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Process for preparing nanometer cobalt oxide

A technology of nano-cobalt oxide and cobalt oxide, applied in nanostructure manufacturing, cobalt oxide/cobalt hydroxide, nanotechnology, etc., can solve the problems of reagent types or steps, inconvenient operation and actual production, etc., and achieve simple and easy operation of equipment , to achieve the effect of controllable preparation and cheap raw materials

Inactive Publication Date: 2007-05-16
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these techniques require many types of reagents or steps, which are not convenient for operation and actual production.

Method used

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  • Process for preparing nanometer cobalt oxide
  • Process for preparing nanometer cobalt oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Take 0.50gCo(CH 3 COO) 2 4H 2 O was dissolved in 20ml of water, 2.5ml of 25% concentrated ammonia water was added thereto, stirred and refluxed at 70°C for 3 hours, a certain amount of air was retained in the upper part of the solution during the reflux reaction, the resulting suspension was centrifuged, washed several times with distilled water, Cobalt oxide nanoparticles with an average particle diameter of about 15 nm can be obtained by medium drying.

Embodiment 2

[0036] Take 0.56gCoSO 4 7H 2 O was dissolved in 20ml of water, 2.5ml of 25% concentrated ammonia water was added thereto, stirred evenly in the air, transferred to a closed reaction kettle, a certain amount of air was kept in the upper part of the solution, reacted at 100°C for 3 hours, and the resulting suspension was centrifuged, Washing with distilled water for several times and drying in air can obtain cobalt oxide nanoparticles with an average particle diameter of about 20 nm.

Embodiment 3

[0038] Take 0.50gCo(CH 3 COO) 2 4H 2 O was dissolved in 20ml of water, 2.5ml of 25% concentrated ammonia water was added thereto, stirred evenly in the air, transferred to a closed reaction kettle, a certain amount of air was kept in the upper part of the solution, reacted at 200°C for 8 hours, and the resulting suspension was centrifuged, Washing with distilled water for several times and drying in the air can obtain cobalt oxide nanocubic crystals with an average particle diameter of about 25 nm.

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Abstract

The invention discloses a preparing method of nanometer cobalt oxide, which comprises the following steps: (1) dissolving bivalent soluble salt in the water or alcohol or composite solvent of water and alcohol; obtaining the solution with bivalent cobalt ion; (2) adding certain quantity of ammonia in the bivalent cobalt ion solution; blending evenly; refluxing and heating in the reactor; or transmitting into autoclave to do close heat; (3) separating sediment; washing; drying; obtaining nanometer material of black cobalt oxide with different size or shape; realizing controllable equipment of nanometer cobalt oxide within certain scale.

Description

technical field [0001] The invention belongs to the field of inorganic preparation chemistry and inorganic non-metallic materials, and relates to a preparation method of nanometer cobalt oxide. Background technique [0002] Cobalt oxide (Co 3 o 4 ) as a transition metal oxide has a wide range of uses and can be used as a catalyst, magnetic material, electrode material, gas sensing material, field emission material, etc., and has attracted widespread attention. Nanomaterials refer to materials with at least one dimension between 1-100nm in the three-dimensional scale. Because of their small size and large specific surface area, they have shown excellent performance in many aspects. Since the 1980s, It has aroused widespread concern all over the world and has become a hot spot in material science research. [0003] The preparation of nano-cobalt oxide, as the premise of its properties research and practical application, has important scientific significance and application ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04B82B3/00
Inventor 张爱民董玉明尹琳殷英何坤
Owner NANJING UNIV
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