A preparation method and application of copper nanoparticles stabilized by graphene quantum dots

A technology of graphene quantum dots and copper nanoparticles, which is applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, and can solve problems such as the scarcity of metal nanoparticles

Active Publication Date: 2021-10-19
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] From the literature reports, the method of using graphene quantum dots to prepare stable metal nanoparticles is very rare, and the use of graphene quantum dots to stabilize copper nanoparticles to prepare this triazole has not been reported.

Method used

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  • A preparation method and application of copper nanoparticles stabilized by graphene quantum dots
  • A preparation method and application of copper nanoparticles stabilized by graphene quantum dots
  • A preparation method and application of copper nanoparticles stabilized by graphene quantum dots

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Step 1: Take 1ml of graphene quantum dot solution, add it to the reagent bottle, and stir for 5 minutes.

[0030] Step 2: Add 2ml of deionized water and stir for 5 minutes.

[0031] Step 3: add 1ml sodium borohydride solution, the amount of added sodium borohydride substance is 20 times of the amount of anhydrous copper sulfate substance added in step 3. The rate of addition is 1-5 minutes per milliliter.

[0032] Step 4: add 1ml anhydrous copper sulfate aqueous solution, the amount of added anhydrous copper sulfate substance is 2.5 * 10 -3 mmol, the dropping rate is 1-5 minutes per milliliter. Then stir for 2-3 hours. Graphene-stabilized copper nanoparticles were prepared. Take a sample to make a characteristic electron microscope scanning picture.

[0033] figure 2 It is a characteristic scanning electron microscope image of the graphene quantum dot-stabilized copper nanoparticles of Example 1. The material in the shape of a small black sphere in the figure is...

Embodiment 2

[0035] Step 1: Take 1ml of graphene quantum dot solution, add it to the reagent bottle, and stir for 5 minutes.

[0036] Step 2: Add 2ml of deionized water and stir for 5 minutes.

[0037] Step 3: add 1ml sodium borohydride solution, the amount of added sodium borohydride substance is 20 times of the amount of anhydrous copper sulfate substance added in step 3. The rate of addition is 1-5 minutes per milliliter.

[0038] Step 4: add 1ml anhydrous copper sulfate aqueous solution, the amount of added anhydrous copper sulfate substance is 2.5 * 10 -4 mmol, the dropping rate is 1-5 minutes per milliliter. Then stir for 2-3 hours. Graphene-stabilized copper nanoparticles were prepared. Samples were taken for scanning electron microscopy.

[0039] Figure 4 It is the scanning electron micrograph of the copper nanoparticle stabilized by the graphene quantum dot of embodiment 2. The substance in the shape of a small white sphere on the picture is a copper nanoparticle. This fi...

Embodiment 3

[0041] Step 1: Take 0.5mmol of phenylacetylene and 0.8mmol of benzyl azide into the test tube;

[0042] Step 2: Add the graphene quantum dot stabilized copper nanoparticles prepared in Example 1, add 2ml of deionized water,

[0043] Step 3: Immerse the test tube under water at 28-30°C, react for 26 hours, and stir evenly to prepare 1-benzyl-4-phenyl-1H-1,2,3-triazole, the reaction formula is as follows:

[0044]

[0045] The added graphene quantum dots stabilized copper nanoparticles have a mass of 1×10 -3 Millimoles.

[0046] Step 4: Purify the obtained 1-benzyl-4-phenyl-1H-1,2,3-triazole with a yield of 90.0% and a purity of 100.0% and take a sample for nuclear magnetic spectrum.

[0047] Figure 5 The 1H-NMR spectrum of the 1-benzyl-4-phenyl-1H-1,2,3-triazole prepared for the graphene quantum dot-stabilized copper nanoparticles of Example 3. This figure illustrates that the material obtained is actually 1-benzyl-4-phenyl-1H-1,2,3-triazole.

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Abstract

The invention provides a new method for preparing copper nanoparticles, belonging to the technical field of nano-synthesis methods, using graphene quantum dots to prepare copper nanoparticles, simple operation, mild reaction conditions, and the prepared copper nanoparticles are very stable , good monodispersity. In the present invention, the aqueous solution of the graphene quantum dots is firstly used, and the sodium borohydride aqueous solution and the anhydrous copper sulfate aqueous solution are added to prepare stable copper nanoparticles. The prepared copper nanoparticles are dispersed in a clear and transparent solution, the size of copper nanometers is between several nanometers and tens of nanometers, and the stability of the solution is very good. Preparation of regioselective 1,4‑disubstituted‑1,2,3‑triazoles using graphene quantum dot-stabilized copper nanoparticles as catalysts. The method is simple, green and safe, does not generate harmful substances, and conforms to the principles of environmental protection and green production.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial synthesis methods, and in particular relates to a preparation method of graphene quantum dot-stabilized copper nanoparticles and its application to prepare a triazole. Background technique [0002] Due to their unique properties, such as quantum size effect, surface effect, interface effect, volume effect, small size effect, macroscopic quantum tunneling effect, etc., nanoparticles have attracted extensive attention in the field of materials and catalysis. An important basis for the research and application of material properties. [0003] Graphene quantum dots are a new member of the graphene family. Compared with traditional graphene materials, graphene quantum dots are smaller in size and larger in specific surface area. In addition to the excellent properties of graphene, they also exhibit quantum confinement and boundary effects. A series of new properties have been discovered, which ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72C07D249/06B82Y30/00B82Y40/00
Inventor 刘湘李宁申佳露黄煜刘根江
Owner CHINA THREE GORGES UNIV
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