A single crystal shell of au@ni 3 the s 2 Nanoparticles with core-shell structure and preparation method thereof

A nanoparticle, core-shell structure technology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve problems such as poor single crystallinity of the shell layer and complex process system, and achieve good stability. Properties and physical and chemical properties, simple and easy operation process, mild reaction effect

Active Publication Date: 2020-06-05
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another object of the present invention is to provide Au@Ni with a single crystal shell 3 S 2 A method for preparing core-shell nanoparticles, which overcomes the shortcomings of the prior art, such as complex process systems and poor single crystallinity of the shell layer

Method used

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  • A single crystal shell of au@ni <sub>3</sub> the s <sub>2</sub> Nanoparticles with core-shell structure and preparation method thereof
  • A single crystal shell of au@ni <sub>3</sub> the s <sub>2</sub> Nanoparticles with core-shell structure and preparation method thereof
  • A single crystal shell of au@ni <sub>3</sub> the s <sub>2</sub> Nanoparticles with core-shell structure and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0039] The present invention prepares Au@Ni 3 S 2 A method for nanoparticles of a core-shell structure, the method comprising the following steps:

[0040] Step 1: Add 0.3g nickel acetylacetonate into 16ml oleylamine, heat up to 100°C, mix and stir until dissolved;

[0041] Step 2: Add the toluene solution of chloroauric acid (dissolve 0.03g of chloroauric acid in 3ml of toluene) into the oleylamine solution of step 1, feed argon gas (flow rate 30ml / min), and react at 100°C for 60min, namely Obtain an oleylamine solution of nickel acetylacetonate containing Au nanoparticles;

[0042] Step 3: Warm up the oleylamine solution in Step 2 to 180°C, add 0.78ml of 1-dodecanethiol, keep the solution temperature at 180°C for 120 minutes to prepare the first reaction solution;

[0043] Step 4: After cooling the first reaction solution prepared in Step 3 to room temperature, centrifuge at a rotational speed of 9000 rpm to 12000 rpm for 5 min to 10 min to obtain the first product;

[0...

Embodiment 2

[0067] The present invention prepares Au@Ni 3 S 2 A method for nanoparticles of a core-shell structure, the method comprising the following steps:

[0068] Step 1: Add 0.3g nickel acetylacetonate into 16ml oleylamine, heat up to 100°C, mix and stir until dissolved;

[0069] Step 2: Add the toluene solution of chloroauric acid (dissolve 0.05g chloroauric acid in 5ml toluene) into the oleylamine solution in step 1, feed argon gas (flow rate 30ml / min), and react at 100°C for 60min, namely Obtain an oleylamine solution of nickel acetylacetonate containing Au nanoparticles;

[0070] Step 3: Warm up the oleylamine solution in Step 2 to 180°C, add 0.78ml of 1-dodecanethiol, keep the solution temperature at 180°C for 180min to prepare the first reaction solution;

[0071] Step 4: After cooling the first reaction solution prepared in Step 3 to room temperature, centrifuge at a rotational speed of 9000 rpm to 12000 rpm for 5 min to 10 min to obtain the first product;

[0072] Step 5: ...

Embodiment 3

[0076] The present invention prepares Au@Ni 3 S 2 A method for nanoparticles of a core-shell structure, the method comprising the following steps:

[0077] Step 1: Add 0.5g nickel acetylacetonate into 20ml oleylamine, heat up to 100°C, mix and stir until dissolved;

[0078] Step 2: Add the toluene solution of chloroauric acid (dissolve 0.03g of chloroauric acid in 3ml of toluene) into the oleylamine solution of step 1, feed argon gas (flow rate 30ml / min), and react at 100°C for 60min, namely Obtain an oleylamine solution of nickel acetylacetonate containing Au nanoparticles;

[0079] Step 3: Warm up the oleylamine solution in Step 2 to 180°C, add 1ml of 1-dodecanethiol, keep the solution temperature at 180°C for 120 minutes to prepare the first reaction solution;

[0080] Step 4: After cooling the first reaction solution prepared in Step 3 to room temperature, centrifuge at a rotational speed of 9000 rpm to 12000 rpm for 5 min to 10 min to obtain the first product;

[0081...

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Abstract

The invention discloses an Au@Ni with a single crystal shell 3 S 2 Core-shell structure nanoparticles, the nanoparticles are face-centered cubic phase Au core and rhombohedral phase Ni 3 S 2 shell constitutes, the Ni 3 S 2 The shell is a single crystal structure. The preparation method of the nanoparticles is a seed growth method, using the Au nanoparticles synthesized in advance as seeds, adding 1-dodecanethiol to generate Ni 3 S 2 Epitaxial growth along Au nanoparticles to form Au@Ni 3 S 2 Core-shell structure. This method provides a simple and effective way to prepare a novel metal-semiconductor core-shell structure nanomaterial with a single crystal semiconductor shell, with simple operation and good product uniformity; the obtained Au@Ni 3 S 2 The core-shell nanostructure has good stability and physical and chemical properties, and its excellent hydrogen evolution catalytic performance provides a good foundation for its application in high-efficiency electrolysis of water, and can be widely used in catalysts, supercapacitors and other fields.

Description

technical field [0001] The invention relates to metal-sulfide composite nanomaterials, in particular to an Au@Ni with a single crystal shell 3 S 2 Nanoparticles with a core-shell structure and a method for preparing the same. Background technique [0002] In recent years, the study of nanomaterials has been a hot spot in scientific research. Nanomaterials, compared with their bulk materials, have more abundant and excellent physical and chemical properties due to small size effects, surface effects, etc. There are very important application prospects in these fields. However, with the advancement of science and technology, it is difficult for single-component nanomaterials to meet the actual needs of multi-functionality and intelligence. Therefore, designing and preparing the microstructure and components of nanomaterial-based composite structure particles at the nanometer and atomic scales is an important direction of current nanomaterial research. [0003] Due to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B22F1/0553B22F1/07B22F1/145B22F1/054
Inventor 王荣明吕月鹏段嗣斌
Owner UNIV OF SCI & TECH BEIJING
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