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Boron/nitrogen double-doped carbon nanotube-carbon nanosheet composite material and preparation method

A carbon nanotube and carbon nanosheet technology, applied in the field of absorbing materials, can solve problems such as electromagnetic wave pollution, and achieve the effects of increasing loss probability, mild experimental process, and excellent electromagnetic absorbing performance.

Active Publication Date: 2022-04-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of this paper is to provide a kind of absorbing material to solve the current electromagnetic wave pollution problem

Method used

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  • Boron/nitrogen double-doped carbon nanotube-carbon nanosheet composite material and preparation method
  • Boron/nitrogen double-doped carbon nanotube-carbon nanosheet composite material and preparation method
  • Boron/nitrogen double-doped carbon nanotube-carbon nanosheet composite material and preparation method

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Embodiment 1

[0031] The preparation method of the boron / nitrogen double-doped carbon nanotube-carbon nanosheet composite material assisted by the molten salt method of the present invention comprises the following steps:

[0032] Step 1: Dissolve 4.75g nickel chloride hexahydrate in 40ml water and stir well.

[0033] Step 2: Dissolve 1.52g of sodium borohydride and 0.16g of sodium hydroxide in 40ml of water and mix well. Slowly and uniformly drop the prepared solution into the prepared solution in step 1 to obtain a black nickel boride precipitate.

[0034] Step 3: wash the nickel boride precipitate obtained in step 2 with ethanol and water, filter, and dry in an oven at 80°C.

[0035] Step 4: Mix 0.128g of the clean nickel boride obtained in step 3 with 1.682g of dicyandiamide and grind them evenly.

[0036]Step 5: Mix and grind the mixture obtained in step 4 with 45.25g of sodium chloride evenly, then transfer it into a porcelain boat, calcining and heat treatment under inert gas, the ...

Embodiment 2

[0039] The preparation method of the boron / nitrogen double-doped carbon nanotube-carbon nanosheet composite material assisted by the molten salt method of the present invention comprises the following steps:

[0040] Step 1: Dissolve 4.75g nickel chloride hexahydrate in 40m1 water and stir evenly.

[0041] Step 2: Dissolve 1.52g of sodium borohydride and 0.16g of sodium hydroxide in 40ml of water and mix well. Slowly and uniformly drop the prepared solution into the prepared solution in step 1 to obtain a black nickel boride precipitate.

[0042] Step 3: wash the nickel boride precipitate obtained in step 2 with ethanol and water, filter, and dry in an oven at 80°C.

[0043] Step 4: Mix 0.128g of the clean nickel boride obtained in step 3 with 1.682g of dicyandiamide and grind them evenly.

[0044] Step 5: Mix and grind the mixture obtained in step 4 with 45.25g of sodium chloride evenly, then transfer it into a porcelain boat, calcining and heat treatment under inert gas, t...

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Abstract

The invention discloses a boron / nitrogen double-doped carbon nanotube-carbon nanosheet composite material and a preparation method thereof. The composite material is composed of ultra-thin carbon nanosheets and bamboo-shaped carbon nanotubes. The carbon nanotubes The interior is wrapped with metallic nickel nanoparticles. The method includes: preparing nickel boride through a mild chemical reduction method. Mix nickel boride, dicyandiamide and sodium chloride in proportion and grind them evenly. The mixture is calcined at a high temperature under an inert atmosphere to obtain a black powder material. The method of the invention has simple process and strong repeatability, and the boron / nitrogen double-doped carbon nanotube-carbon nanosheet composite material obtained by one-step cracking has the characteristics of light weight, low density, excellent electromagnetic wave absorption performance, etc. Both have excellent absorption strength and absorption bandwidth.

Description

technical field [0001] The invention relates to a boron / nitrogen double-doped carbon nanotube-carbon nanosheet composite material, a preparation method and an application thereof, and belongs to the technical field of wave-absorbing materials. [0002] technical background [0003] With the development of radio technology and information industry, electronic products have been widely used, which has brought a series of electromagnetic radiation problems, which have brought many impacts on people's production and life. In addition, with the changes in the international strategic environment, stealth technology has become an important manifestation of the military power competition of various countries. Generally speaking, researchers achieve fighter stealth by designing specific fuselage shapes and aerodynamic layouts, and cooperating with stealth materials. Therefore, it is of great significance to seek effective technologies to reduce or eliminate electromagnetic radiation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/00H05K9/00C01B32/15C01B32/16C01B32/168
CPCC09K3/00H05K9/0081C01B32/16C01B32/168C01B32/15
Inventor 薛卫东卢正王帅赵睿
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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