Method for preparing water-soluble nitrogen phosphorus codoped carbon quantum dot by taking glucose, strong phosphoric acid and ethanediamine as raw materials

A carbon quantum dot and glucose technology, which is applied in the field of preparation of water-soluble nitrogen and phosphorus co-doped carbon quantum dots, can solve the problems of unfavorable continuous and large-scale production of fluorescent carbon quantum dots, low carbon quantum yield, non-renewable energy and the like, Achieve considerable economic benefits, stable fluorescence, and shorten the production cycle.

Inactive Publication Date: 2017-11-24
GUANGXI TEACHERS EDUCATION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method often requires strict experimental conditions and special energy sources, the cost is high, and the obtained carbon quantum yield is relatively low
Bottom-up synthesis method, that is, direct synthesis of fluorescent carbon quantum dots by pyrolysis or carbonization of suitable prec

Method used

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  • Method for preparing water-soluble nitrogen phosphorus codoped carbon quantum dot by taking glucose, strong phosphoric acid and ethanediamine as raw materials
  • Method for preparing water-soluble nitrogen phosphorus codoped carbon quantum dot by taking glucose, strong phosphoric acid and ethanediamine as raw materials
  • Method for preparing water-soluble nitrogen phosphorus codoped carbon quantum dot by taking glucose, strong phosphoric acid and ethanediamine as raw materials

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Embodiment 1

[0035] A method for preparing water-soluble nitrogen-phosphorus co-doped carbon quantum dots using glucose, concentrated phosphoric acid and ethylenediamine as raw materials, comprising the following steps:

[0036] S1, preparation of glucose precursor solution;

[0037] S2. Mixing the glucose precursor solution and concentrated phosphoric acid at a volume ratio of 1:3 to obtain a first mixed solution;

[0038] S3. Stir the first mixed solution obtained in S2 evenly, place it in an incubator, and heat it to obtain a brown solution and cool it to room temperature;

[0039] S4. Put the cooled brown solution in S3 in an ice-water bath and mix the brown solution and ethylenediamine at a volume ratio of 5:1, and add ultrapure water to dilute to obtain a second mixed solution, and filter the second mixed solution , to obtain the filtrate;

[0040] S5, dialyzing the filtrate to obtain a dialysate;

[0041] S6. Evaporating the dialysate under constant temperature conditions to obta...

Embodiment 2

[0048] A method for preparing water-soluble nitrogen-phosphorus co-doped carbon quantum dots using glucose, concentrated phosphoric acid and ethylenediamine as raw materials, comprising the following steps:

[0049] S1, preparation of glucose precursor solution;

[0050] S2. Mixing the glucose precursor solution and concentrated phosphoric acid at a volume ratio of 2:3 to obtain a first mixed solution;

[0051] S3. Stir the first mixed solution obtained in S2 evenly, place it in an incubator, and heat it to obtain a brown solution and cool it to room temperature;

[0052] S4. Put the cooled brown solution in S3 in an ice-water bath and mix the brown solution and ethylenediamine at a volume ratio of 5:1, and add ultrapure water to dilute to obtain a second mixed solution, and filter the second mixed solution , to obtain the filtrate;

[0053] S5, dialyzing the filtrate to obtain a dialysate;

[0054] S6. Evaporating the dialysate under constant temperature conditions to obtain...

Embodiment 3

[0061] A method for preparing water-soluble nitrogen-phosphorus co-doped carbon quantum dots using glucose, concentrated phosphoric acid and ethylenediamine as raw materials, comprising the following steps:

[0062] S1, preparation of glucose precursor solution;

[0063] S2. Mixing the glucose precursor solution and concentrated phosphoric acid at a volume ratio of 3:3 to obtain the first mixed solution;

[0064] S3. Stir the first mixed solution obtained in S2 evenly, place it in an incubator, and heat it to obtain a brown solution and cool it to room temperature;

[0065] S4. Put the cooled brown solution in S3 in an ice-water bath and mix the brown solution and ethylenediamine at a volume ratio of 5:2, and add ultrapure water to dilute to obtain a second mixed solution, and filter the second mixed solution , to obtain the filtrate;

[0066] S5, dialyzing the filtrate to obtain a dialysate;

[0067] S6. Evaporating the dialysate under constant temperature conditions to ob...

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Abstract

The invention provides a method for preparing a water-soluble nitrogen phosphorus codoped carbon quantum dot by taking glucose, strong phosphoric acid and ethanediamine as raw materials. The method comprises the following steps: S1, preparing a glucose precursor solution; S2, mixing the glucose precursor solution and strong phosphoric acid according to the volume ratio of (1-5):3 to obtain a first mixed solution; S3, heating the first mixed solution obtained in the S2 to obtain a brown solution; S4, putting the brown solution in the S3 under the ice-water bath condition, mixing the brown solution and ethanediamine according to the volume ratio of 5:(1-5) to obtain a second mixed solution, and filtering the second mixed solution to obtain filtrate; S5, dialyzing the filtrate to obtain dialyzate; and S6, evaporating the dialyzate to obtain the water-soluble nitrogen phosphorus codoped carbon quantum dot. The preparation method of the water-soluble nitrogen phosphorus codoped carbon quantum dot has the following advantages: the carbon source is rich and cheap; the preparation process is simple; the whole preparation process is pollution-free, non-toxic and environment-friendly; and large-scale preparation can be realized.

Description

technical field [0001] The invention belongs to the technical field of fluorescent material preparation, and specifically relates to a preparation method of water-soluble nitrogen-phosphorus co-doped carbon quantum dots using glucose, concentrated phosphoric acid and ethylenediamine as raw materials under mild conditions. Background technique [0002] In recent years, fluorescent carbon nanomaterials have attracted extensive research by researchers because of their good optical properties and low cytotoxicity. It has good photostability and no toxic side ions, is suitable for long-term detection and tracing experiments, and has broad application prospects in biomarkers and analysis and detection. Carbon quantum dots (CQDs) exhibit excellent properties such as hydrophilicity, low cytotoxicity, chemical and photostability, etc., which have attracted extensive attention and applications in the fields of chemistry, biomedicine, sensing and optoelectronics. [0003] There are cu...

Claims

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Application Information

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IPC IPC(8): C09K11/70C09K11/65B82Y20/00B82Y30/00B82Y40/00
CPCC09K11/70B82Y20/00B82Y30/00B82Y40/00C09K11/65
Inventor 黄珊肖琦杨二利刘义
Owner GUANGXI TEACHERS EDUCATION UNIV
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