Method for preparing metallic nickel nano powder

A technology of nano-powder and metal nickel, which is applied in the field of nano-material preparation, can solve problems such as troublesome waste liquid treatment, unfavorable environmental protection, complicated equipment, etc., and achieve the effects of low production cost, uniform distribution, and simple preparation method

Inactive Publication Date: 2009-01-21
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these methods can obtain nano-nickel powder, the preparation of general process equipment by physical methods is complicated and energy consumption is high.
However, the preparation of nano-nickel powder by chemical methods is often reduced in the solution system, which requires a large amount of water to prepare the solution. Some chemical methods also use a large amount of organic matter, which is not conducive to environmental protection. These all bring great troubles to the treatment of waste liquid after industrial production.

Method used

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  • Method for preparing metallic nickel nano powder
  • Method for preparing metallic nickel nano powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] At 20°C, mix nickel sulfate and Tween 20 according to the mass ratio of 1:0.15, then grind them in a mortar for 10 minutes until they are evenly mixed, then add metal aluminum powder, the molar mass ratio of aluminum powder and nickel sulfate is 1 : 1. The mixture was ground until it reacted, followed by grinding for 30 minutes, and left to stand for 0.5 hour to obtain a mixture containing nano-nickel powder. The obtained mixture containing nano-nickel powder is washed twice with 2M sodium hydroxide and distilled water respectively, and centrifuged; the cleaned nano-nickel powder can be vacuum-dried at 40°C. The obtained metal nickel powder has an average particle diameter of 40 nm.

Embodiment 2

[0016] At 20°C, mix nickel chloride and Tween 20 according to the mass ratio of 1:0.15, then grind them in a mortar for 10 minutes until they are evenly mixed, then add metal aluminum powder, the molar mass ratio of aluminum powder and nickel chloride It is 1.5:1. The mixture was ground until reacted and then ground for 30 minutes to obtain a mixture containing nano-nickel powder. The obtained mixture containing nano-nickel powder is washed twice with 2M sodium hydroxide and distilled water respectively, and centrifuged; the cleaned nano-nickel powder can be vacuum-dried at 40°C. The obtained metal nickel powder has an average particle diameter of 30 nm.

Embodiment 3

[0018] At 20°C, mix nickel nitrate and Tween 20 according to the mass ratio of 1:0.10, then grind them in a mortar for 10 minutes until they are evenly mixed, then add metal aluminum powder, the molar mass ratio of aluminum powder and nickel nitrate is 1 : 1. The mixture was ground until it reacted, followed by grinding for 30 minutes, and left to stand for 0.5 hour to obtain a mixture containing nano-nickel powder. The obtained mixture containing nano-nickel powder is washed twice with 2M sodium hydroxide and distilled water respectively, and centrifuged; the cleaned nano-nickel powder can be vacuum-dried at 40°C. The obtained metal nickel powder has an average particle diameter of 60 nm.

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Abstract

The invention provides a preparation method for nickel nano-powder, which belongs to the technical field of the preparation of nano-materials. In the method, aluminum powder, which is more active than nickel, is mixed with inorganic nickel salt at the normal temperature and pressure, the inorganic nickel salt is ground together with a protective agent and then the mixture is put statically for a certain period of time, and nickel ions is replaced as the nickel nano-powder by the intermetallic replacement reaction. The preparation method used is a chemical reduction method, including the steps of reduction, washing, drying, etc. The preparation method is characterized by pure products, easy separation, difficult oxidation, etc. And the method is good for industrial production.

Description

Technical field: [0001] The invention belongs to the technical field of nanometer material preparation, and in particular relates to a method for preparing metallic nickel nanopowder by reduction of metallic aluminum powder. Background technique: [0002] Nano-nickel powder has unique physical and chemical properties compared with ordinary metal nickel powder, so it is widely used in catalysts, magnetic materials, electromagnetic shielding materials, conductive pastes, nano-coating materials, cemented carbide binders and military energy-containing materials. Materials and other aspects have broad application prospects. For example, it has been found that catalysts made of nano-nickel can increase the efficiency of hydrogenation and dehydrogenation reactions of organic matter by 10 times compared with traditional nickel catalysts; using nano-nickel powder as a rocket solid fuel catalyst can increase combustion efficiency by 100 times. The preparation of metal nickel nanopowd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 俞海云朱伟长郑翠红高兆武
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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