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Carbon quantum dot synthesis

A technology of carbon quantum dots and synthesis methods, which is applied in the fields of nano-carbon, nano-technology, nano-optics, etc., can solve many problems, and achieves the effects of wide range of uses, simple synthesis method and no pollution to the environment.

Inactive Publication Date: 2017-05-31
YANTAI SMITHDE ELECTROMECHANICAL EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on the toxicity of carbon quantum dots is mainly based on its application in the field of biological cells, but from the current situation, there are not many related experiments to study the toxicity of carbon quantum dots, and the research is still in the early stage of development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] First, take 5.0g of L-cystine and dissolve it in 50ml of NaOH solution with a concentration of 0.95mol / L, put it into an ultrasonic cleaner and sonicate until the solution becomes clear; put it into a microwave reactor, and set the microwave reaction time is 30s, the reaction temperature is 150°C, and the power is 800W. After the sample is cooled, it is centrifuged, the centrifugation time is 10min, and the rotation speed is 10000rpm / min, to remove the residual large particles such as precipitation, and then obtain the carbon quantum dots dispersed in the water phase, and the obtained carbon quantum dots are reserved for characterization and analysis. Further experiments afterwards.

Embodiment 2

[0010] First, take 5.0g of L-cystine and dissolve it in 70ml of NaOH solution with a concentration of 0.95mol / L, put it into an ultrasonic cleaner and sonicate until the solution becomes clear; put it into a microwave reactor and set the microwave reaction time 50s, the reaction temperature is 150°C, and the power is 800W. After the sample is cooled, it is centrifuged, the centrifugation time is 10min, and the rotation speed is 10000rpm / min, to remove the residual large particles such as precipitation, and then obtain the carbon quantum dots dispersed in the water phase, and the obtained carbon quantum dots are reserved for characterization and analysis. Further experiments afterwards.

Embodiment 3

[0012] First, take 5.0g of L-cystine and dissolve it in 60ml of NaOH solution with a concentration of 0.95mol / L, put it into an ultrasonic cleaner and sonicate until the solution becomes clear; put it into a microwave reactor and set the microwave reaction time is 40s, the reaction temperature is 150°C, and the power is 800W. After the sample is cooled, it is centrifuged, the centrifugation time is 10min, and the rotation speed is 10000rpm / min, to remove the residual large particles such as precipitation, and then obtain the carbon quantum dots dispersed in the water phase, and the obtained carbon quantum dots are reserved for characterization and analysis. Further experiments afterwards.

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Abstract

The invention relates to a carbon quantum dot synthesis method. The carbon quantum dot synthesis method comprises the following steps: taking 5.0 g of L-cystine and dissolving L-cystine in 50-70 ml of a NaOH solution with concentration of 0.95 mol / L, placing the material in a ultrasonic cleaner until the solution is clarified; placing the material in a microwave reactor, setting the reaction time of 30-50 s, reaction temperature at 150 DEG C and power of 800 W; performing centrifugation for 10 min after a sample is cooled at the rotating speed of 10000 rpm / min to remove the residual large granule substances such as precipitate, and obtained carbon quantum dots dispersed in a water phase. The obtained carbon quantum dots are taken as representation and can be used for further experiment.

Description

technical field [0001] The invention relates to the synthesis of carbon quantum dots, belonging to the field of synthetic chemistry. Background technique [0002] Carbon quantum dots with good water solubility and fluorescence, due to the low price of raw materials required, safe preparation process, no toxic substances and environmental friendliness, greatly meet the standards of green chemistry in people's minds, and gradually become our future chemistry. The mainstream of development has attracted more and more attention from scientific researchers. In addition, an important feature of carbon quantum dots is the photoluminescence characteristic. The size of the carbon dot particles is uniform and has a certain dependence on the excitation wavelength. [16] . These properties are complementary, for example, the particle size and surface state of carbon quantum dots will affect their photoluminescent properties. In recent years, many methods for synthesizing fluorescent c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C01B32/15B82Y20/00
Inventor 王立印
Owner YANTAI SMITHDE ELECTROMECHANICAL EQUIP MFG