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Preparation method of carbon quantum dots based on chemical reaction of fructose and sodium hydroxide

A technology of sodium hydroxide and carbon quantum dots, which is applied in the field of preparation of nanomaterials technology to achieve great application potential, easy operation, and high fluorescence intensity

Inactive Publication Date: 2014-10-15
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are easy to implement and convenient to operate, but they all have a common disadvantage, that is, the preparation process of carbon quantum dots requires a certain amount of energy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Wash one 100ml volumetric flask and two 50ml beakers in ultrapure water for 30 minutes. After cleaning, dry them for later use; weigh 9.01 grams of D-fructose with an electronic balance, pour them into a 50ml beaker, and add ultrapure water About 40ml, D-fructose is completely dissolved in ultrapure water to obtain a colorless, clear and transparent solution; use an electronic balance to weigh 2.00 grams of sodium hydroxide, pour it into a 50ml beaker, add about 40ml of ultrapure water, and oxidize the hydroxide The sodium 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 mark to prepare Become the mixed solution of D-fructose and sodium hydroxide, obtain the solution that D-fructose and sodium hydroxide concentration are 500mM; Stand still for 30 minutes, obtain yellow clear and tr...

Embodiment 2

[0027] Wash one 100ml volumetric flask and two 50ml beakers in ultrapure water for 30 minutes. After cleaning, dry them for later use; weigh 9.01 grams of D-fructose with an electronic balance, pour them into a 50ml beaker, and add ultrapure water About 40ml, D-fructose is completely dissolved in ultrapure water to obtain a colorless, clear and transparent solution; use an electronic balance to weigh 1.00 grams of sodium hydroxide, pour it into a 50ml beaker, add about 40ml of ultrapure water, and oxidize the hydroxide The sodium 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 mark to prepare Become the mixed solution of D-fructose and sodium hydroxide, obtain the solution that D-fructose concentration 500mM and sodium hydroxide concentration are 250mM; Stand still for 60 minutes, obtain...

Embodiment 3

[0030] Wash one 100ml volumetric flask and two 50ml beakers in ultrapure water for 30 minutes. After cleaning, dry them for later use; weigh 9.01 grams of D-fructose with an electronic balance, pour them into a 50ml beaker, and add ultrapure water About 40ml, D-fructose is completely dissolved in ultrapure water to obtain a colorless, clear and transparent solution; use an electronic balance to weigh 4.00 grams of sodium hydroxide, pour it into a 50ml beaker, add about 40ml of ultrapure water, and oxidize the hydroxide The sodium 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 mark to prepare Become the mixed solution of D-fructose and sodium hydroxide, obtain the solution that D-fructose concentration is 500mM and sodium hydroxide concentration is 1M; Stand still for 50 days, obtain yel...

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Abstract

The invention provides a preparation method of carbon quantum dots based on a chemical reaction of fructose and sodium hydroxide, and belongs to the technical field of nanomaterials. The method comprises a first step of preparing a D-fructose solution; a second step of preparing a sodium hydroxide solution; a third step of mixing the D-fructose solution with sodium hydroxide solution; and a fourth step of standing 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 green visible light, have no biological toxicity and no pollutions to the environment, and have great application potentiality in 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 nanomaterials, in particular to a preparation method of carbon quantum dots based on the chemical reaction between fructose and sodium hydroxide. Background technique [0002] When an electron transitions from a high energy level to a low energy level, due to the existence of the relaxation phenomenon, the energy of the emitted photon is less than the energy difference between the two energy levels. The phenomena are called photoluminescence (photon excitation causes electrons to transition from a lower energy level to a higher energy level), electroluminescence (electric field excitation causes electrons to transition from a lower energy level to a higher energy level), and chemiluminescence (chemical excitation causes electrons to transition from a lower energy level transition to higher energy levels). Photoluminescence, electroluminescence, and chemiluminescence are collective...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65
Inventor 钟晓霞李永胜路毅黄逊志闫婷婷徐少锋
Owner SHANGHAI JIAO TONG UNIV
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