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Preparation method of carbon quantum dots based on atmospheric pressure micro-plasma technology

A technology of micro-plasma and carbon quantum dots, which is applied in the field of preparation of nano-material technology, can solve the problems of complex purification operations and large energy consumption, and achieve the effects of high fluorescence intensity, easy operation, and low energy consumption

Inactive Publication Date: 2013-02-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods consume a lot of energy and require more complicated subsequent purification operations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Wash one 100ml volumetric flask, two 50ml beakers and one φ7 Petri dish in ultrapure water for 30 minutes. After cleaning, dry it for later use; weigh 9.01 grams of D-fructose with an electronic balance, and pour it into a 50ml beaker , add about 40ml of ultrapure water to completely dissolve D-fructose in ultrapure water to obtain a colorless, clear and transparent solution; weigh 0.02 grams of sodium hydroxide with an electronic balance, pour it into a 50ml beaker, add ultrapure water for about 40ml, so that sodium hydroxide is completely dissolved in ultrapure water to obtain a colorless, clear and transparent solution; pour the D-fructose solution into a 100ml flask, then quickly pour the sodium hydroxide solution into the flask, and add ultrapure water To the scale line, prepare a mixed solution of D-fructose and sodium hydroxide to obtain a solution with a concentration of D-fructose and sodium hydroxide of 500mM and 5mM respectively; take part of the mixed solutio...

Embodiment 2

[0028] Wash one 100ml volumetric flask, two 50ml beakers and one φ7 Petri dish in ultrapure water for 30 minutes. After cleaning, dry it for later use; weigh 9.01 grams of D-fructose with an electronic balance, and pour it into a 50ml beaker , add about 40ml of ultra-pure water to completely dissolve D-fructose in ultra-pure water to obtain a colorless, clear and transparent solution; weigh 0.042 grams of sodium bicarbonate with an electronic balance, pour it into a 50ml beaker, add ultra-pure water for about 40ml, so that sodium hydroxide is completely dissolved in ultrapure water to obtain a colorless, clear and transparent solution; pour the D-fructose solution into a 100ml flask, then quickly pour the sodium hydroxide solution into the flask, and add ultrapure water To the scale line, it is prepared into a mixed solution of D-fructose and sodium bicarbonate, and the concentration of D-fructose and sodium bicarbonate is respectively 500mM and 250mM; On the test bench; adjus...

Embodiment 3

[0031] Wash one 100ml volumetric flask, two 50ml beakers and one φ7 Petri dish in ultrapure water for 30 minutes. After cleaning, dry it for later use; weigh 9.01 grams of D-fructose with an electronic balance, and pour it into a 50ml beaker , add about 40ml of ultrapure water to completely dissolve D-fructose in ultrapure water to obtain a colorless, clear and transparent solution; weigh 0.068 grams of potassium dihydrogen phosphate with an electronic balance, pour it into a 50ml beaker, and add ultrapure water About 40ml, completely dissolve sodium hydroxide in ultrapure water to obtain a colorless, clear and transparent solution; pour D-fructose solution into a 100ml flask, then quickly pour sodium hydroxide solution into the flask, and add ultrapure Water to the scale line, prepared as a mixed solution of D-fructose and sodium dihydrogen phosphate, to obtain solutions with D-fructose and sodium dihydrogen phosphate concentrations of 500mM and 5mM respectively; take part of ...

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Abstract

The invention provides a preparation method of carbon quantum dots based on atmospheric pressure micro-plasma technology. The method comprises a first step of preparing a D-fructose solution; a second step of preparing a solution of sodium hydroxide, or sodium bicarbonate potassium or dihydrogen phosphate; a third step of mixing the D-fructose solution with the solution of sodium hydroxide, or sodium bicarbonate potassium or dihydrogen phosphate; and a fourth step of performing atmospheric pressure micro-plasma electro discharge treatment on the mixed solution to obtain a carbon quantum dot solution. The preparation method is simple and economic, is easy to operate, and has extremely low energy consumption. The prepared carbon quantum dots have high fluorescent intensity, can transform ultraviolet light to blue visible light, have no biological toxicity and no pollutions to the environment, and have great application potentiality in improving conversion efficiency of solar cells and in the fields of biological labels, biological medicine and the like.

Description

technical field [0001] The invention relates to a preparation method in the technical field of nanometer materials, in particular to a method for preparing carbon quantum dots assisted by micro plasma. Background technique [0002] Carbon quantum dots are a new class of nanomaterials with fluorescent properties. Fluorescent materials have good application prospects in biomarkers, biomedicine, and solar cell conversion efficiency. However, currently many types of fluorescent materials contain toxic heavy metals such as Se and Te, which limits the application range of such fluorescent materials. As a new type of nanomaterial, carbon quantum dots are not only non-biologically toxic and harmless to the environment, but most of the current methods for preparing carbon quantum dots are simple to operate and easy to implement. The current relatively simple and economical methods for preparing carbon quantum dots mainly include microwave method and hydrothermal method, as well as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00C09K11/65C01B32/15
Inventor 钟晓霞李永胜黄逊志路毅闫婷婷徐少锋
Owner SHANGHAI JIAO TONG UNIV
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