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Preparation of phosphate radical-responsive carbon quantum dots and application of phosphate radical-responsive carbon quantum dots in fingerprint fluorescence recognition

A technology of carbon quantum dots and fluorescence recognition, which is applied in the direction of fluorescence/phosphorescence, nano-carbon, luminescent materials, etc., can solve the problems of unfavorable large-scale production and application, and achieve the effect of low cost, simple preparation process and good stability

Active Publication Date: 2021-01-29
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This imaging method requires the use of toxic metal ions and the optimization of multiple parameters, which is not conducive to large-scale production and application

Method used

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  • Preparation of phosphate radical-responsive carbon quantum dots and application of phosphate radical-responsive carbon quantum dots in fingerprint fluorescence recognition
  • Preparation of phosphate radical-responsive carbon quantum dots and application of phosphate radical-responsive carbon quantum dots in fingerprint fluorescence recognition
  • Preparation of phosphate radical-responsive carbon quantum dots and application of phosphate radical-responsive carbon quantum dots in fingerprint fluorescence recognition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. Add 50mL of ultrapure water to a 100mL beaker, then add 0.15mmol of 1,2,4-glucinol, and stir for 3 minutes with magnetic force to obtain a 1,2,4-glucinol solution.

[0042] 2. Put the 1,2,4-glucinol solution obtained in step 1 into a polytetrafluoroethylene-lined autoclave, react at 170°C for 6 hours, centrifuge at 8000r / min after the reaction is completed, and take The supernatant was used for later use.

[0043] 3. The supernatant obtained in step 2 was subjected to rotary evaporation and vacuum freeze-drying to obtain a black solid powder.

[0044] 4. Dissolve 0.3 mg of the solid powder obtained in step 3 in 1 mL of ultrapure water to obtain a mother liquor for use.

[0045] 5. Observing the mother liquor under a field emission transmission electron microscope, the size of the carbon quantum dots is 0.31 to 3.19 nm, and the average particle diameter is about 1.7 ± 0.38 nm (see attached figure 1 ). The obtained solid powder is tested by high-resolution transmiss...

Embodiment 2

[0049] 1. Add 50mL of ultrapure water to a 100mL beaker, then add 0.074mmol of 1,2,4-glucinol, and stir for 3 minutes with magnetic force to obtain a 1,2,4-glucinol solution.

[0050] 2. Put the 1,2,4-glucinol solution obtained in step 1 into a polytetrafluoroethylene-lined autoclave, react at 150°C for 4 hours, centrifuge at 8000r / min after the reaction is completed, and take The supernatant was used for later use.

[0051] 3. The supernatant obtained in step 2 was subjected to rotary evaporation and vacuum freeze-drying to obtain a black solid powder.

[0052] 4. Dissolve 0.3 mg of the solid powder obtained in step 3 in 1 mL of ultrapure water to obtain a mother liquor for use.

Embodiment 3

[0054] 1. Add 50mL of ultrapure water to a 100mL beaker, then add 0.3mmol of 1,2,4-glucinol, and stir for 3 minutes with magnetic force to obtain a 1,2,4-glucinol solution.

[0055] 2. Put the 1,2,4-glucinol solution obtained in step 1 into a polytetrafluoroethylene-lined autoclave, react at 180°C for 8 hours, centrifuge at 12000r / min after the reaction is completed, and take The supernatant was used for later use.

[0056] 3. The supernatant obtained in step 2 was subjected to rotary evaporation and vacuum freeze-drying to obtain a black solid powder.

[0057] 4. Dissolve 0.3 mg of the solid powder obtained in step 3 in 1 mL of ultrapure water to obtain a mother liquor for use.

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Abstract

The invention relates to preparation of phosphate radical-responsive carbon quantum dots and application of the phosphate radical-responsive carbon quantum dots in fingerprint fluorescence recognition. The method comprises the following steps of: 1, adding 1, 2, 4-trihydroxybenzene into ultrapure water, and performing stirring to obtain a 1, 2, 4-trihydroxybenzene solution; 2, putting the solutionobtained in the step 1 into a high-pressure reaction kettle lined with polytetrafluoroethylene for reaction; performing centrifuging after finishing the reaction, and taking supernatant for later use; and 3, carrying out rotary evaporation on the supernatant obtained in the step 2, and carrying out vacuum freeze drying to obtain black solid powder which is the carbon quantum dots. The preparationmethod is simple in process, low in cost, and good in stability; and no fluorescence exists in ultrapure water.

Description

technical field [0001] The invention relates to the technical field of application of carbon quantum dots, in particular to the preparation of a phosphate-responsive carbon quantum dot and its application for fingerprint fluorescence identification. Background technique [0002] As important personal information, fingerprints have been widely used in fields such as forensic science, criminal investigation, biometrics and medical diagnosis, because fingerprints are unique to each person and do not change with age (Analytical Methods, 2016, 8:6293 -6297). In many cases, fingerprints are invisible (latent fingerprints) and can only be seen directly with the naked eye after treatment with specific methods (Journal of Colloid and Interface Science, 2018, 518:200-215). Therefore, the development of new technologies to "visualize" fingerprints is crucial for the visual identification of invisible fingerprints. Generally, the sweat secreted from the sweat pores on the surface of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C01B32/15B82Y40/00B82Y20/00G01N21/64
CPCC09K11/65C01B32/15G01N21/6428B82Y20/00B82Y40/00G01N2021/6439
Inventor 徐勇前杨历
Owner NORTHWEST A & F UNIV
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