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Method for preparing monodisperse nickel nanoparticle

A nickel nanoparticle, monodisperse technology, which is applied in the field of preparation of monodisperse nickel nanoparticle, can solve the problems of difficulty in controlling particle size distribution and crystal phase, easy oxidation of nanoparticles, high cost, etc., and achieves short preparation cycle and low cost , a wide range of effects

Inactive Publication Date: 2010-10-13
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

South Korea's Park J. et al. (Adv.Mater., 2005, 17: 429) successfully prepared monodisperse, non-agglomerated nickel nanoparticles using a high-temperature liquid phase reduction method, but this method uses expensive alkylphosphines As a solvent, and the nanoparticles are easily oxidized, only a single crystal phase can be obtained
[0003] In summary, although many preparation methods of nickel nanoparticles have been reported at home and abroad, these methods are difficult to control the particle size distribution and crystal phase while controlling the particle size.

Method used

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  • Method for preparing monodisperse nickel nanoparticle
  • Method for preparing monodisperse nickel nanoparticle
  • Method for preparing monodisperse nickel nanoparticle

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Experimental program
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Embodiment 1fc

[0029] The preparation of embodiment 1fcc phase 4 nanometer monodisperse nickel nanoparticles

[0030] Mix 0.26g of nickel acetylacetonate with 6ml of oleylamine, 1ml of trioctylamine and 1.38ml of trioctylphosphine under the protection of argon, stir for 20min, raise to 130°C and keep it for 20min, then quickly rise to 205°C, keep it for 30min, It was then cooled to room temperature, centrifuged and washed several times with a mixture of ethanol and hexane, and finally vacuum-dried to obtain a black powder. figure 1 It is a transmission electron microscope photo of the product, its appearance is spherical, the particle size distribution is narrow, and the average particle size is about 4nm. figure 2 It is the X-ray powder diffraction pattern of the product, and its diffraction peaks are consistent with the fcc nickel phase.

Embodiment 2f

[0031] The preparation of embodiment 2fcc phase 9.3 nanometer monodisperse nickel nanoparticles

[0032]Mix 0.26g of nickel acetylacetonate with 7ml of oleylamine, 0.66mL of trioctylphosphine and 0.15mL of oleic acid under the protection of argon, stir for 20min, raise to 130°C and keep for 20min, then rapidly rise to 215°C, keep for 30min, It was then cooled to room temperature, centrifuged and washed several times with a mixture of ethanol and hexane, and finally vacuum-dried to obtain a black powder. image 3 It is a transmission electron microscope photo of the product, the average particle size of the nanoparticles is about 9.3nm, they are spherical, and the particle size distribution is narrow. Figure 4 It is the X-ray powder diffraction pattern of the product, and its diffraction peaks are consistent with the fcc nickel phase.

Embodiment 3f

[0033] The preparation of embodiment 3 fcc phase 11.3 nanometer monodisperse nickel nanoparticles

[0034] Mix 0.25g of nickel acetate tetrahydrate with 7ml of oleylamine, 1ml of dodecylamine and 0.8ml of trioctylphosphine under the protection of argon, stir for 20min, then rise to 150°C and vacuum for 40min, then pass argon for 20min, then Rapidly rise to 240°C, keep warm for 30min, cool to room temperature, centrifuge and wash several times with ethanol and hexane mixture, and finally vacuum dry to obtain a black powder. Figure 5 It can be seen from the transmission electron microscope photo that the nanoparticles are spherical, the particle size distribution is narrow, and the average particle size is about 11.3nm. Figure 6 It is the X-ray powder diffraction pattern of the product, and its diffraction peaks are consistent with the fcc nickel phase. The hysteresis line of the product at room temperature is shown in Figure 15 , consistent with the hysteresis loop of ferr...

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Abstract

The invention discloses a method for preparing a monodispersed nickel nanoparticles, and relates to nickel nanoparticles. The invention provides a method for preparing monodispersed nickel nanoparticles which have common ferromagnetic property as well as high performance, monodispersion, insusceptibility to oxidizationm, non-agglomeration, nonferromagnetic property and other characteristics and expand application range of nickel nanoparticles. Under protection of inert gases, an organic metal salt of nickel, alkylamine, a surface stabilizer and an organic solvent are mixed, stirred, kept at 106 to 160 DEG C and then heated to 180 to 350 DEG C. Reaction products are collected, washed by using the organic solvent, centrifuged and subjected to vacuum drying to obtain monodispersed nickel nanoparticles. The method is simple in process, short in preparation period, rich in raw material resources and relatively low in cost and can prepare nickel nanoparticles which can be used as high-performance catalysts, magnetic materials, welding materials, electrode materials and so on.

Description

technical field [0001] The invention relates to a nickel nanoparticle, in particular to a preparation method of a monodisperse nickel nanoparticle. Background technique [0002] The preparation technology of nanoparticles is a key link in the research, development and application of nanomaterials. Nickel is an important magnetic transition group metal. Nickel nanoparticles are widely used in many fields such as magnetism, electricity, catalysis, medicine and biology. Several methods for preparing nickel nanoparticles have been developed in recent years. One of the most important preparation methods is the wet chemical reduction of metal compounds. Compared with the general physical preparation method, this method has the advantages of relatively low cost, relatively simple technical route and easy realization of scale-up production. This method has been widely used in the preparation of noble metals (gold, platinum and palladium, etc.), but due to nickel The electronegat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 陈远志彭栋梁罗晓华佘厚德岳光辉
Owner XIAMEN UNIV