Multi-hole fuzz-ball-shaped NiFe/C/Na2MoO4 composite wave absorbing material and preparation method thereof

A composite wave-absorbing material and composite material technology, which is applied in the field of porous pompom NiFe/C/Na2MoO4 composite wave-absorbing material and its preparation, can solve the problems of insufficient wave-absorbing ability and single shape of wave-absorbing material, and achieve enhanced electromagnetic Attenuation ability, enhanced microwave attenuation ability, good impedance matching effect

Active Publication Date: 2020-04-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of porous fluffy NiFe/C/Na 2 MoO 4 Composite wave-absorbing material and its preparation method, the composite material solves the technical problems of MXene-derived wave-absorbing material with single shape and insuffici

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] Step 1, Preparation of Mo 2 CT x Material

[0027] Measure 20 mL of a 40% HF aqueous solution in a polytetrafluoroethylene reactor, weigh Mo 2 2.0 g of GaC precursor, Mo was prepared at room temperature under the condition of magnetic stirring speed of 100 r / min. 2 The GaC precursor was slowly added to the HF aqueous solution within 1.0 min, the reaction vessel was sealed, and the stirring time continued for 24 h. Deionized water was added to the obtained product and centrifuged at 3500 rpm for 3 min each time. At the last centrifugation, the pH of the supernatant was around 7.0. The obtained product was dried in a vacuum drying oven at 60°C.

[0028] Step 2, Preparation of pom-pom Na 2 MoO 4 Material

[0029] At room temperature, 2 g of sodium hydroxide was weighed and dissolved in 40 mL of deionized water, and 1 mL of 30% v / v hydrogen peroxide was added to make a mixed solution. 2 CT x Weigh 0.1 g and evenly disperse it into the mixed sol...

Example Embodiment

[0035] Example 2

[0036] Step 1, Preparation of Mo 2 CT x Material

[0037] Measure 15 mL of 40% HF aqueous solution in a polytetrafluoroethylene reactor, weigh Mo 2 1.2 g of GaC precursor, Mo was mixed with a magnetic stirring speed of 200 r / min at room temperature. 2 The GaC precursor was slowly added to the HF aqueous solution within 2.0 min, the reaction vessel was sealed, and the stirring time continued for 24 h. Deionized water was added to the obtained product and centrifuged at 3500 rpm for 3 min each time. At the last centrifugation, the pH of the supernatant was around 7.0. The obtained product was dried in a vacuum drying oven at 60°C.

[0038] Step 2, Preparation of pom-pom Na 2 MoO 4 Material

[0039] At room temperature, 2.4 g of sodium hydroxide was weighed and dissolved in 60 mL of deionized water, and 1 mL of 30% v / v hydrogen peroxide was added to make a mixed solution. 2 CT x Weigh 0.15 g and uniformly disperse it into the mixed solution, stir mag...

Example Embodiment

[0045] Example 3

[0046] Step 1, Preparation of Mo 2 CT x Material

[0047] Measure 15 mL of 40% HF aqueous solution in a polytetrafluoroethylene reactor, weigh Mo 2 2.0 g of GaC precursor, Mo was prepared at room temperature under the condition of magnetic stirring speed of 300 r / min. 2 The GaC precursor was slowly added to the HF aqueous solution within 3.0 min, the reaction vessel was sealed, and the stirring time continued for 48 h. Deionized water was added to the obtained product and centrifuged at 3500 rpm for 3 min each time. At the last centrifugation, the pH of the supernatant was around 7.0. The obtained product was dried in a vacuum drying oven at 60°C.

[0048] Step 2, Preparation of pom-pom Na 2 MoO 4 Material

[0049] At room temperature, 2 g of sodium hydroxide was weighed and dissolved in 50 mL of deionized water, and 2 mL of 30% v / v hydrogen peroxide was added to make a mixed solution. 2 CT x Weigh 0.2 g and uniformly disperse it into the mixed so...

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Abstract

The invention discloses a multi-hole fuzz-ball-shaped NiFe/C/Na2MoO4 composite wave absorbing material. The wave absorbing material comprises multi-hole fuzz-ball-shaped Na2MoO4 and NiFe/C nanometer cubes. The NiFe/C nanometer cubes are uniformly distributed on the surface of the multi-hole fuzz-ball-shaped Na2MoO4. According to the method, the fuzz-ball-shaped Na2MoO4 deriving from Mo2CTx is usedas a matrix, the NiFe/C nanometer cubes deriving from NiFe-MOF are used as load layers, the obtained composite material solves the problems that a wave absorbing material deriving from MXene is single in morphology and the wave absorbing ability is insufficient, the good impedance match and the efficient electromagnetism damping ability are obtained, thus the wave absorbing characteristics of thinness, lightness, width, strength and the like within the 2-18 GHz frequency range are achieved, and the material is an ideal selection of a microwave absorbing material.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, in particular to a porous pompom NiFe / C / Na 2 MoO 4 Composite wave-absorbing material and its preparation method. Background technique [0002] With the continuous advancement of electronic information technology, electromagnetic waves have penetrated into various fields. At the same time, electromagnetic radiation has interfered with people's lives and production activities and has seriously affected them. Therefore, the development of efficient electromagnetic absorbing materials is of great significance for both military and civilian applications. Ideal absorbing materials need to have the characteristics of thin, light, wide and strong absorption, and also need to have good environmental stability, multi-band stealth and other advantages to adapt to the development of new absorbing materials. [0003] Metal-organic frameworks (MOFs) materials can obtain metal / porous carbon ...

Claims

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Application Information

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IPC IPC(8): B22F9/20B22F1/02B22F1/00C01G39/00
CPCB22F9/20C01G39/00B22F1/07B22F1/054B22F1/17
Inventor 何曼周钰明王瑞丽许正建彭昊陈曦康逸凡
Owner SOUTHEAST UNIV
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