Nano particle of Au/Ni12P5 nuclear shell structure and preparation method thereof

A nanoparticle, core-shell structure technology, applied in the field of metal-semiconductor composite nanomaterials, can solve the problems of demanding crystal structure, complex process and system, poor single crystallinity of the shell layer, etc., and achieve excellent capacitance performance and operation process Ease of operation and good size uniformity

Inactive Publication Date: 2014-12-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another object of the present invention is to provide Au / Ni with a single crystal shell 12 P 5 A method for preparing core-shell nanoparticles, which overcomes the deficiencies of the prior art, such as complex processes and systems, strict crystal structure requirements, and poor single crystallinity of the shell layer.

Method used

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  • Nano particle of Au/Ni12P5 nuclear shell structure and preparation method thereof
  • Nano particle of Au/Ni12P5 nuclear shell structure and preparation method thereof
  • Nano particle of Au/Ni12P5 nuclear shell structure and preparation method thereof

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Embodiment 1

[0045] The present invention synthesizes Au / Ni 12 P 5 The method for nanoparticles of core-shell structure, preferably, the method comprises the following steps:

[0046] Step 1: Add 0.5g nickel acetylacetonate into 10ml oleylamine, heat up to 100°C, mix and stir until dissolved;

[0047] Step 2: Add the toluene solution of chloroauric acid (0.05g of chloroauric acid dissolved in 5ml of toluene) to the oleylamine solution in step 1, feed nitrogen gas (flow rate 60ml / min), and react at 100°C for 60min to obtain Oleylamine solution of nickel acetylacetonate containing Au nanoparticles;

[0048] Step 3: heating the oleylamine solution in step 2 to 230° C. for 60 minutes, and using oleylamine to reduce nickel acetylacetonate to obtain Au-Ni dumbbell-structured nanoparticles;

[0049] Step 4: Keep the heating temperature constant, add 1 g of triphenylphosphine to the oleylamine solution obtained in Step 3 to obtain Au-Ni dumbbell structure nanoparticles, and stir until dissolved...

Embodiment 2

[0072] The comparison of embodiment 2 capacitance performance

[0073] The Au-Ni of the multimer structure prepared by comparative example 1 12 P 5 Composite nanoparticles and the Au / Ni synthesized in Example 1 12 P 5 Nanoparticles with core-shell structure and pure Ni 12P 5 Specific capacitance performance of nanoparticles under the same test conditions. The specific test conditions are: a three-electrode electrochemical cell measurement system is used; the Au / Ni 12 P 5 Mix the core-shell structure nanoparticles with activated carbon and polytetrafluoroethylene in a mass ratio of 7:2:1 and spread it to 1cm 2 The nickel mesh was dried under vacuum at 60°C as the working electrode; the Hg / HgO electrode and the nickel mesh were used as the reference electrode and the counter electrode respectively; 2mol / l potassium hydroxide aqueous solution was used as the electrolyte.

[0074] The result is as Figure 6 shown. Figure 6 Ni with different composition structures under ...

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Abstract

The invention discloses a nano particle of an Au / Ni12P5 nuclear shell structure. The nano particle is composed of a face-centered cubic phase Au shell and a body-centered tetragonal phase Ni12P5 shell layer, and the Ni12P5 shell layer is of a single-crystal structure. A preparation method of the nano particle is a method of in-situ transformation combined with recrystallization and comprises the steps that an Au-Ni dumbbell structure which is synthetized in advance is used as a precursor body, triphenylphosphine is added, and the Au-Ni dumbbell structure is converted into an Au-Ni12P5 nuclear shell structure in an in-situ mode. The method provides a way capable of effectively preparing a novel metal-semiconductor nuclear shell structure nano material with a single crystal semiconductor shell layer, operation is easy, and product homogeneity is good. The obtained nano particle of the Au / Ni12P5 nuclear shell structure has very good stability and physical physicochemical property, the excellent capacitive performance can provide a good foundation in application of electrochemistry energy storage devices with high energy density and high charge and discharge stability, and the nano particle can be widely applied to the fields of supercapacitors, catalysts and the like.

Description

technical field [0001] The invention relates to metal-semiconductor composite nanomaterials, in particular to an Au / Ni with a single crystal shell 12 P 5 Nanoparticles with a core-shell structure and a preparation method thereof. Background technique [0002] In recent years, the study of nanomaterials has been a hot spot in scientific research. Compared with their bulk materials, semiconductor nanomaterials have more abundant and excellent physical and chemical properties due to small size effects and surface effects. There are very important application prospects in the research field. However, with the advancement of science and technology, the performance of single-component semiconductor nanomaterials is also difficult to meet the actual needs of multi-functionality and intelligence. Therefore, designing and tailoring the microstructure and composition of multi-semiconductor-based composite structure particles at the nanometer and atomic scales is an important direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F9/24H01G11/30B82Y30/00B82Y40/00
CPCY02E60/13
Inventor 王荣明段嗣斌
Owner UNIV OF SCI & TECH BEIJING
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