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A highly graphitized boron-doped carbon nanocapsule and its preparation method

A technology of nanocapsules and high-temperature graphitization, which is applied in the field of nanomaterials, can solve expensive problems, achieve low cost, promote vigorous development, and have important practical value

Active Publication Date: 2022-05-27
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods generally require expensive special equipment and a large amount of energy input, which often brings some technical problems of one kind or another to the experiment.

Method used

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  • A highly graphitized boron-doped carbon nanocapsule and its preparation method
  • A highly graphitized boron-doped carbon nanocapsule and its preparation method
  • A highly graphitized boron-doped carbon nanocapsule and its preparation method

Examples

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Embodiment 1

[0037] A preparation method of highly graphitized boron-doped carbon nanocapsules, the steps are as follows:

[0038] Accurately weigh 0.8 g of halloysite and 8 g of glucose, add alcohol (the mass fraction of alcohol is 99.5%) and 160 mL of water in a volume ratio of 1:1, put it into a beaker and sonicate for 30 minutes, then stir on a magnetic stirrer for 2 hours , and then put it into a 200 mL hydrothermal reactor, and hydrothermally heated it for 8 hours at 180 °C. The obtained hydrothermal product was filtered and washed with a mixture of water and alcohol with a volume ratio of 5:1, and then was placed in a vacuum drying oven for drying at 50° C. for 24 hours. The obtained dried product was placed in a 1:1 volume ratio of 15% HF and H 2 SO 4 Soak in the mixture for 24 hours, then filter and wash until the filtrate is neutral, and put the obtained product into a vacuum drying box to dry at 60°C for 24 hours. Then, take 2 g of the dried product, add 4.143 g of boric acid...

Embodiment 2

[0046] A preparation method of highly graphitized boron-doped carbon nanocapsules, the steps are as follows:

[0047] Accurately weigh 0.8 g of halloysite and 8 g of glucose, add alcohol (the mass fraction of alcohol is 99.5%) and 160 mL of water in a volume ratio of 1:1, put them in a beaker and sonicate for 20 minutes, and then stir on a magnetic stirrer for 1 hour. , and then put it into a 200mL hydrothermal reactor, and hydrothermally heated it for 6h at 160°C. The obtained hydrothermal product was filtered and washed with a mixture of water and alcohol with a volume ratio of 5:1, and then was placed in a vacuum drying oven for drying at 50° C. for 24 hours. The obtained dried product was placed in a 1:1 volume ratio of 25% HF and H 2 SO 4 Soak in the mixture for 12h, then filter and wash until the filtrate is neutral, and put the obtained product into a vacuum drying box to dry at 50°C for 24h. Then, take 2 g of the dried product, add 2 g of boric acid, mix it evenly, ...

Embodiment 3

[0049] A preparation method of highly graphitized boron-doped carbon nanocapsules, the steps are as follows:

[0050] Accurately weigh 0.8 g of halloysite and 12 g of glucose, add alcohol (the mass fraction of alcohol is 99.5%) and 170 mL of water in a volume ratio of 1:1, put them in a beaker and sonicate for 40 minutes, and then stir on a magnetic stirrer for 2 hours , and then put it into a 200 mL hydrothermal reactor, and hydrothermally heated it for 8 hours at 180 °C. The obtained hydrothermal product was filtered and washed with a mixture of water and alcohol with a volume ratio of 5:1, and then was placed in a vacuum drying oven for drying at 60° C. for 24 hours. The obtained dried product was placed in a volume ratio of 1:1 with 10% HF and H 2 SO 4 Soak in the mixture for 24 hours, then filter and wash until the filtrate is neutral, and put the obtained product into a vacuum drying box to dry at 60°C for 24 hours. Then, take 2 g of the dried product, add 8 g of bori...

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Abstract

The invention discloses a highly graphitized boron-doped carbon nanocapsule and a preparation method thereof. The highly graphitized boron-doped carbon nanocapsule is a three-dimensional hollow nanocapsule network structure, and the degree of graphitization is 89-98%. High conductivity, specific surface area of ​​200‑400m 2 / g, the pore volume is 1‑2cm 3 / g, the diameter is 50-75nm, and the boron doping amount is 1-3at%. The preparation method is as follows: hydrothermal treatment of natural halloysite powder and carbohydrate compounds to obtain hydrothermal carbon; hydrothermal carbon is soaked in a mixed acid solution to etch the template, and then subjected to high-temperature graphitization treatment under the protection of an external boron source and protective gas. Finally, a highly graphitized boron-doped carbon nanocapsule material is obtained. The carbon nanocapsule material with a three-dimensional network structure prepared by the method has the advantages of high degree of graphitization, few defects, good adsorption performance, controllable specific surface area and pore volume, and adjustable boron content.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a highly graphitized boron-doped carbon nanocapsule and a preparation method thereof. Background technique [0002] Graphitized carbon materials have received extensive attention in recent years due to their excellent electrical and thermal conductivity, thermal stability, chemical stability, and mechanical properties. Has great application value. And if the material has an ideal graphite layered structure, its physical and chemical properties can be further improved. [0003] The degree of graphitization of the material can be regulated by changing the carbon source and preparation conditions. The raw material sources of graphitization mainly include anthracite, pitch, needle coke, etc. The graphitization process is the transformation from disordered disordered layer structure to ordered graphitized structure. The ideal graphite crystal has a layered structure, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15C01B32/205B01J13/02
CPCC01B32/15C01B32/205B01J13/02
Inventor 陈锋马路路任建刚朱颖宋志敏李冰刘帅霞张继伟赵一静
Owner HENAN INST OF ENG
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