Castor-shaped graphite carbon nitride nanotube/cobalt/carbon composite material and preparation method thereof

A technology of graphite carbon nitride and carbon composite materials, applied in the direction of nitrogen compounds, chemical instruments and methods, carbon preparation/purification, etc., can solve the problems of limited application and high density, and achieve thin thickness, wide frequency band, and change absorption effect of ability

Pending Publication Date: 2022-05-24
安徽理工大学环境友好材料与职业健康研究院(芜湖)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of magnetic absorber has good microwave absorption properties, its practical application is limited due to its high density.

Method used

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  • Castor-shaped graphite carbon nitride nanotube/cobalt/carbon composite material and preparation method thereof
  • Castor-shaped graphite carbon nitride nanotube/cobalt/carbon composite material and preparation method thereof
  • Castor-shaped graphite carbon nitride nanotube/cobalt/carbon composite material and preparation method thereof

Examples

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preparation example Construction

[0032] A preparation method of a castor fruit-shaped graphitic carbon nitride nanotube / cobalt / carbon composite material, the preparation method comprises the following steps:

[0033] Step 1: The N,N-dimethylformamide, cobalt salt and trimesic acid are subjected to agitation and ultrasonic treatment, and taken out after the treatment to obtain solution A;

[0034] Step 2: fully stirring absolute ethanol and polyvinylpyrrolidone, fully ultrasonically treating, and taking out after the treatment to obtain solution B.

[0035] Step 3: fully stir the solution B, add the solution A into the solution B for mixing and stirring treatment, and take out after the stirring to obtain the solution C.

[0036] Step 4: Transfer the solution C to a hydrothermal reaction kettle, carry out a solvothermal reaction, and react at 120-200° C. for 10-20 hours. After the reaction is completed, carry out cooling treatment and washing treatment to obtain a bottom precipitate.

[0037] Step 5: The bott...

Embodiment 1

[0044]This example shows the preparation method of a castor fruit-like graphitic carbon nitride nanotube / cobalt / carbon composite material according to the following steps:

[0045] Step 1: 20 mL of N,N-dimethylformamide, 3 mmol of cobalt nitrate and 1 mmol of trimesic acid were stirred for 60 min, ultrasonically treated for 30 min, and taken out after the treatment to obtain solution A.

[0046] Step 2: stir 20 mL of absolute ethanol and 1 g of polyvinylpyrrolidone for 60 min, ultrasonically treat for 30 min, and take out after the treatment to obtain solution B.

[0047] Step 3: fully stirring the solution B, adding the solution A to the solution B for mixing and stirring for 60 min, and taking out after the stirring to obtain the solution C.

[0048] Step 4: Transfer the solution C to a hydrothermal reaction kettle for solvothermal reaction at 120° C. for 10 hours, and after the reaction is completed, perform cooling treatment and washing treatment to obtain bottom sediment....

Embodiment 2

[0053] This example shows the preparation method of a castor fruit-like graphitic carbon nitride nanotube / cobalt / carbon composite material according to the following steps:

[0054] Step 1: Stir 20 mL of N,N-dimethylformamide, 2 mmol of cobalt chloride and 2 mmol of trimesic acid for 60 min, ultrasonically treat for 30 min, and take out after the treatment to obtain solution A.

[0055] Step 2: stir 20 mL of absolute ethanol and 1 g of polyvinylpyrrolidone for 60 min, ultrasonically treat for 30 min, and take out after the treatment to obtain solution B.

[0056] Step 3: fully stirring the solution B, adding the solution A to the solution B for mixing and stirring for 60 min, and taking out after the stirring to obtain the solution C.

[0057] Step 4: Transfer the solution C to a hydrothermal reaction kettle for a solvothermal reaction at 150° C. for 15 hours. After the reaction, cooling and washing are performed to obtain a bottom precipitate.

[0058] Step 5: The bottom pre...

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Abstract

The invention discloses a castor-fruit-shaped graphite carbon nitride nanotube / cobalt / carbon composite material and a preparation method thereof. Cobalt nitrate hexahydrate (cobalt chloride and cobalt sulfate) is used as metal salt, tribenzoic acid and polyvinylpyrrolidone are used as organic ligands, N, N-dimethylformamide is used as an organic solvent, and the cobalt-metal organic framework is obtained through a solvothermal method. And grinding and mixing the cobalt-metal organic framework and melamine, and performing carbonization and pyrolysis to obtain the castor-fruit-shaped graphite carbon nitride nanotube / cobalt / carbon composite material. According to the composite wave-absorbing material, graphite carbon nitride nanotubes are used as fruit thorns, and spherical cobalt / carbon is used as fruit kernels, so that a special castor-fruit-shaped morphology structure is formed; the preparation process is simple, effective and low in cost. The prepared composite wave-absorbing material can meet the requirements of wide absorption bandwidth and high absorption strength under the condition of ultra-thin thickness, and has important application value in the field of microwave absorption.

Description

technical field [0001] The invention belongs to the technical field of microwave absorbing materials, and particularly relates to a castor fruit-shaped graphitic carbon nitride nanotube / cobalt / carbon composite material and a preparation method thereof. Background technique [0002] With the extensive and extensive use of radio frequency equipment, such as radio broadcasting, television, electromagnetic wave instruments, etc., electromagnetic wave interference or radiation pollution has been caused. Electromagnetic wave pollution not only interferes with the normal operation of precision instruments, but also seriously endangers human health. Electromagnetic wave absorbing materials are considered to be effective measures to control electromagnetic wave pollution, and have been rapidly developed and deeply studied in recent years. Traditional magnetic microwave absorbing materials have been extensively studied, and they are mainly based on iron, nickel, cobalt alloys or oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/082C01B32/05B22F1/00B22F1/06C09K3/00H05K9/00B82Y40/00
CPCC01B21/0605C01B32/05C09K3/00H05K9/0081B82Y40/00C01P2004/13C01P2002/72C01P2002/82C01P2004/03C01P2004/04
Inventor 田恐虎黄亚男张超疏瑞文朱金波陈志鸿刘晓薇潘成岭
Owner 安徽理工大学环境友好材料与职业健康研究院(芜湖)
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