Preparation and separation method of monodisperse amorphous state nickel nano particle

A nanoparticle and amorphous nickel technology, which is applied in the field of preparation and separation of monodisperse amorphous nickel nanoparticles, can solve the problems of toxic nickel carbonyl, low decomposition temperature, and detachment of stabilizer molecules.

Active Publication Date: 2009-01-07
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
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  • Claims
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Problems solved by technology

There are following defects in the preparation method with nickel carbonyl as raw material: (1) nickel carbonyl is poisonous, and decomposition temperature is low, and storage and transportation are very inconven

Method used

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  • Preparation and separation method of monodisperse amorphous state nickel nano particle
  • Preparation and separation method of monodisperse amorphous state nickel nano particle
  • Preparation and separation method of monodisperse amorphous state nickel nano particle

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Embodiment Construction

[0021] The technical characteristics of the present invention will be described in detail below in conjunction with the embodiments.

[0022] In actual preparation, the method of the present invention is realized in the laboratory like this:

[0023] Put 2mmol nickel acetylacetonate, 6ml trioctylphosphine, 6ml oleylamine, 2mmol 1,2-hexadecanoyl alcohol, 1% organic iron (relative to the quality of nickel acetylacetonate), and 40ml liquid paraffin into a 100ml stainless steel autoclave In the reactor, high-purity nitrogen gas is introduced to remove oxygen. Pass hydrogen gas (purity 99.9%) into the autoclave, fill the pressure to 4.0MPa, adjust the stirring speed to 500rpm, then raise the temperature to 300°C, and react for 3 hours. After the reaction was completed, the reactor was opened, and the reaction solution was taken out and placed in a 250 ml beaker. Add 40 milliliters of ethanol and 10 milliliters of petroleum ether (60-90° C.) into the beaker, stir well and place it...

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Abstract

A method for preparing and separating monodisperse amorphous nickel nanoparticles comprises the following steps: taking acetylacetone nickel as a raw material; taking whiteruss as a reaction medium; taking trioctyl phosphine and oleylamine as stabilizing agents (or: protective solutes, surface modifying agents); taking an organic ferric compound as a catalyzer; taking polylol as a morphological modifying agent; mixing the above substances in a kettle-type reactor according to a certain ratio; heating the substances with hydrogen to the reaction temperature (150 to 350 DEG C); reacting for 3 hours; obtaining amorphous nickel nanoparticles; and adopting an external applied magnetic field to assist the solvent fractionating method, so as to separate the nickel nanoparticles from the reaction system. The powdery monodisperse amorphous nickel nanoparticles can once again disperse into organic solvents such as chloroform, sherwood oil, etc. without sedimentation.

Description

technical field [0001] The invention relates to a method for preparing and separating monodisperse amorphous nickel nanoparticles, which belongs to the improvement and innovation of the method for preparing and separating magnetic nanoscale materials. The monodisperse superparamagnetic amorphous nickel nanoparticles prepared by the method can be completely dissolved in polar and nonpolar organic solvents. Background technique [0002] Because amorphous nickel has high catalytic activity and magnetic properties at the same time, as a new generation of catalyst, the preparation and application of amorphous nickel has been paid more and more attention. Amorphous nano-nickel has higher catalytic activity and larger specific surface area than amorphous nickel bulk materials. At present, the methods for preparing ultrafine metal powder mainly include: grinding method, solid phase reaction method, vapor phase deposition method, aqueous solution electrolysis method, aqueous solutio...

Claims

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Application Information

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IPC IPC(8): B22F9/26
Inventor 张宏玉阙国和张永宁刘东邓文安沐宝泉金环年刘峰奎李庶峰文萍于建宁
Owner BC P INC CHINA NAT PETROLEUM CORP
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