Nitrogen-doped carbon quantum dot and preparation method thereof

A technology of carbon quantum dots and nitrogen doping, applied in the field of quantum dots, can solve the problems of high energy consumption, low quantum yield, and complicated preparation process, and achieve the effects of low energy consumption, stable fluorescence performance, and simple operation

Inactive Publication Date: 2019-04-19
TCL CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a nitrogen-doped carbon quantum

Method used

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  • Nitrogen-doped carbon quantum dot and preparation method thereof

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Example Embodiment

[0043] Example 1

[0044] The method for preparing nitrogen-doped carbon quantum dots of this embodiment includes the following steps:

[0045] (1) The oxidation reaction process of phenolic hydroxyl group

[0046] 1.28 g of phloroglucinol and 27 mL of deionized water were added to a 100 mL three-necked flask and stirred at room temperature to obtain an aqueous solution of phloroglucinol. Next, 11 mL of hydrogen peroxide aqueous solution (30 wt%) was added to the above phloroglucinol aqueous solution and stirred at room temperature for 10 min to obtain a uniform brown solution.

[0047] (2) Schiff base polycondensation and carbonization reaction process

[0048] 1.08 g of p-phenylenediamine was added to the brown solution in (1) above, and after stirring uniformly, it was quickly transferred to a 50 mL autoclave and allowed to stand and react for 5 min. Finally, a black reaction liquid was obtained.

[0049] (3) Purification and collection process of nitrogen-doped carbon quantum dots

...

Example Embodiment

[0051] Example 2

[0052] The method for preparing nitrogen-doped carbon quantum dots of this embodiment includes the following steps:

[0053] (1) The oxidation reaction process of phenolic hydroxyl group

[0054] 1.28 g of phloroglucinol and 27 mL of deionized water were added to a 100 mL three-necked flask and stirred at room temperature to obtain an aqueous solution of phloroglucinol. Next, 11 mL of hydrogen peroxide aqueous solution (30 wt%) was added to the above phloroglucinol aqueous solution and stirred at room temperature for 10 min to obtain a uniform brown solution.

[0055] (2) Schiff base polycondensation and carbonization reaction process

[0056] 1.23 g of p-Phenylenetriamine was added to the brown solution in (1) above, and after stirring evenly, it was quickly transferred to a 50 mL autoclave and allowed to stand and react for 5 min. Finally, a black reaction liquid was obtained.

[0057] (3) Purification and collection process of nitrogen-doped carbon quantum dots

[0...

Example Embodiment

[0059] Example 3

[0060] The method for preparing nitrogen-doped carbon quantum dots of this embodiment includes the following steps:

[0061] (1) The oxidation reaction process of phenolic hydroxyl group

[0062] 2.26 g of anthratriol and 27 mL of deionized water were added to a 100 mL three-necked flask and stirred at room temperature to obtain an aqueous solution of anthratriol. Next, 11 mL of hydrogen peroxide aqueous solution (30 wt%) was added to the above anthratriol aqueous solution and stirred at room temperature for 10 min to obtain a uniform brown solution.

[0063] (2) Schiff base polycondensation and carbonization reaction process

[0064] 1.08 g of p-phenylenediamine was added to the brown solution in (1) above, and after stirring uniformly, it was quickly transferred to a 50 mL autoclave and allowed to stand and react for 5 min. Finally, a black reaction liquid was obtained.

[0065] (3) Purification and collection process of nitrogen-doped carbon quantum dots

[0066] Ta...

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Abstract

The invention discloses a nitrogen-doped carbon quantum dot and a preparation method thereof. The method comprises the following steps: providing an organic phenol, mixing the organic phenol with peroxide in a solvent to carry out a phenolic hydroxyl oxidation reaction to obtain an organic hydrazine; and providing an organic amine to react with the organic hydrazine in a closed environment to obtain the nitrogen-doped carbon quantum dot. By using organic phenol, organic amine, peroxide and deionized water as raw materials, the nitrogen-doped carbon quantum dot which has stable fluorescence performance and stable chemical properties and is dispersible in water and environment-friendly is synthesized. By regulating the ratio of the raw materials and the reaction time, the structure, particlesize and optical performance of the nitrogen-doped carbon quantum dot are regulated. No heat source is needed by the method such that energy consumption is low, cost is low and operation is simple. Meanwhile, the nitrogen-doped carbon quantum dot material prepared by the method does not contain heavy metals such as Cd and Te, and has wider application fields than traditional quantum dot materials.

Description

technical field [0001] The invention relates to the field of quantum dots, in particular to a nitrogen-doped carbon quantum dot and a preparation method thereof. Background technique [0002] Due to their unique optical properties, quantum dot materials are considered to have a wide range of applications in optoelectronic displays, medical monitoring, biosensors and other fields, and have become a research hotspot. However, traditional quantum dot materials contain heavy metal elements such as Cd and Te, which are not only expensive, but also have strong biological toxicity; on the other hand, traditional quantum dot materials need to strictly control the moisture and oxygen content of the system during the preparation process , which puts strict requirements on the synthesis equipment and process of quantum dot materials. The above two aspects limit the application and development of quantum dot materials. [0003] In recent years, various environmentally friendly and low...

Claims

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Application Information

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IPC IPC(8): C09K11/65B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/65
Inventor 丘洁龙
Owner TCL CORPORATION
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