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Method for preparing tin powder modified high-stability nitrogen doped graphene quantum dot

A graphene quantum dot, high-stability technology, applied in the field of nanomaterials, can solve problems such as low quantum yield and unstable luminescence, and achieve the effects of good purity, improved quantum yield, and uniform size distribution

Inactive Publication Date: 2018-12-21
JIANGSU ANNATAI ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing tin powder-modified high-stability nitrogen-doped graphene quantum dots, so as to solve the problems of low quantum yield and unstable luminescence of graphene quantum dots proposed in the above-mentioned background technology

Method used

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  • Method for preparing tin powder modified high-stability nitrogen doped graphene quantum dot
  • Method for preparing tin powder modified high-stability nitrogen doped graphene quantum dot
  • Method for preparing tin powder modified high-stability nitrogen doped graphene quantum dot

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Embodiment 1

[0025] (1) Using a one-step hydrothermal method, citric acid (CA) as a carbon source, urea (Ur) as a nitrogen source, and a polytetrafluoroethylene high-temperature reaction liner as a reaction vessel. Weigh 1.68g of citric acid (CA) and 5.04g of urea (Ur) and mix them in 1.6ml of deionized water, stir to make the mixture uniform, then add 0.42g of reducing agent tin (Sn) powder, and stir uniformly. Put the mixed solution into an ultrasonic cleaner, perform ultrasonic dispersion treatment for 30 minutes, then transfer it to a reactor in a polytetrafluoroethylene high-temperature reaction liner, seal it, and heat it in an oven to 180°C for 8 hours, and then cool to room temperature with the furnace .

[0026] (2) Post-treatment of the hydrothermal product: the orange-yellow stable liquid obtained in step (1) is repeatedly washed with ethanol, ultrasonicated for 20 minutes, and then left to stand for 24 hours to further remove other excess organic matter. After the extraction is co...

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Abstract

The invention relates to a method for preparing tin powder modified high-stability nitrogen doped graphene quantum dots. The method comprises the following steps: by taking citric acid as a carbon source, urea as a nitrogen source and tin powder as a reducing agent, carrying out ultrasonic pretreatment and a hydrothermal reaction, and finally treating the hydrothermal product, thereby obtaining anitrogen-doped graphene quantum dot material. The method is simple in process and mild in condition, and the prepared nitrogen doped graphene quantum dots are high in purity, small in particle size and uniform in size distribution, has fluorescence stability for half a year or longer, and has application potential in multiple fields such as photoelectricity and biological medicines.

Description

Technical field [0001] The invention relates to the technical field of nano materials, in particular to a method for preparing high-stability nitrogen-doped graphene quantum dots modified by tin powder. Background technique [0002] In recent years, graphene quantum dots have been developed as the latest member of the graphene family. They are favored due to their good water solubility, biocompatibility, low toxicity, and stable fluorescence; and because they are inheriting graphene The excellent performance also has quantum confinement effect and boundary effect, which greatly opens up the application prospects of graphene quantum dots in the fields of energy, environment and biosensing. [0003] The preparation of graphene quantum dots is an important topic in the research field of graphene nanomaterials, and the choice of preparation method has an important influence on the performance of graphene quantum dots, such as the size of the crystal grains, the morphology of the crysta...

Claims

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Application Information

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IPC IPC(8): C01B32/184B82Y30/00C09K11/65
CPCC09K11/65B82Y30/00C01B32/184C01P2002/80C01P2002/85C01P2004/04C01B2204/30C01P2004/64
Inventor 赵皓玥谢华澄王焱陆冠宏
Owner JIANGSU ANNATAI ENVIRONMENTAL PROTECTION TECH CO LTD