Preparation method of micrometer grade spherical cobaltosic oxide material

A micron-level technology of cobalt tetroxide, applied in the field of micro-nano materials, can solve the problems of cumbersome pollen pretreatment process and low product sphericity, and achieve the effect of high sphericity, high purity and high dispersion

Active Publication Date: 2019-03-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method uses pollen with abundant sources and low price as a template agent, the pretreatment process for pollen is cumbersome, and the obtained product has a low degree of sphericity.

Method used

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  • Preparation method of micrometer grade spherical cobaltosic oxide material
  • Preparation method of micrometer grade spherical cobaltosic oxide material
  • Preparation method of micrometer grade spherical cobaltosic oxide material

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Dissolve 25mmol cobalt sulfate heptahydrate, 5g PEG-200 and 20ml n-propanol in 100ml deionized water to form solution A; pour solution A into a 100ml agglomerated tetrafluoroethylene-lined reactor with a filling degree of 70%, Place it in an oven at 180°C for 10 hours. After the reaction, the product obtained is washed, filtered, dried overnight at 70°C in a vacuum, and then calcined at 500°C for 2 hours to obtain micron-sized spherical cobalt tetroxide, denoted as S-1.

Embodiment 2

[0033]Dissolve 400mmol cobalt nitrate hexahydrate, 35g PEG-200 and 80ml n-dodecanol in 100ml deionized water to form solution A; pour solution A into a 100ml agglomerated tetrafluoroethylene-lined reactor, fill temperature of 70%, placed in an oven at 220°C to react for 20h, the product obtained after the reaction was washed, filtered, dried overnight at 50°C in vacuum, and then calcined at 400°C for 3h to obtain micron-sized spherical cobalt tetroxide, denoted as S-2 .

Embodiment 3

[0035] Dissolve 5mmol cobalt acetate tetrahydrate, 0.5g PEG-10000 and 5ml decanol in 100ml deionized water to form solution A; pour solution A into a 100ml agglomerated polytetrafluoroethylene-lined reactor with a filling degree of 70% , placed in an oven at 150°C for 12 hours, the product obtained after the reaction was washed, filtered, dried overnight at 90°C in vacuum, and then calcined at 300°C for 5 hours to obtain micron-sized spherical cobalt tetroxide, denoted as S-3.

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Abstract

The invention relates to a preparation method of a micrometer grade spherical cobaltosic oxide material. The preparation method comprises following steps: 1, a cobalt salt, polyethylene glycol (PEG),and an alcohol are dissolved in deionized water so as to obtain a uniform solution A; 2, the solution A is introduced into a reaction vessel for hydro-thermal reaction, and washing, drying, and roasting are carried out so as to obtain the micrometer grade spherical cobaltosic oxide material. The preparation method is simple in operation; the raw materials are easily available; product purity, thespherical degree, and the dispersion degree are high; and the preparation method is suitable for industrialized large scale production.

Description

technical field [0001] The invention belongs to the technical field of micro-nano materials, in particular to a preparation method of a micron-scale spherical cobalt trioxide material. Background technique [0002] Cobalt tetroxide is an important class of P-type semiconductor materials, which are widely used in pressure-sensitive ceramics, chemical sensors, lithium-ion electromagnetics, supercapacitors, photocatalysis, and heterogeneous catalysis. There are many preparation methods, such as uniform precipitation method, solid phase reaction method, mechanical ball milling method, wet precipitation-calcination method, hydrothermal method and so on. Due to the special properties of cobalt tetroxide materials with different morphological structures, such as crystal plane effect, size effect, quantum effect, etc., scholars are no longer satisfied with the preparation of pure phase cobalt tetroxide materials, but turn their focus to the research of cobalt tetroxide form Precise...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04
CPCC01G51/04C01P2002/72C01P2004/03C01P2004/61
Inventor 王胜王树东陈志萍陈雅图
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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