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Method for synthesizing carbon quantum dots by using hydrolyzed polymaleic anhydride as main raw material

A technology of polymaleic anhydride and carbon quantum dots, which is applied in the field of fluorescent materials to achieve the effects of stable chemical properties, simple preparation process, and low cost of raw materials

Inactive Publication Date: 2020-08-28
山东丰益泰和科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are currently no relevant patents and literature reports on the synthesis of carbon quantum dots from low-molecular materials such as polymaleic anhydride.

Method used

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  • Method for synthesizing carbon quantum dots by using hydrolyzed polymaleic anhydride as main raw material
  • Method for synthesizing carbon quantum dots by using hydrolyzed polymaleic anhydride as main raw material
  • Method for synthesizing carbon quantum dots by using hydrolyzed polymaleic anhydride as main raw material

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Embodiment 1

[0038] This embodiment provides a method for synthesizing carbon quantum dots by hydrolyzing polymaleic anhydride, including the following processes:

[0039] Weigh 2.5000g HPMA (Tech, 50%) and dissolve in 46.2500g deionized water, stir well;

[0040] Add 1.2626g of ethylenediamine (Tech, 99%) solution (mass ratio HPMA / EN=1:1) to the above system, mix well, and place in a closed hydrothermal reaction synthesis kettle;

[0041] The reaction kettle was placed in an oven and heated to 180°C, reacted for 5 hours, and naturally cooled to room temperature to obtain a brownish-yellow liquid;

[0042] The above-mentioned brownish-yellow liquid passed through After filtering through the microporous membrane, the fluorescent carbon quantum dot solution is obtained.

[0043] Get this fluorescent carbon quantum dot solution dilution, by absorption spectrum scanning, the characteristic absorption peak that obtains this quantum dot is 327nm ( figure 1 ); further dilute the fluorescent c...

Embodiment 2

[0046] This embodiment provides a method for synthesizing carbon quantum dots by hydrolyzing polymaleic anhydride, including the following processes:

[0047] Weigh 3.3333g HPMA (Tech, 50%) and dissolve in 45.8334g deionized water, stir well;

[0048]Add 0.8333g of ethylenediamine (Tech, 99%) solution (mass ratio HPMA / EN=2:1) ​​to the above system, mix well, and place in a closed hydrothermal reaction synthesis kettle;

[0049] The reaction kettle was placed in an oven and heated to 180°C, reacted for 5 hours, and naturally cooled to room temperature to obtain a brownish-yellow liquid;

[0050] The above-mentioned brownish-yellow liquid passed through After filtering through the microporous membrane, the fluorescent carbon quantum dot solution is obtained.

Embodiment 3

[0052] This embodiment provides a method for synthesizing carbon quantum dots by hydrolyzing polymaleic anhydride, including the following processes:

[0053] Weigh 1.6667g HPMA (Tech, 50%) and dissolve in 46.6666g deionized water, stir well;

[0054] Add 1.6667g of ethylenediamine (Tech, 99%) solution (mass ratio HPMA / EN=0.5:1) to the above system, mix well, and place in a closed hydrothermal reaction synthesis kettle;

[0055] The reaction kettle was placed in an oven and heated to 180°C, reacted for 5 hours, and naturally cooled to room temperature to obtain a brownish-yellow liquid;

[0056] The above-mentioned brownish-yellow liquid passed through After filtering through the microporous membrane, the fluorescent carbon quantum dot solution is obtained.

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Abstract

The invention discloses a method for synthesizing carbon quantum dots by using hydrolyzed polymaleic anhydride (HPMA) as a main raw material, which comprises the following steps: dissolving the hydrolyzed polymaleic anhydride (HPMA) as the raw material into deionized water, and uniformly stirring; adding an organic amine solution into the system, and carrying out a closed hydrothermal reaction at140-230 DEG C; and after the reaction is finished, cooling and filtering the reaction solution to obtain a fluorescent carbon quantum dot solution. The fluorescent carbon quantum dots obtained by themethod emit blue fluorescence under an ultraviolet light source, and have the advantages of good water solubility, stable chemical properties, simple synthesis method, low raw material cost and the like.

Description

technical field [0001] The invention belongs to the technical field of fluorescent materials, and in particular relates to a method for synthesizing carbon quantum dots by hydrolyzing polymaleic anhydride. Background technique [0002] The preparation of carbon quantum dots (CQDs) has two methods: "top-down" and "bottom-up". The top-down preparation of carbon quantum dots is to peel off large-sized carbon targets into powder; including arc discharge Many synthesis methods for CQDs, such as laser ablation method, electrochemical method, microwave heating method, etc., have been developed, but some methods require complicated equipment or complicated processing technology. The bottom-up preparation is self-assembly of small-sized carbon sources through weak interactions; the synthesis of carbon quantum dots by the "bottom-up" method mostly uses organic small molecules or oligomers as carbon sources, and the commonly used ones are Citric acid, glucose, polyethylene glycol, ure...

Claims

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Application Information

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IPC IPC(8): C09K11/65G01N21/64B82Y20/00B82Y30/00
CPCB82Y20/00B82Y30/00C09K11/65G01N21/643
Inventor 刘晓伟王家庚高灿柱李小明杨春丽
Owner 山东丰益泰和科技有限公司
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