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Preparation method of water-soluble bi-colour fluorinated graphene quantum dot

A fluorinated graphene and fluorinated graphite technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of uneven size of quantum dots, use of highly toxic gases, expensive preparation costs, etc., and achieve high light stability, Mild conditions and good dispersion

Active Publication Date: 2015-09-30
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a simple and effective method for preparing fluorinated graphene quantum dots, so as to solve the problems of high preparation cost, complicated process, use of highly toxic gas and uneven size of quantum dots.

Method used

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  • Preparation method of water-soluble bi-colour fluorinated graphene quantum dot
  • Preparation method of water-soluble bi-colour fluorinated graphene quantum dot
  • Preparation method of water-soluble bi-colour fluorinated graphene quantum dot

Examples

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Effect test

Embodiment 1

[0032] Example 1: Preparation of blue fluorescent fluorinated graphene quantum dots

[0033] 200 mg of fluorinated graphite was added to 40 mL of N-methylpyrrolidone, heated to reflux, ultrasonically treated, and the upper layer solution was suction filtered and washed to obtain fluorinated graphene. After uniformly mixing 100mg fluorinated graphene and 320mg mixed alkali, the normal pressure is 170 o C heating reaction is processed to fluorinated graphene color and turns black. After adding a dissolved amount of water to dissolve, ultrasonically disperse, and then undergo suction filtration, washing, and drying to obtain modified fluorinated graphene. Add 100mg of modified fluorinated graphene into 80mL of mixed acid, after ultrasonic dispersion, at 60 o C reflux for 24 hours. Pour out the reaction product and dilute it with water, adjust the pH to 8 with sodium carbonate, and put the filtrate into a dialysis bag with a molecular weight of 500-3000Da for dialysis to obtain...

Embodiment 2

[0034] Example 2: Preparation of yellow fluorescent fluorinated graphene quantum dots

[0035] The modified fluorinated graphene obtained in 100mg example 1 is added in the mixed acid of 80mL, after ultrasonic dispersion, at 80 o C reflux for 24 hours. Pour out the reaction product and dilute it with water, adjust the pH to 8 with sodium carbonate, and put the filtrate into a dialysis bag with a molecular weight of 500-3000Da for dialysis after suction filtration to obtain yellow fluorescent fluorinated graphene quantum dots with good water solubility and chemical stability .

Embodiment 3

[0036] Example 3: Preparation of blue fluorescent fluorinated graphene quantum dots

[0037] Replace "40mL N-methylpyrrolidone" in Example 1 with "40mL ethanol". Other conditions of preparation were the same as in Example 1, and a product similar to Example 1 was obtained.

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Abstract

The invention discloses a preparation method of a water-soluble bi-colour fluorinated graphene quantum dot. The preparation method of the water-soluble bi-colour fluorinated graphene quantum dot is characterized in that graphite fluoride is taken as a raw material, and stripping, modification and refluxing are carried out, so that a blue and yellow fluorescent fluorinated graphene quantum dot with good water solubility and stable chemical properties is obtained. The obtained water-soluble bi-colour fluorinated graphene quantum dot has great application prospects in the aspects of biology and sensing as well as photovoltaic devices, and is a novel fluorescent nano material with a high application value.

Description

technical field [0001] The invention relates to a preparation technology of fluorinated graphene quantum dots, in particular to a preparation technology of two-color fluorinated graphene quantum dots with good water solubility and stable chemical properties. Background technique [0002] In the past decade, graphene has shown promising research and application value in the scientific and industrial circles due to its excellent optical, electrical, thermal and mechanical properties. The band gap of graphene can be opened by chemical modification or reducing its size, which greatly promotes graphene to enter the stage of practical application. The graphene quantum dots formed by reducing the size of graphene to less than 10nm not only exhibit the advantages of stable fluorescence, high specific surface area and adjustable energy gap, but also have low cytotoxicity and excellent biocompatibility , These properties make graphene quantum dots have great application prospects in ...

Claims

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Application Information

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IPC IPC(8): C01B31/00C09K11/65
Inventor 王金清公培伟杨生荣
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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