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Preparation method of vanadium diselenide/CNTs composite material with full-band and multi-band electromagnetic wave absorption performance

A composite material, a technology of absorption performance, applied in chemical instruments and methods, electrical components, other chemical processes, etc., to achieve the effect of increasing dipole polarization loss, high environmental stability, and improving heterogeneous interface loss

Pending Publication Date: 2022-06-17
HARBIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to solve the existing pure VSe 2 Due to the limitation of impedance matching, its development in the field of electromagnetic wave absorption is limited, and a preparation method of vanadium diselenide / CNTs composite material with full-band and multi-band electromagnetic wave absorption properties is provided

Method used

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  • Preparation method of vanadium diselenide/CNTs composite material with full-band and multi-band electromagnetic wave absorption performance
  • Preparation method of vanadium diselenide/CNTs composite material with full-band and multi-band electromagnetic wave absorption performance
  • Preparation method of vanadium diselenide/CNTs composite material with full-band and multi-band electromagnetic wave absorption performance

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specific Embodiment approach 1

[0023] Embodiment 1: A preparation method of vanadium diselenide / CNTs composite material with full-band and multi-band electromagnetic wave absorption performance in this embodiment is completed according to the following steps:

[0024] 1. Prepare the reaction solution:

[0025] will NH 4 VO 3 and C 2 H 2 O 4 ·2H 2 O was added to deionized water, stirred, and then Se was added, and the solution was continuously stirred until the solution became gray-black, then carbon nanotubes were added, and ultrasonication was performed to obtain a black suspension, which was the reaction solution;

[0026] Second, the hydrothermal reaction:

[0027] The reaction solution is transferred to a Teflon autoclave, and then fully hydrothermally reacted under high temperature and high pressure to obtain a reaction product; the obtained reaction product is centrifuged to obtain a solid substance, which is washed and dried to obtain a full-band and multi-band Electromagnetic wave absorption ...

specific Embodiment approach 2

[0028] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the NH 4 VO 3 and C 2 H 2 O 4 ·2H 2 O was added to deionized water, stirred for 10-15 min, and then Se was added.

[0029] Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the NH described in step 1 4 VO 3 , C 2 H 2 O 4 ·2H 2 The molar ratio of O and Se was 1:9.5:2. Other steps are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of a vanadium diselenide composite material, in particular to a preparation method of a vanadium diselenide / CNTs composite material with full-band and multi-band electromagnetic wave absorption performance. The invention aims to solve the problem that the existing pure VSe2 is limited by impedance matching and the development of the VSe2 in the field of electromagnetic wave absorption is limited. The method comprises: 1, preparing a reaction liquid; and 2, hydrothermal reaction. The invention provides the preparation method of the VSe2 / CNTs composite material with full-band and multi-band electromagnetic wave absorption, the prepared VSe2 / CNTs composite material realizes full-band electromagnetic wave absorption of the same sample under different thicknesses and dual-band electromagnetic wave absorption under the same condition, and the minimum reflection loss is-57.53 dB; and the material shows efficient electromagnetic wave absorption performance in a low-frequency band. The vanadium diselenide / CNTs composite material with full-band and multi-band electromagnetic wave absorption performance can be obtained.

Description

technical field [0001] The invention relates to a preparation method of a vanadium diselenide composite material. Background technique [0002] At present, the wide application of electronic equipment, industrial equipment and satellite communication has made electromagnetic radiation and electromagnetic pollution increasingly serious, which not only endangers human health, but also interferes with the normal operation of digital equipment. Therefore, in order to effectively prevent and manage electromagnetic radiation, the preparation of efficient electromagnetic wave absorbing materials has received extensive attention. [0003] Vanadium diselenide (VSe 2 ), as a typical two-dimensional semiconductor material, has the advantages of high electrical conductivity, high carrier concentration, room temperature ferromagnetism, etc. These excellent properties make VSe 2 It has been widely used in the fields of sodium ion storage, hydrogen evolution reaction and electrode materi...

Claims

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Application Information

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IPC IPC(8): C09K3/00H05K9/00
CPCC09K3/00H05K9/0081
Inventor 李林马萌
Owner HARBIN NORMAL UNIVERSITY
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