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Highly graphitized boron-doped carbon nanocapsule and preparation method thereof

A technology of nanocapsules and boron doping, which is applied in the field of nanomaterials, can solve the problems of high cost, and achieve the effects of low cost, important practical value, and simple method operation

Active Publication Date: 2020-06-16
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Highly graphitized boron-doped carbon nanocapsule and preparation method thereof
  • Highly graphitized boron-doped carbon nanocapsule and preparation method thereof
  • Highly graphitized boron-doped carbon nanocapsule and preparation method thereof

Examples

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Effect test

Embodiment 1

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

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

Embodiment 2

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

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

Embodiment 3

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

[0050] Accurately weigh 0.8g of halloysite and 12g of glucose, add alcohol (the mass fraction of alcohol is 99.5%) and 170mL of water with a volume ratio of 1:1, put them into a beaker, ultrasonicate for 40min, and stir on a magnetic stirrer for 2h , and then put it into a 200mL hydrothermal reaction kettle, and heat it at 180°C for 8h. The obtained hydrothermal product was filtered and washed with a water-alcohol mixture with a volume ratio of 5:1, and then dried in a vacuum oven at 60°C for 24 hours. The obtained dry product was placed in 10% HF and H at a volume ratio of 1:1. 2 SO 4 Soak in the mixture for 24 hours, then filter and wash until the filtrate is neutral, and put the obtained product in a vacuum drying oven to dry at 60°C for 24 hours. Then, take 2 g of the dry product, add 8 g of boric acid, mix well, put it into a high-temperature graphitization fu...

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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 of a three-dimensional hollow nanocapsule network structure, the graphitization degree is 89-98%, the conductivity is high, the specific surface area is 200-400m<2> / g, the pore volume is 1-2cm<3> / g, the diameter is 50-75nm, and the boron doping amount is 1-3 at%. The preparation method comprises the following steps: carrying out hydrothermal treatment on natural halloysite powder and a carbohydrate to obtain hydrothermal carbon;and after hydrothermal carbon is soaked in a mixed acid solution to etch a template, carrying out high-temperature graphitization treatment under the protection of an external boron source and protective gas to finally obtain the highly-graphitized boron-doped carbon nanocapsule material. The carbon nanocapsule material with a three-dimensional network structure prepared by the method has the advantages of high graphitization degree, 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. It 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 materials can be adjusted by changing the carbon source and preparation conditions. The sources of raw materials for graphitization mainly include anthracite, pitch, needle coke, etc. The graphitization process is the transformation from disordered stray structure to ordered graphitization structure. The ideal graphite crystal has a layered structure, and the plan...

Claims

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Application Information

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Patent Type & Authority Applications(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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