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Nanoparticle with single crystal shell and Au@Ni3S2 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. The properties of chemical properties, physical and chemical properties, the operation process are simple and easy, and the size uniformity is good.

Active Publication Date: 2019-07-19
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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  • Nanoparticle with single crystal shell and Au@Ni3S2 core-shell structure, and preparation method thereof
  • Nanoparticle with single crystal shell and Au@Ni3S2 core-shell structure, and preparation method thereof
  • Nanoparticle with single crystal shell and Au@Ni3S2 core-shell structure, and preparation method thereof

Examples

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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: Cool the first reaction solution prepared in Step 3 to room temperature, and centrifuge for 5 minutes to 10 minutes at a centrifugal speed of 9000 rpm to 12000 rpm to obtain the first product; ...

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: Cool the first reaction solution prepared in Step 3 to room temperature, and centrifuge for 5 minutes to 10 minutes at a centrifugal speed of 9000 rpm to 12000 rpm to obtain the first product;

[0072] Ste...

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: Cool the first reaction solution prepared in Step 3 to room temperature, and centrifuge for 5 minutes to 10 minutes at a centrifugal speed of 9000 rpm to 12000 rpm to obtain the first product;

[...

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Abstract

The invention discloses a nanoparticle with a single crystal shell and an Au@Ni3S2 core-shell structure. The nanoparticle is formed by a face-centered cubic-phase Au core and a rhombus-phase Ni3S2 shell, wherein the Ni3S2 shell is of a single crystal structure. A preparation method of the nanoparticle is a seed growth method which is characterized by adopting a pre-synthesized Au nanoparticle as aseed, adding 1-dodecanethiol, and epitaxially growing generated Ni3S2 along the Au nanoparticle so as to form the Au@Ni3S2 core-shell structure. The method provides the way of simply and effectivelypreparing the novel nanometer material with the single crystal semiconductor shell and the metal-semiconductor core-shell structure, and is simple in operation, and the product homogeneity is good; and the obtained Au@Ni3S2 core-shell structure has good stability and physicochemical property, has an excellent hydrogen evolution catalytic performance so as to provide a favorable basis for the application of the Au@Ni3S2 core-shell structure in high-efficiency electrolyzed water, and can be widely applied to the fields such as catalysts and supercapacitors.

Description

technical field [0001] The invention relates to metal-sulfide composite nanomaterials, in particular to 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 exi...

Claims

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Application Information

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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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