2D magnetic fe 3 gete 2 Nanosheet and graphene nanosheet composite material and preparation method and application thereof

A technology of graphene nanosheets and composite materials, applied in the field of wave absorbing materials, can solve the problems of low thickness, unable to meet the reflection loss value at the same time, hinder the development of wave absorbing materials, etc., and achieve high power, good dispersion effect, high power Effect

Active Publication Date: 2022-07-01
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The above-mentioned literatures have prepared some composite materials with absorbing properties, but they all have certain defects to varying degrees, for example: they cannot meet the requirements of low reflection loss and thin thickness at the same time.
And these problems are precisely the main obstacles hindering the development of wave-absorbing materials. In view of this, this application proposes a new composite material to solve the above problems

Method used

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  • 2D magnetic fe <sub>3</sub> gete <sub>2</sub> Nanosheet and graphene nanosheet composite material and preparation method and application thereof
  • 2D magnetic fe <sub>3</sub> gete <sub>2</sub> Nanosheet and graphene nanosheet composite material and preparation method and application thereof
  • 2D magnetic fe <sub>3</sub> gete <sub>2</sub> Nanosheet and graphene nanosheet composite material and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0042] This embodiment provides a two-dimensional magnetic Fe 3 GeTe 2 Nanosheet and graphene nanosheet composite material, the process of its preparation method is as follows figure 1 It includes the following steps:

[0043] (1) Grinding Fe 3 GeTe 2 Single crystal, to obtain Fe 3 GeTe 2 powder; Fe 3 GeTe 2 The powder was added to acetone (1mg / mL), and the ultrasonic liquid phase exfoliation was carried out for 10 hours. The power of ultrasonic liquid phase exfoliation was 500W to obtain Fe. 3 GeTe 2 Nanosheet dispersion.

[0044] (2) Collect Fe by vacuum filtration and washing with deionized water 3 GeTe 2 Nanosheets, dried under vacuum to obtain Fe 3 GeTe 2 Nanosheets.

[0045] (3) Graphite and Fe 3 GeTe 2 The nanosheets were uniformly mixed in a mass ratio of 1:1 to 3, added to NMP (1-methyl-2-pyrrolidone) in a certain mass ratio (1 mg / mL), and dissociated by ultrasonic liquid phase for 2 hours, thereby obtaining Fe 3 GeTe 2 The nanosheets and graphene na...

Embodiment 2

[0051] This embodiment provides a two-dimensional magnetic Fe 3 GeTe 2 Nanosheet and graphene nanosheet composite material, the process of its preparation method is as follows figure 1 It includes the following steps:

[0052] (1) Grinding Fe 3 GeTe 2 Single crystal, to obtain Fe 3 GeTe 2 powder; Fe 3 GeTe 2 The powder was added to acetone (1.5mg / mL), and the ultrasonic liquid phase exfoliation was carried out for 15 hours. The power of ultrasonic liquid phase exfoliation was 600W to obtain Fe. 3 GeTe 2 Nanosheet dispersion.

[0053] (2) Collect Fe by vacuum filtration and washing with deionized water 3 GeTe 2 Nanosheets, dried under vacuum to obtain Fe 3 GeTe 2 Nanosheets;

[0054] (3) Graphite and Fe 3 GeTe 2 The nanosheets were uniformly mixed at a mass ratio of 1:2, added to NMP (1-methyl-2-pyrrolidone) at a certain mass-to-volume ratio (1.5 mg / mL), and dissociated by ultrasonic liquid phase for 4 hours, thereby obtaining Fe 3 GeTe 2 Nanosheets and graphe...

Embodiment 3

[0057] This embodiment provides a two-dimensional magnetic Fe 3 GeTe 2 Nanosheet and graphene nanosheet composite material, the process of its preparation method is as follows figure 1 It includes the following steps:

[0058] (1) Grinding Fe 3 GeTe 2 Single crystal, to obtain Fe 3 GeTe 2 powder; Fe 3 GeTe 2 The powder was added to acetone (0.5mg / mL), and the ultrasonic liquid phase peeling was carried out for 9 hours. The power of ultrasonic liquid phase peeling was 400W, and Fe was obtained. 3 GeTe 2 Nanosheet dispersion.

[0059] (2) Collect Fe by vacuum filtration and washing with deionized water 3 GeTe 2 Nanosheets, dried under vacuum to obtain Fe 3 GeTe 2 Nanosheets;

[0060] (3) Graphite and Fe 3 GeTe 2 The nanosheets were uniformly mixed at a mass ratio of 1:2, added to NMP (1-methyl-2-pyrrolidone) at a certain mass-to-volume ratio (0.5 mg / mL), and dissociated by ultrasonic liquid phase for 1 hour, thereby obtaining Fe 3 GeTe 2 Nanosheets and graphene...

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Abstract

The present invention provides a two-dimensional magnetic Fe 3 GeTe 2 Nanosheet and graphene nanosheet composite material and preparation method and application thereof. The preparation method includes: 3 GeTe 2 The powder is mixed with acetone, and the ultrasonic liquid phase is peeled off in an ice bath environment for 8 to 20 hours. After vacuum filtration and washing, Fe is obtained. 3 GeTe 2 nanosheets; Fe 3 GeTe 2 The nanosheets are mixed with graphite and 1-methyl-2-pyrrolidone, and ultrasonic liquid phase dissociation is carried out in an ice bath environment for 1 to 5 hours to obtain two-dimensional magnetic Fe 3 GeTe 2 Nanosheets and graphene nanosheet composites. Fe prepared by this method 3 GeTe 2 The composite material of nanosheets and graphene nanosheets has a maximum reflection loss of 44.43dB for microwaves with a frequency of 9.9GHz when the thickness is only 1.45mm. This shows that it has good microwave absorption performance and has broad application prospects.

Description

technical field [0001] The invention belongs to the field of wave absorbing materials, and more particularly, relates to a two-dimensional magnetic Fe3GeTe2 nanosheet and graphene nanosheet composite material and a preparation method and application thereof. Background technique [0002] With the rapid development of electronic technology, electromagnetic waves are closely related to our lives, such as microwave ovens for heating food in a short time, the replacement of mobile communications, and the precise positioning of GPS. However, electromagnetic waves are a "double-edged sword", which not only brings us convenience, but also brings serious electromagnetic pollution and interference. It has a serious impact on the physical and mental health of the human body and the operation of electronic equipment. Microwave absorbing materials can effectively absorb these harmful electromagnetic waves, which is beneficial to protect human health and the normal operation of electron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00C01B19/00C01B32/19C01B32/194B82Y40/00B82Y30/00
CPCH05K9/0081C01B19/002C01B32/19C01B32/194B82Y30/00B82Y40/00C01P2002/72C01P2002/82C01P2006/42
Inventor 牟从普季颖温福昇王博翀向建勇柳忠元
Owner YANSHAN UNIV
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