Preparation method and application of graphene quantum dot stable gold nanoparticles

A technology of graphene quantum dots and gold nanoparticles, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, water/sludge/sewage treatment, etc., can solve the problem that chloroauric acid is expensive, High production cost, environmental pollution and other problems, to achieve the effect of short synthesis time, fast speed and high purity

Inactive Publication Date: 2019-05-03
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chloroauric acid, the raw material for the synthesis of gold nanoparticles, is expensive and is consumed in large quantities in organic reactions, resulting in environmental pollution and high production costs

Method used

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  • Preparation method and application of graphene quantum dot stable gold nanoparticles
  • Preparation method and application of graphene quantum dot stable gold nanoparticles
  • Preparation method and application of graphene quantum dot stable gold nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation scheme that the present invention adopts comprises the following steps

[0027] Step 1: Take 20mg of soluble starch, add 60mL of deionized water to a 50mL round bottom flask, stir and dissolve in an oil bath at 80°C, pour it into a reaction kettle, and put it in an oven at 150°C for 8 hours;

[0028] Step 2: Take 1 mL of the graphene quantum dot solution in Step 1, add 3 mL of deionized water, and stir until uniform;

[0029] Step 3: Place the 2.5×10 -4 Add 1 mL of deionized water to 1 mmol of chloroauric acid tetrahydrate to form a solution;

[0030] Step 4: Add the solution obtained in step 3 to the solution in step 2, stir until uniform, and react for 0.5-2.0 hours;

[0031] Step 5: Store at 3-5° C. after the reaction is completed, and the gold nanoparticle catalyst stabilized by graphene quantum dots can be prepared.

[0032] figure 1 It is a transmission electron microscope scanning atlas of the novel catalyst prepared by the present invention, ...

Embodiment 2

[0034] The preparation scheme that the present invention adopts comprises the following steps

[0035] Step 1: Take 40mg of soluble starch, add 80mL of deionized water to a 50mL round bottom flask, stir and dissolve in an oil bath at 80°C, pour it into a reaction kettle, and put it in an oven at 180°C for 8 hours;

[0036] Step 2: Take 1 mL of the graphene quantum dot solution in Step 1, add 3 mL of deionized water, and stir until uniform;

[0037] Step 3: Place the 5×10 -3 Add 1 mL of deionized water to 1 mmol of chloroauric acid tetrahydrate to form a solution;

[0038] Step 4: Add the solution obtained in step 3 to the solution in step 2, stir until uniform, and react for 0.5-2.0 hours;

[0039] Step 5: Store at 3-5° C. after the reaction is completed, and the gold nanoparticle catalyst stabilized by graphene quantum dots can be prepared.

Embodiment 3

[0041] Application of the novel graphene quantum dot-stabilized gold nanoparticle catalyst obtained in Example 1 of the present invention in catalytic degradation of p-nitrophenol and sodium borohydride reaction.

[0042] Including the following steps:

[0043]

[0044] Step 1: Dissolve p-nitrophenol in deionized water, sonicate until dissolved, and configure the concentration to be 2.5×10 - 4 mmol / ml solution;

[0045] Step 2: NaBH 4 Dissolve in deionized water to make a concentration of 2.5×10 -2 mmol / ml solution;

[0046] Step 3: Take 1mL of p-nitrophenol solution in step 1 in a cuvette, add NaBH in step 2 4 Solution 1ml, mix well.

[0047] Step 4: Add the gold nanoparticle catalyst stabilized by graphene quantum dots into the reaction system, measure the peak shape of the ultraviolet-visible light absorption spectrum of p-nitrophenol with an ultraviolet-visible light photometer, and the reaction can be completed within 0.5-2 hours.

[0048] Figure 4 It is the u...

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Abstract

The invention provides a preparation method of a novel gold nanoparticle catalyst. The synthetic method only uses graphene quantum dots and chloroauric acid as raw materials without adding any other reducing agent and stabilizing agent, a mixing reaction is performed in deionized water, and therefore the graphene quantum dot-supported gold nanoparticles can be obtained. According to the preparation method provided by the invention, the gold nanoparticles prepared by the method have good water dispersibility and stability, uniform particle size distribution and good catalytic activity, and canrapidly degrade p-nitrophenol in industrial wastewater; the process synthesis method adopted in the invention is simple, green, and high-efficiency; and discovery and research of the preparation method of the catalyst facilitate further broadening a research field of metal nanoparticle materials, and provide some novel ideas for design and synthesis of a novel metal nano catalyst.

Description

technical field [0001] The invention relates to a preparation method and application of a novel gold nanoparticle catalyst, belonging to the field of functional materials. Background technique [0002] Gold nanoparticles, with high electron density, dielectric properties and catalytic effect, can combine with a variety of biological macromolecules without affecting their biological activity; graphene quantum dots exhibit low biological toxicity, excellent water solubility, chemical inertness, Stable photoluminescence, good surface modification and other characteristics. Graphene quantum dots stabilized gold nanoparticles prepared by compounding graphene quantum dots with chloroauric acid in a simple and green method have good water solubility, stable chemical, electrochemical and photochemical properties, excellent catalytic activity, and a wide pH range of application It has been widely used in organic catalytic reactions. Chloroauric acid, the raw material for the synthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52C02F1/32C02F1/30C02F101/38
Inventor 刘湘申佳露陈卫丰李宁黄煜刘根江
Owner CHINA THREE GORGES UNIV
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