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
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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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