential candidate as an electromagnetic wave (EMW) absorber due to its large specific surface area and abundant functional groups and defects. However, the impedance mismatch caused by the high conductivity and the lack of magnetic loss seriously has limited the application of Ti 3 C 2 T x in EMW absorption. Therefore, Co/ Ti 3 C 2 T x composites were prepared by combining Ti 3 C 2 T x with magnetic Co nanosheets through electrostatic self-assembly. It is found that desired EMW absorption performance could be obtained by optimizing the content of Co nanosheet. Specifically, the optimized sample exhibited a minimum reflection loss (RL min ) value of −47.09 dB and an effective absorption bandwidth of 2.76 GHz as the thickness was 3.67 mm. In addition, possible mechanisms of EMW absorption were elucidated in detail. Our results provide a simple and environmentally friendly method for the design of EMW absorbers based on Ti 3 C 2 T x .

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“…TiO 2 exhibits low permittivity with excellent environmental stability and low toxicity, and it can provide scalable fabrication to synthesize microwave absorption materials. − In addition, TiO 2 is an N-type semiconductor with oxygen defects, which enhance polarization loss. , In the synthesis of MXene-based composites, the surface Ti is easily oxidized to TiO 2 , but many researchers do not pay attention to this phenomenon. − The surface Ti atoms of MXene are thermodynamics-metastable; TiO 2 can be facilely derived from MXenes in situ instead of adding a Ti precursor. − This phenomenon provides a facile strategy to synthesize MXene@TiO 2 composites to get excellent microwave absorption. In situ-derived TiO 2 can be embedded into MXenes to form Schottky contacts, and the built-in electric field in the Schottky barrier is beneficial to promote EMW loss. , MXene is sensitive to heat temperature and time, and controlling the quantity of in situ-derived TiO 2 is the key to obtain excellent microwave absorption.…”

Section: Introductionmentioning

confidence: 99%

TiO₂ Nanosheets/Ti₃C₂T_x MXene 2D/2D Composites for Excellent Microwave Absorption

Sun

Zhao

Zhang

et al. 2023

ACS Appl. Nano Mater.

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Ti 3 C 2 T x MXene is a potential microwave absorption material due to its unique physical and chemical properties. However, the impedance mismatch of MXene results in low microwave absorption. In this work, 2D/2D MXene@TiO 2 composites were synthesized via a simple hydrothermal oxidation method, TiO 2 is derived in situ from MXene without adding any additional Ti precursors. TiO 2 with low permittivity can effectively regulate the impedance matching and enhance loss mechanisms. The MXene@TiO 2 -6 h composite shows a reflection loss (RL) of −58.3 dB at 11.36 GHz with a thickness of 1.75 mm, and the maximum effective absorption bandwidth (EAB) is 4.08 GHz (13.92−18 GHz) at 1.26 mm. Furthermore, the 2D/2D composite can obtain efficient microwave absorption at different frequencies by adjusting the thickness; RL can reach −39.1 dB at 5.04 GHz with a thickness of 3.5 mm. The radar cross section (RCS) of MXene@TiO 2 -6 h is lower than −19 dB m 2 at −60−60°, and the minimum RCS is −56 dB m 2 at 15°. This work provides a valuable experience in developing microwave absorption materials.

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Multi-phase heterostructures of flower-like Ni(NiO) decorated on two-dimensional Ti3C2Tx/TiO2 for high-performance microwave absorption properties

Cited by 31 publications

References 53 publications

Recent progress in energy, environment, and electronic applications of MXene nanomaterials

Recent progress in energy, environment, and electronic applications of MXene nanomaterials

Self-Assembled Co Nanosheet/Ti₃C₂T_x Composites with Tunable Electromagnetic Wave Absorption

TiO₂ Nanosheets/Ti₃C₂T_x MXene 2D/2D Composites for Excellent Microwave Absorption

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Multi-phase heterostructures of flower-like Ni(NiO) decorated on two-dimensional Ti3C2Tx/TiO2 for high-performance microwave absorption properties

Cited by 31 publications

References 53 publications

Recent progress in energy, environment, and electronic applications of MXene nanomaterials

Recent progress in energy, environment, and electronic applications of MXene nanomaterials

Self-Assembled Co Nanosheet/Ti3C2Tx Composites with Tunable Electromagnetic Wave Absorption

TiO2 Nanosheets/Ti3C2Tx MXene 2D/2D Composites for Excellent Microwave Absorption

Contact Info

Product

Resources

About

Self-Assembled Co Nanosheet/Ti₃C₂T_x Composites with Tunable Electromagnetic Wave Absorption

TiO₂ Nanosheets/Ti₃C₂T_x MXene 2D/2D Composites for Excellent Microwave Absorption