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NiCu combined nitrogen porous carbon material and preparation method and application thereof

A porous carbon material, porous carbon technology, applied in chemical instruments and methods, other chemical processes, electrical components, etc., can solve problems such as electromagnetic radiation damage to human health, equipment failures, complex preparation methods, etc. The effect of short synthesis period and simple synthesis method

Active Publication Date: 2020-12-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, things always have two sides. While electromagnetic waves are convenient for us, they also have many shortcomings. The first is the problem of mutual interference. The interference between wireless signals that are close to each other makes the work of the equipment often fall into failure; secondly, electromagnetic radiation brings harm to human health. It has become another major pollution after noise pollution, air pollution, water pollution and solid waste, which has attracted widespread attention from all over the world; coupled with the demand for stealth equipment in the military industry, the development of electromagnetic wave absorbing materials become inevitable
[0004] The inventor's existing porous carbon absorbing material has a complicated preparation method and poor performance in absorbing electromagnetic waves

Method used

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  • NiCu combined nitrogen porous carbon material and preparation method and application thereof
  • NiCu combined nitrogen porous carbon material and preparation method and application thereof
  • NiCu combined nitrogen porous carbon material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] (1) Add 0.4mmol nickel nitrate, 0.4mmol copper nitrate, and 60mmol urea into 800mL water under continuous stirring; then put it into an oil bath, add melamine sponge, and react at 100°C for 10h. After naturally cooling to room temperature, the melamine sponge precursor is obtained; after the product is separated from the solvent, it is washed with ethanol and deionized water for several times and dried.

[0042] (2) The obtained melamine sponge precursor was heated to 900 °C at a heating rate of 5 °C / min under the protection of nitrogen, kept at a constant temperature for 1 h, and then naturally cooled to room temperature to obtain NiCu composite nitrogen-loaded three-dimensional porous carbon.

[0043]The obtained NiCu composite nitrogen-supported three-dimensional porous carbon was mixed with paraffin at 50° C. to obtain a porous carbon absorber. The mass ratio of NiCu composite nitrogen-loaded porous carbon material to paraffin was 2:3.

[0044] figure 1 It is the ...

Embodiment 2

[0051] (1) Add 0.1mmol nickel nitrate, 0.2mmol copper nitrate and 60mmol urea into 1000mL water under continuous stirring; then put it into an oil bath, add melamine sponge, and react at 80°C for 10h. After naturally cooling to room temperature, the melamine sponge precursor is obtained; after the obtained product is separated from the solvent, it is washed with ethanol and deionized water for several times and dried.

[0052] (2) The obtained melamine sponge precursor was heated to 1000 °C at a heating rate of 5 °C / min under the protection of nitrogen, kept at a constant temperature for 1 h, and then naturally cooled to room temperature to obtain NiCu composite nitrogen-loaded three-dimensional porous carbon.

[0053] The obtained NiCu composite nitrogen-supported three-dimensional porous carbon was mixed with paraffin at 50° C. to obtain a porous carbon absorber. The mass ratio of NiCu composite nitrogen-loaded porous carbon material to paraffin was 2:3.

[0054] Figure 6...

Embodiment 3

[0056] (1) Add 0.2mmol of nickel nitrate, 0.1mmol of copper nitrate and 60mmol of urea into 800mL of water under continuous stirring; then put it into an oil bath, add melamine sponge, and react at 110°C for 5h. After naturally cooling to room temperature, the melamine sponge precursor is obtained; after the obtained product is separated from the solvent, it is washed with ethanol and deionized water for several times and dried.

[0057] (2) The obtained melamine sponge precursor was heated to 800 °C at a heating rate of 5 °C / min under the protection of nitrogen, kept at a constant temperature for 1 h, and then naturally cooled to room temperature to obtain NiCu composite nitrogen-loaded three-dimensional porous carbon.

[0058] The obtained NiCu composite nitrogen-supported three-dimensional porous carbon was mixed with paraffin at 50° C. to obtain a porous carbon absorber. The mass ratio of NiCu composite nitrogen-loaded porous carbon material to paraffin was 2:3.

[0059] ...

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Abstract

The invention relates to a NiCu combined nitrogen-loaded porous carbon material as well as a preparation method and application thereof. The NiCu combined nitrogen-loaded porous carbon material is a porous carbon material, and Ni, Cu and nitrogen elements are loaded in the porous carbon material. The NiCu combined nitrogen-loaded porous carbon material is obtained by dipping a melamine sponge witha nickel salt and a copper salt, and then conducting roasting. The porous carbon material obtained by loading the three elements has rich interfaces, interface polarization can be provided, the dielectric loss of the material to electromagnetic waves is increased, and on the other hand, electromagnetic waves can enter the material as much as possible due to appropriate impedance matching of the material. The porous carbon material has good wave-absorbing performance.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave absorbing materials, and in particular relates to a NiCu-nitrogen-combined porous carbon material and a preparation method and application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The discovery of electromagnetic waves has greatly promoted the progress of human technology. Our current living environment is full of various electromagnetic waves, and they play an extremely important role in today's society. Modern technology is developing towards the trend of wireless, and more and more electronic devices have begun to introduce wireless transmission technology, such ...

Claims

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Application Information

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IPC IPC(8): C09K3/00H05K9/00
CPCC09K3/00H05K9/0081
Inventor 刘久荣刘伟吕龙飞吴莉莉汪宙王凤龙
Owner SHANDONG UNIV