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Method for preparing metallic nickel nano-wire

A nickel nanowire and nanowire technology, which is applied in the field of chemical preparation of metal nickel nanowires, can solve the problems of complex preparation process, few products, complicated experimental equipment, etc., and achieve the effects of low preparation cost, short cycle and simple process.

Inactive Publication Date: 2009-01-14
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: the preparatory process is complicated, the experimental device is complicated, especially the amount of the product is very small, it is impossible to prepare a large amount
"Magnetic nanochains of metal formed by assembly of small nanoparticles" (Magnetic nanochains of metal formed by assembly of small nanoparticles) published by Liu Chengming and others in "Chemical communications" (Chemical Communications) 2004, page 2726 to 2727, in which it is proposed to use soft The template method to prepare nickel nanochains has the disadvantages that the preparation of the reaction solution is complicated and the controllability of the product morphology is poor.

Method used

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  • Method for preparing metallic nickel nano-wire
  • Method for preparing metallic nickel nano-wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation of reaction precursor solution:

[0032] Prepare a solution in the following proportions with a mixed solution of water and ethanol at a mass ratio of 1:1.

[0033] NiSO 4 0.006mol / L

[0034] NaOH 1mol / L

[0035] Add 85% (w / w) aqueous solution of hydrazine hydrate to the prepared solution at a volume ratio of 1:0.6, stir and react at room temperature, and the reaction time is 5 minutes;

[0036] 2. Preparation of nickel nanowires:

[0037] ① Place the reaction precursor solution prepared by the above method in an external uniform magnetic field of 0.37T;

[0038] ② Heating to 50°C;

[0039] ③React for 30 minutes until the reaction is complete;

[0040] ④ Separate the solution and nickel nanowires with a magnetic field;

[0041] ⑤ Wash the nickel nanowires twice with deionized water, and then wash the nickel nanowires twice with absolute ethanol or acetone;

[0042] ⑥ dry collection.

[0043] Nickel nanopowder with an average length of 69 μm, ...

Embodiment 2

[0045] 1. Preparation of reaction precursor solution:

[0046] Prepare a solution in the following proportions with a mixed solution of water and ethanol at a mass ratio of 1:0.

[0047] Ni(CH 3 COO) 2 0.006mol / L

[0048] NaOH 0.1mol / L

[0049] Add 85% (w / w) aqueous solution of hydrazine hydrate to the prepared solution at a volume ratio of 1:0.6, stir and react at room temperature, and the reaction time is 10 minutes;

[0050] 2. Preparation of nickel nanowires:

[0051] ① Place the reaction precursor solution prepared by the above method in an applied uniform magnetic field of 0.52T;

[0052] ② Heating to 85°C;

[0053] ③React for 60 minutes until the reaction is complete;

[0054] ④ Separate the solution and nickel nanowires with a magnetic field;

[0055] ⑤ Wash the nickel nanowires twice with deionized water, and then wash the nickel nanowires twice with absolute ethanol or acetone;

[0056] ⑥ dry collection.

[0057] Nickel nanowires with an average length ...

Embodiment 3

[0059] 1. Preparation of reaction precursor solution:

[0060] Prepare a solution in the following proportions with a mixed solution of water and ethanol at a mass ratio of 1:1.

[0061] Ni(NO 3 ) 2 0.006mol / L

[0062] NaOH 1mol / L

[0063] Add 85% (w / w) aqueous solution of hydrazine hydrate to the prepared solution at a volume ratio of 1:0.4, stir and react at room temperature, and the reaction time is 7 minutes;

[0064] 2. Preparation of nickel nanowires:

[0065] ① Place the reaction precursor solution prepared by the above method in an applied uniform magnetic field of 0.52T;

[0066] ② Heating to 60°C;

[0067] ③React for 15 minutes until the reaction is complete;

[0068] ④ Separate the solution and nickel nanowires with a magnetic field;

[0069] ⑤ Wash the nickel nanowires with deionized water for 3 times, and then wash the nickel nanowires with absolute ethanol or acetone for 3 times;

[0070]⑥ dry collection.

[0071] Nickel nanowires with an average l...

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Abstract

The invention discloses a chemical preparation method of nickel nano-wire which belongs to the field of the nanometer technology. The invention utilizes the mixed solution of water and ethanol to prepare the nickel ion solution which reacts with sodium hydroxide solution to generate nickel hydroxide precipitation, then utilizes hydrazine hydrate to dissolve precipitation and reduces the nickel ion under the heating condition and in the applied uniform magnetic field, finally the nickel nano-wire is assembled. Compared with the prior art, using the invention can prepare the nickel nano-wire which is 217 to 1900 nanometer in diameter, 15 to 69 micrometer in length, 20 to 300 in length-diameter ratio and has the composition of pure nickel. The invention has the advantages that the beforehand preparation process of formwork is not required, the chemical process is simple, the preparation cycle is short, the preparation cost is low and the mass preparation can be realized.

Description

technical field [0001] The invention relates to a preparation method in the technical field of nanometer materials, in particular to a chemical preparation method of metal nickel nanowires. Background technique [0002] The grain size, morphology, surface state and microstructure of nano-metal materials directly affect the properties and uses of nano-metals. For example, nano-nickel with a particle size of 15nm has superparamagnetic properties, while nano-nickel with a particle size of 85nm has a high coercive force. At present, the construction of various nanostructures puts forward higher requirements on the morphology, structure and size of nanoparticles as building blocks. The research on the shape-controlled synthesis and application of nano-metals is still in its infancy. The preparation of nano-metal materials with controllable structure and the reassembly of nano-molecular structures are current and future research hotspots. my country has abundant nickel resources...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 张亚非雅典波罗魏良明刘萍张丽英
Owner SHANGHAI JIAO TONG UNIV
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