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Preparation method of cobalt nanosphere

A cobalt nanometer and cobalt chloride hexahydrate technology, which is applied in the field of preparation of cobalt nanospheres, can solve the problems of difficult control of product size and shape, harsh high-temperature reaction conditions, and complicated preparation process, and achieve simple equipment, low cost, Simple operation effect

Active Publication Date: 2013-12-18
烟台力量知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have deficiencies to a certain extent, such as difficult to control product size and shape;

Method used

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  • Preparation method of cobalt nanosphere

Examples

Experimental program
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Embodiment 1

[0028] The preparation method of the cobalt nanospheres of this embodiment comprises the following steps:

[0029] 1) Weigh 0.25 g of cobalt chloride hexahydrate and 0.05 g of polyvinylpyrrolidone and dissolve it in a mixture of 15 ml of deionized water and absolute ethanol to make solution A; weigh 0.4 g of sodium hydroxide and dissolve it in 5 ml of deionized Make solution B in water; then weigh 0.4 g sodium borohydride and dissolve in 5 ml deionized water to make solution C;

[0030] 2) Mix 15 ml of solution A, 5 ml of solution B and 5 ml of solution C as a reaction solution, transfer it to an autoclave, and place it in a constant temperature blast drying oven at 160 °C for 20 hours to obtain cobalt nanospheres;

[0031] 3) After the hydrothermal reaction, centrifuge the suspended reaction solution, and then wash the precipitate with deionized water and absolute ethanol;

[0032] 4) Dry the precipitate in a vacuum drying oven at 50 °C for 5 hours to obtain black cobalt pow...

Embodiment 2

[0035] The preparation method of the cobalt nanospheres of this embodiment comprises the following steps:

[0036] 1) Weigh 0.25 g of cobalt chloride hexahydrate and 0.06 g of polyvinylpyrrolidone and dissolve it in a mixture of 15 ml of deionized water and absolute ethanol to make solution A; weigh 0.5 g of sodium hydroxide and dissolve it in 5 ml of deionized Water to make solution B; then weigh 0.62 g sodium borohydride and dissolve it in 5 ml deionized water to make solution C;

[0037] 2) 15 ml of solution A, 5 ml of solution B and 5 ml of solution C were mixed as a reaction solution and transferred to an autoclave, and placed in a constant temperature blast drying oven at 180 °C for 15 hours to obtain cobalt nanospheres;

[0038] 3) After the hydrothermal reaction, centrifuge the suspended reaction solution, and then wash the precipitate with deionized water and absolute ethanol;

[0039] 4) Dry the precipitate in a vacuum drying oven at 50 °C for 5 hours to obtain blac...

Embodiment 3

[0042] The preparation method of the cobalt nanospheres of this embodiment comprises the following steps:

[0043] 1) Weigh 0.25 g of cobalt chloride hexahydrate and 0.1 g of polyvinylpyrrolidone dissolved in a mixture of 15 ml of deionized water and absolute ethanol to make solution A; weigh 0.48 g of sodium hydroxide and dissolve in 5 ml of deionized Water to make solution B; then weigh 0.55 g sodium borohydride and dissolve it in 5 ml deionized water to make solution C;

[0044] 2) Mix 15 ml of solution A, 5 ml of solution B and 5 ml of solution C as a reaction solution, transfer it to an autoclave, and place it in a constant temperature blast drying oven at 180 °C for 18 hours to obtain cobalt nanospheres;

[0045] 3) After the hydrothermal reaction, centrifuge the suspended reaction solution, and then wash the precipitate with deionized water and absolute ethanol;

[0046] 4) Dry the precipitate in a vacuum drying oven at 40 °C for 6 hours to obtain black cobalt powder. ...

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Abstract

The invention discloses a preparation method of a cobalt nanosphere. The preparation method comprises the following steps: 1) preparing a solution A by dissolving cobalt chloride hexahydrate and a surfactant in mixed liquor of deionized water and absolute ethyl alcohol; preparing a solution B by dissolving sodium hydroxide in deionized water; preparing a solution C by dissolving sodium borohydride in deionized water; 2) mixing the solution A, the solution B with the solution C to be a reaction solution, and transferring the reaction solution to a high pressure autoclave, and performing a hydrothermal reaction to obtain the cobalt nanosphere, wherein through controlling the reaction conditions, the diameter of the cobalt nanosphere can be controlled within 250-900 nm. The preparation method has the characteristics of easiness in obtaining of raw material, simple equipment, low cost, simplicity in operation, high efficiency, quickness and the like. The prepared cobalt nanosphere has the advantages of normalized shape, uniform grain diameter, good dispersibility, controllable size, high productivity, good stability, and suitability for large-scale industrial production. The cobalt nanometer material can be widely applied to the fields of magnetic recording material, magnetic fluid, permanent magnets, wave-absorbing material, hard alloy, catalytic material, ceramics, solar cells and the like.

Description

Technical field [0001] The present invention is the field of nano -material preparation technology, and it involves a method of preparing a cobalt nanoles. Background technique [0002] Due to the surface effect, volume effect, quantum size effect, and macro quantum tunnel effects due to surface effects, volume effects, and macro -quantum tunnel effects, they have strange electrical, magnetic, optical properties, etc.Get a wide range of applications.Metal cobalt -nanow powder is an important transitional metal nanoma material, which can be used as high -performance magnetic recording materials, magnetic flows, suction materials, activated sintering additives, etc., which are widely used in hard alloys, catalytic materials, permanent magnets, ceramicsWith solar batteries and other fields, it has received widespread attention and has become a hot spot for research. [0003] At present, there are many preparation methods for cobalt nan powder materials, such as chemical precipitatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 吴会杰李庆张进唐英
Owner 烟台力量知识产权服务有限公司
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