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Au/NiSx eggshell-structured nanoparticles and preparation method thereof

A nanoparticle and eggshell technology, which is applied in the field of Au/NiSx eggshell structure nanoparticles and its preparation, can solve the problems of complex process system, cumbersome steps, harsh conditions, etc., and achieves overcoming the complex process system and simple operation process. Easy, mild response effect

Active Publication Date: 2019-07-19
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide Au / NiS x A method for preparing eggshell nanoparticles, which overcomes the shortcomings of the prior art, such as complex process systems, cumbersome steps, and relatively harsh conditions

Method used

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  • Au/NiSx eggshell-structured nanoparticles and preparation method thereof
  • Au/NiSx eggshell-structured nanoparticles and preparation method thereof
  • Au/NiSx eggshell-structured nanoparticles and preparation method thereof

Examples

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Effect test

Embodiment 1

[0043] The present invention prepares Au / NiS x The method for the nanoparticle of eggshell structure, preferably, the method comprises the following steps:

[0044] Step 1: Take 16ml of oleylamine and heat up to 100°C;

[0045] 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 containing Au nanoparticles;

[0046] Step 3: Add 0.3 g of nickel acetylacetonate to the oleylamine solution in Step 2, stir until dissolved, heat up to 230° C., and react for 120 minutes.

[0047] Step 4: Add 0.78ml of 1-dodecanethiol to the oleylamine solution in Step 3, and keep the temperature of the solution at 230°C for 180 minutes to prepare the first reaction solution;

[0048] Step 5: After cooling the first reaction solution prepared in Step 4 to room temperature, centrifuge at a rotational sp...

Embodiment 2

[0072] The present invention prepares Au / NiS xThe method for the nanoparticle of eggshell structure, preferably, the method comprises the following steps:

[0073] Step 1: Take 16ml of oleylamine and heat up to 100°C;

[0074] 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 containing Au nanoparticles;

[0075] Step 3: Add 0.3 g of nickel acetylacetonate to the oleylamine solution in Step 2, stir until dissolved, heat up to 230° C., and react for 120 minutes.

[0076] Step 4: Add 0.78ml of 1-dodecanethiol to the oleylamine solution in Step 3, and keep the temperature of the solution at 250°C for 180 minutes to prepare the first reaction solution;

[0077] Step 5: After cooling the first reaction solution prepared in Step 4 to room temperature, centrifuge at a rotational spe...

Embodiment 3

[0082] The present invention prepares Au / NiS x The method for the nanoparticle of eggshell structure, preferably, the method comprises the following steps:

[0083] Step 1: Take 16ml of oleylamine and heat up to 100°C;

[0084] 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 containing Au nanoparticles;

[0085] Step 3: Add 0.3 g of nickel acetylacetonate to the oleylamine solution in Step 2, stir until dissolved, heat up to 230° C., and react for 120 minutes.

[0086] Step 4: Add 0.78ml of 1-dodecanethiol to the oleylamine solution in Step 3, and keep the temperature of the solution at 230°C for 180 minutes to prepare the first reaction solution;

[0087] Step 5: After cooling the first reaction solution prepared in Step 4 to room temperature, centrifuge at a rotational speed of...

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Abstract

The invention discloses Au / NiSx eggshell-structured nanoparticles, and belongs to the field of nanomaterials. The nanoparticles are composed of cubic phase Au cores and diamond phase Ni3S2 or cubic phase Ni3S4 shell layers. A preparation method of the nanoparticles is an in-situ conversion method, a pre-synthesized Au-Ni dimer structure is used as a precursor, 1-dodecanethiol is added, and the Au-Ni dimer structure is transformed into an Au / NiSx eggshell structure in situ. According to the preparation method of the nanoparticles, a simple and effective way for preparing novel precious metal-transition metal sulfide eggshell-structured nanomaterials, and operation is easy; and the obtained Au / NiSx eggshell-structured nanoparticles are provided with single crystal shell layers, the excellenthydrogen evolution catalytic performance of the Au / NiSx eggshell-structured nanoparticles provides a good foundation on application of the Au / NiSx eggshell-structured nanoparticles in high-efficiencyelectrolytic water, the Au / NiSx eggshell-structured nanoparticles can be widely used the fields such as catalysts and super capacitors.

Description

technical field [0001] The invention belongs to the field of nanomaterials and relates to noble metal-transition metal sulfide composite nanomaterials, in particular to an Au / NiS x Eggshell-structured nanoparticles and methods for their preparation. Background technique [0002] Nanomaterials research is currently 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, it is an important direction of current research to design and prepare the microstructure and components of composite structure particles based on nanomaterials at the nanometer and atomic scales. [0003] Noble metal-t...

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 段嗣斌吕月鹏王荣明
Owner UNIV OF SCI & TECH BEIJING
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