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A method for preparing metal nanoparticles using graphene oxide as a template

A technology of metal nanoparticles and graphene, applied in chemical instruments and methods, nanotechnology, non-metallic elements, etc., can solve the problems of wide particle size distribution, agglomeration, large particle size, etc., and achieve the effect of simple preparation conditions

Active Publication Date: 2021-09-21
戚明海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at the problems of large particle size, wide particle size distribution and agglomeration in the preparation process of the above-mentioned metal nanoparticles, and uses graphene oxide as a preparation template to prepare metal nanoparticles with metal salts and reducing agents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Graphene oxide: 1g, trishydroxyaminomethane: 10g, mercaptopropionic acid: 10g, chloroauric acid: 0.1g, sodium citrate: 1g.

[0024] S1: Ultrasonic disperse graphene oxide in an appropriate amount of dimethylformamide solvent, then add trihydroxyaminomethane to react at room temperature for 4-8 hours, use nylon membrane to filter, wash the product, and dry to obtain the product, named Graphene-OH ;

[0025] S2: Ultrasonic disperse the Graphene-OH prepared in S1 in an appropriate amount of dimethylformamide solvent, then add an appropriate amount of p-phenylsulfonic acid catalyst with mercaptopropionic acid, and heat up to 90-100°C for React for 5-10 hours to carry out esterification reaction, use nylon membrane to filter, wash the product, and dry to obtain the product, and introduce mercapto groups into graphene oxide to prepare Graphene-SH.

[0026] S3: Ultrasonic disperse the Graphene-SH prepared in S2 in an appropriate amount of deionized water, then add a 0.1g / ml a...

Embodiment 2

[0029] Graphene oxide: 1g, trishydroxyaminomethane: 25g, mercaptopropionic acid: 20g, chloroauric acid: 0.5g, sodium citrate: 2g.

[0030] S1: Ultrasonic disperse graphene oxide in an appropriate amount of dimethylformamide solvent, then add trihydroxyaminomethane to react at room temperature for 4-8 hours, use nylon membrane to filter, wash the product, and dry to obtain the product, named Graphene-OH ;

[0031] S2: Ultrasonic disperse the Graphene-OH prepared in S1 in an appropriate amount of dimethylformamide solvent, then add an appropriate amount of p-phenylsulfonic acid catalyst with mercaptopropionic acid, and heat up to 90-100°C for React for 5-10 hours to carry out esterification reaction, use nylon membrane to filter, wash the product, and dry to obtain the product, and introduce mercapto groups into graphene oxide to prepare Graphene-SH.

[0032] S3: Ultrasonic disperse the Graphene-SH prepared in S2 in an appropriate amount of deionized water, then add a 0.1g / ml a...

Embodiment 3

[0035] Graphene oxide: 1g, trishydroxyaminomethane: 40g, mercaptopropionic acid: 30g, chloroauric acid: 1g, sodium citrate: 3g.

[0036] S1: Ultrasonic disperse graphene oxide in an appropriate amount of dimethylformamide solvent, then add trihydroxyaminomethane to react at room temperature for 4-8 hours, use nylon membrane to filter, wash the product, and dry to obtain the product, named Graphene-OH ;

[0037] S2: Ultrasonic disperse the Graphene-OH prepared in S1 in an appropriate amount of dimethylformamide solvent, then add an appropriate amount of p-phenylsulfonic acid catalyst with mercaptopropionic acid, and heat up to 90-100°C for React for 5-10 hours to carry out esterification reaction, use nylon membrane to filter, wash the product, and dry to obtain the product, and introduce mercapto groups into graphene oxide to prepare Graphene-SH.

[0038] S3: Ultrasonic disperse the Graphene-SH prepared in S2 in an appropriate amount of deionized water, then add a 0.1g / ml aqu...

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Abstract

The invention discloses a method for preparing metal nanoparticles. The preparation scheme of the invention is to react graphene oxide with trimethylolaminopropane to further increase the reaction sites of hydroxyl groups, and then carry out esterification with small molecules of mercapto groups with carboxyl groups. sulfhydryl group into graphene oxide, and then use the thiol-modified graphene oxide as a template to react with metal soluble salts and reducing agents to prepare metal nanoparticles with graphene oxide as a template, and the prepared metal nanoparticles The particle size is <30nm, and there is almost no agglomeration phenomenon, which makes it possible for these metal nanoparticles to be applied in the fields of molecular devices, chemical / biological sensors, catalysis, and optoelectronic materials.

Description

technical field [0001] The invention relates to a method for preparing metal nanoparticles, in particular to a method for preparing metal nanoparticles by using graphene oxide as a template. Background technique [0002] Metal nanoparticles have broad application prospects in many fields such as molecular devices, chemical / biological sensors, catalysis, and optoelectronic materials. The preparation of metal nanoparticles is generally based on the sol-gel method, that is, the metal salt of the reducing agent is used, and then sintered to obtain nanoparticles. The nanoparticles obtained by this method have a large particle size and a wide particle size distribution, and it is difficult to Solve the reunion problem. [0003] As an emerging carbon nanomaterial, graphene was first discovered in 2004. It is a honeycomb two-dimensional conjugated structure composed of a single layer of carbon atoms. It has a large specific surface area, unique chemical structure and unparalleled e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B82Y40/00C01B32/198
CPCB22F9/24B82Y40/00C01B32/198
Inventor 戚明海
Owner 戚明海