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Chemical preparation method for nitrogen-doped graphene quantum dot

A technology of graphene quantum dots and nitrogen doping, applied in the field of nanomaterials, can solve the problems of low yield, cumbersome process, and high cost, and achieve the effects of high purity and yield, good application prospects, and simple synthesis process

Inactive Publication Date: 2014-11-19
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the deficiencies and shortcomings of the prior art, such as high cost, cumbersome process, and low yield, and provide a novel method for preparing azagraphene quantum dots

Method used

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  • Chemical preparation method for nitrogen-doped graphene quantum dot
  • Chemical preparation method for nitrogen-doped graphene quantum dot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Preparation of nitrogen miscellane graphene

[0027] Add 15 mg to the cup and 90 mg of 90 mg of glycine to disperse them in 5 ml to remove ionic water.Place the above alumina porcelain boat in a tube furnace and surround the atmosphere of 5 o The speed of C / Min rises to 500 o C. Keep the temperature for 2 hours, and then cooled naturally to get nitrogen graphene tablets.

[0028] 2. Preparation of nitrogen miscellaneous graphene quantum dots (N-GQDS)

[0029] A. The nitrogen miscellane tablets described in step 1 is scattered in a mixed solvent of concentrated nitric acid and concentrated sulfuric acid, ultrasonic for 16 hours, and then diluted it with an appropriate amount of waterMicro -hole filter membrane removes the acid in it to obtain oxidized nitrogen mixed graphene tablets; nitrogen miscellane tablets per 50 mg, 20 mL concentrated nitric acid, and 5 mL concentrated sulfuric acid.

[0030] B. Reappear the solid oxidized nitrogen graphene tablets that are attached...

Embodiment 2

[0035] 1. Preparation of nitrogen miscellane graphene

[0036] Add 15 mg to the cup and 120 mg of glycopicine to disperse it in 5 ml to remove the ionic water.Place the above alumina porcelain boat in a tube furnace and surround the atmosphere of 5 o The speed of C / Min rises to 500 o C. Keep the temperature for 2 hours, and then cooled naturally to get nitrogen graphene tablets.

[0037] 2. Preparation of nitrogen miscellaneous graphene quantum dots (N-GQDS)

[0038] A. Mixed solubility of nitrogen miscellane tablets described in step 1 is scattered in concentrated nitric acid and concentrated sulfuric acid

[0039] In the agent, 20 hours of ultrasound, then dilute it with an appropriate amount of water to cool down, and then use a microforch filter film with a pore diameter to remove the acid to get the oxidized nitrogen graphene tablet;Tablets, 30 mL concentrated nitric acid, 10 mL concentrated sulfuric acid.

[0040] B. Reappear the solid oxidized nitrogen graphene tablets that...

Embodiment 3

[0047] 1. Preparation of nitrogen miscellane graphene

[0048] Add 15 mg to the cup and 150 mg of glycopicine to disperse them in 5 ml to remove ionic water.Place the above alumina porcelain boat in a tube furnace and surround the atmosphere of 5 o The speed of C / Min rises to 500 o C. Keep the temperature for 2 hours, and then cooled naturally to get nitrogen graphene tablets.

[0049] 2. Preparation of nitrogen miscellaneous graphene quantum dots (N-GQDS)

[0050] A. Mixed solubility of nitrogen miscellane tablets described in step 1 is scattered in concentrated nitric acid and concentrated sulfuric acid

[0051] In the agent, 24 hours of ultrasonic, then dilute it with an appropriate amount of water to cool down, and then use a micropodian filter membrane of 0.22 μm to remove the acid to get the oxidized nitrogen mixed graphene tablet;Film, 40 ml concentrated nitric acid, 20 mL concentrated sulfuric acid.

[0052] B. Reappear the solid oxidized nitrogen graphene tablets that are ...

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Abstract

The invention relates to a chemical preparation method for a nitrogen-doped graphene quantum dot, belonging to the technical field of nano materials. The invention particularly relates to a preparation method for the nitrogen-doped graphene quantum dot. The method comprises the following steps: firstly, by taking graphite oxide as a carbon source and glycine as a nitrogen source, preparing a nitrogen-doped graphene sheet under a high-temperature annealing condition; then, cutting the deeply oxidized nitrogen-doped graphene sheet into an oxidized nitrogen-doped graphene nano sheet; preparing the nitrogen-doped-graphene quantum dot with super-strong blue fluorescence by way of a hydrothermal reaction. The synthetic method of the nitrogen-doped graphene quantum dot provided by the invention is simple in synthetic process, all raw materials are cheap and easy to get in the market, and the prepared nitrogen-doped graphene quantum dot is high in purity and yield, mono-dispersible and good in water solubility, has a very strong blue fluorescence performance and has a very good application prospect in the application fields of lithium batteries, micro supercapacitors, biological fluorescent labels, solar batteries and the like.

Description

Technical field [0001] The present invention involves a preparation method of a nitrogen doped graphene quantum point (N-GQDS), which belongs to the field of nanomaterials technology. Background technique [0002] Since the discovery of a single -layer graphene at the University of Manchester at the University of Manchester in 2004, graphene has shown broad application prospects in research fields such as microelectronics, functional materials, and chemical sensing due to its unique and excellent physical chemical properties.In recent years, graphene quantum dots, as a new type of quantum dots, have attracted widespread interest in research due to its unique performance.Compared with graphene, graphene quantum dots show a stronger quantum restriction and boundary effect. In addition, graphene quantum dots also show low cytotoxicity, good water -soluble, chemical inertia, stable light glowingWaiting for performance, make it have good application prospects in the aspects of optoele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 王坤杜晓娇钱静蒋鼎
Owner JIANGSU UNIV
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