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Two-dimensional magnetic Fe3GeTe2 nanosheet and graphene nanosheet composite material as well as preparation method and application thereof

A technology of graphene nanosheets and composite materials, which is applied in the field of wave-absorbing materials, can solve the problems of not being able to meet the reflection loss value, hinder the development of wave-absorbing materials, and low thickness at the same time, and achieve good dispersion effect, low power, and high power. Effect

Active Publication Date: 2021-07-02
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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  • Two-dimensional magnetic Fe3GeTe2 nanosheet and graphene nanosheet composite material as well as preparation method and application thereof
  • Two-dimensional magnetic Fe3GeTe2 nanosheet and graphene nanosheet composite material as well as preparation method and application thereof
  • Two-dimensional magnetic Fe3GeTe2 nanosheet and graphene nanosheet composite material as well as preparation method and application thereof

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Effect test

Embodiment 1

[0042] This embodiment provides a two-dimensional magnetic Fe 3 GeTe 2 Nano sheet and graphene nano sheet composite material, the flow process of its preparation method is as follows figure 1 As shown, it specifically includes the following steps:

[0043] (1) Grinding Fe 3 GeTe 2 single crystal, obtained Fe 3 GeTe 2 Powder; the Fe 3 GeTe 2 The powder was added into acetone (1mg / mL), and the ultrasonic liquid phase exfoliation was performed for 10 hours, and the power of the ultrasonic liquid phase exfoliation was 500W to obtain Fe 3 GeTe 2 nanosheet dispersion.

[0044] (2) Fe was collected by vacuum filtration and washed 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 evenly mixed according to the mass ratio of 1:1~3, and added to NMP (1-methyl-2-pyrrolidone) according to a certain mass ratio (1mg / mL), and ultrasonically dissociated in liquid phase for 2 h...

Embodiment 2

[0051] This embodiment provides a two-dimensional magnetic Fe 3 GeTe 2 Nano sheet and graphene nano sheet composite material, the flow process of its preparation method is as follows figure 1 As shown, it specifically includes the following steps:

[0052] (1) Grinding Fe 3 GeTe 2 single crystal, obtained Fe 3 GeTe 2 Powder; the Fe 3 GeTe 2 The powder was added to acetone (1.5mg / mL), and the ultrasonic liquid phase exfoliation was performed for 15 hours. The power of the ultrasonic liquid phase exfoliation was 600W, and Fe 3 GeTe 2 nanosheet dispersion.

[0053] (2) Fe was collected by vacuum filtration and washed 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 according to the mass ratio of 1:2, and added to NMP (1-methyl-2-pyrrolidone) according to a certain mass-volume ratio (1.5 mg / mL), and ultrasonically dissociated in liquid phase for 4...

Embodiment 3

[0057] This embodiment provides a two-dimensional magnetic Fe 3 GeTe 2 Nano sheet and graphene nano sheet composite material, the flow process of its preparation method is as follows figure 1 As shown, it specifically includes the following steps:

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

[0059] (2) Fe was collected by vacuum filtration and washed 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 according to the mass ratio of 1:2, and added to NMP (1-methyl-2-pyrrolidone) according to a certain mass-volume ratio (0.5 mg / mL), and ultrasonically dissociated in liquid phase for ...

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Abstract

The invention provides a two-dimensional magnetic Fe3GeTe2 nanosheet and graphene nanosheet composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing Fe3GeTe2 powder with acetone, carrying out ultrasonic liquid phase stripping in an ice bath environment for 8-20 hours, and carrying out vacuum filtration and washing to obtain a Fe3GeTe2 nanosheet; and mixing Fe3GeTe2 nanosheets with graphite and 1-methyl-2-pyrrolidone, and carrying out ultrasonic liquid phase dissociation for 1-5 hours in an ice bath environment, so as to obtain the two-dimensional magnetic Fe3GeTe2 nanosheet and graphene nanosheet composite material. When the thickness of the Fe3GeTe2 nanosheet and graphene nanosheet composite material prepared by the method is only 1.45 mm, the maximum reflection loss of the Fe3GeTe2 nanosheet and graphene nanosheet composite material to microwaves with the frequency of 9.9 GHz is 44.43 dB. Therefore, the material has good microwave absorption performance and wide application prospect.

Description

technical field [0001] The invention belongs to the field of wave-absorbing materials, and more specifically relates to a composite material of two-dimensional magnetic Fe3GeTe2 nanosheets and graphene nanosheets and its preparation method and application. Background technique [0002] With the rapid development of electronic technology, electromagnetic waves are closely related to our lives, such as microwave ovens that heat food in a short period of time, the upgrading of mobile communications, and the precise positioning of GPS. However, electromagnetic waves are a "double-edged sword", which brings us convenience but also 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 the protection of human health and the normal operation of electronic ...

Claims

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Application Information

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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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