Preparation method of boron-nitrogen-co-doped carbon dots

A technology of carbon quantum dots and co-doping, applied in chemical instruments and methods, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problem of product photocatalytic hydrogen production performance that has not been reported and production yield Without high-level problems, it can achieve the effect of easy industrial production, uniform size, easy batch and large-scale production

Inactive Publication Date: 2016-02-17
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(SadhanalaH.K., NandaK.K., Boronandnitrogenco-dopedcarbonnanoparticlesasphotoluminescentprobesforselectiveandsensitivedetectionofpicricacid, J.Phys.Chem.C, 2015, 119, 13138~13143.) Although the above two research groups have prepared co-doped carbon nanomaterials except boron and nitrogen particles or carbon quantum dots, but there is no research report on the photocatalytic hydrogen production performance of this product
In addition, the raw materials used in the above preparation process are all chemicals, and the production yield is not high

Method used

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  • Preparation method of boron-nitrogen-co-doped carbon dots

Examples

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Effect test

Embodiment 1

[0031] Take the corncobs and bake them in an oven at 60°C for 24 hours. The brittle corncobs are put into a quartz tube furnace and calcined at a high temperature under the protection of an argon atmosphere. (Parameters: heat up to 1000°C at 5°C / min, keep at 1000°C for 4 hours and then cool naturally.)

[0032] Put corncobs and alcohol into an agate grinding jar with agate balls, and then put them into a planetary ball mill to grind for 2h. Take out the ground abrasive and pour it into a glass beaker together with alcohol. Carry out water removal treatment on the product: bake at 60°C for 12 hours.

[0033] Take 1g of the above-mentioned dried carbon powder and 0.3g of boric acid and dissolve them in 100ml of ultrapure water. After stirring with a magnetic stirrer for 3 hours, the water was evaporated to dryness using a rotary evaporator. The surface of the obtained toner was slightly whitish. Finally, these powders are placed in a porcelain boat of alumina and sent to a ...

Embodiment 2

[0037] Take the corncobs and bake them in an oven at 80°C for 12 hours. The brittle corncobs are put into a quartz tube furnace and calcined at a high temperature under the protection of an argon atmosphere. (Parameters: 10°C / min to heat up to 1100°C, and keep at 1100°C for 5 hours and then cool naturally.)

[0038] Put corncobs and alcohol into an agate grinding jar with agate balls, then put them into a planetary ball mill and grind for 4h. Take out the ground abrasive and pour it into a glass beaker together with alcohol. Carry out water removal treatment on the product: bake at 60°C for 12 hours.

[0039] Take 1g of the above-mentioned dried carbon powder and 0.2g of boric acid and dissolve them in 100ml of ultrapure water. After stirring with a magnetic stirrer for 3 hours, the water was evaporated to dryness using a rotary evaporator. The surface of the obtained toner was slightly whitish. Finally, these powders are placed in a porcelain boat of alumina and sent to ...

Embodiment 3

[0043] Take the corncobs and bake them in an oven at 100°C for 10 hours. The brittle corncobs are put into a quartz tube furnace and calcined at a high temperature under the protection of an argon atmosphere. (Parameters: 8°C / min to heat up to 1800°C, and keep at 1800°C for 2 hours and then cool naturally.)

[0044] Put corncobs and alcohol into an agate grinding jar with agate balls, and then put them into a planetary ball mill for 2.5 hours. Take out the ground abrasive and pour it into a glass beaker together with alcohol. Carry out water removal treatment on the product: bake at 80°C for 12 hours.

[0045] Take 1g of the above-mentioned dried carbon powder and 0.1g of boric acid and dissolve them in 100ml of ultrapure water. After stirring with a magnetic stirrer for 3 hours, the water was evaporated to dryness using a rotary evaporator. The surface of the obtained toner was slightly whitish. Finally, these powders are placed in a porcelain boat of alumina and sent to...

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Abstract

The invention relates to a preparation method of boron-nitrogen-co-doped carbon dots. The method includes the steps of drying corn cobs without corn kernels, putting the corn cobs on a ceramic tray, sending the tray into a tubular furnace to be sintered under the protection of inertia gas, grinding the product into a grinding material, and baking the grinding material to obtain carbon powder; secondly, mixing, stirring and drying carbon powder, boric acid and ultrapure water, putting the product into a quartz tubular furnace with ammonia gas to be sintered, taking out powder to be acidized by mixed liquid of concentrated sulfuric acid and concentrated nitric acid, then stopping the reaction through ultrapure water, conducting repeated centrifuging and ultrasonic processing, and finally conducting vacuum freezing and drying to obtain the boron-nitrogen-co-doped carbon dots. The applied raw material is a sustainable recyclable material, namely, corn cobs, and has the advantages of being easily produced in batches on a large scale; the prepared boron-nitrogen-co-doped carbon dots are uniform in particle size; nitrogen can be prepared by decomposing water through sunlight without sacrificial agent.

Description

technical field [0001] The invention belongs to the field of carbon quantum dots, in particular to a method for preparing boron and nitrogen co-doped carbon quantum dots. Background technique [0002] Since carbon quantum dots and carbon nanoparticle luminescent materials were first discovered, scientists have tried to use a variety of raw materials for preparation. Peng et al. used strong acid to oxidize carbon fibers to prepare carbon quantum dots. The study found that by adjusting the oxidation temperature, carbon quantum dots that exhibit green and blue colors under 365nm fluorescent light can be prepared. (Peng J., Gao W., Gupta B.K., et al. Graphene quantum dots derived from carbon fibers, NanoLett. 2012, 12, 844-849.) Ye et al. prepared carbon quantum dots by oxidizing coal with sulfuric acid and nitric acid. (YeR.Q., XiangC.S., LinJ., etal., Coalasanabundantsourceofgraphemequantumdots,NATURECOMMUNICATIONS,2013,4,2943-2949.) At present, there are two trends for the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B01J27/24C09K11/65B82Y30/00
CPCB01J27/24C01P2002/72C01P2002/80C01P2002/82C01P2002/84C01P2002/85C01P2004/04C09K11/65
Inventor 张青红魏婕王宏志李耀刚
Owner DONGHUA UNIV
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