Preparation method of cobalt metal particles and cobalt oxide composite graphite nanosheet powder

A graphite nanosheet, cobalt oxide technology, applied in metal processing equipment, chemical instruments and methods, graphite and other directions, can solve the problems of complex process, non-compliance with environmental protection regulations, unfavorable large-scale production and application, etc., and achieve a simple preparation process. , No environmental pressure, easy to operate effect

Active Publication Date: 2020-02-25
HARBIN INST OF TECH AT WEIHAI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these composite powders use graphene oxide prepared by chemical methods as the carrier, and then undergo chemical reduction to realize the composite of graphene nanosheets and magnetic oxides; at this stage, the relevant processes are complicated, and the preparation by chemical methods often does not meet environmental protection regulations , not conducive to large-scale production applications

Method used

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  • Preparation method of cobalt metal particles and cobalt oxide composite graphite nanosheet powder
  • Preparation method of cobalt metal particles and cobalt oxide composite graphite nanosheet powder

Examples

Experimental program
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Effect test

Embodiment 1

[0016] A kind of preparation method of graphite nanosheet-cobalt-cobalt oxide composite powder, it is carried out as follows: first will contain oxidizing agent H 2 o 2 The aqueous solution is filled in a beaker, placed in a water bath, and the cobalt metal-composited graphene nanosheets are dispersed in the above aqueous solution for oxidation reaction, an oxide layer is formed on the surface of the cobalt-graphite nanosheet composite, and coated on the cobalt metal particles Surface layer; the reaction temperature is 50°C, 30min, take out and dry to prepare the composite powder of graphite nanosheet-cobalt-cobalt oxide, take out the powder, and dry it in a drying oven at 50°C for 2 hours to obtain the above composite sample ; Oxidant solution proportioning (mass percentage) is: 10% oxidant H 2 o 2 , 0.2% dispersant PVP (polyvinyl pyrrolidone (polyvinyl pyrrolidone) PVP for short), the remaining components are deionized water, the pH value of the solution is 4-6, and the pH...

Embodiment 2

[0018] The difference between the present embodiment and Example 1 is that the strong oxidizing agent in the same aqueous solution is perchloric acid (HClO 4 ), replacing the oxidizing agent H 2 o 2 , the dosage is 10% by mass, graphite nanosheet-cobalt-cobalt oxide composite powder is prepared by oxidation method, other steps and parameters are the same as in Example 1.

Embodiment 3

[0020] The difference between this embodiment and Example 1 is that potassium permanganate (KMnO 4 ) as an oxidizing agent, the dosage is 5% by mass, the graphite nanosheet-cobalt-cobalt oxide composite powder is prepared by the oxidation method, and the metal surface covering composite contains a certain amount of manganese element. Other steps and parameters are the same as in Example 1.

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Abstract

The invention relates to the technical field of preparation of graphite nanosheet composite magnetic particles, and concretely relates to a preparation method of a magnetic composite cobalt metal particle and cobalt oxide composite graphite nanosheet powder being particularly suitable for being used as a wave-absorbing material and having the sheet-core-shell microstructure of a cobalt oxide-cobalt-graphite nanosheet. Cobalt metal particle compounded graphite nanosheet composite powder is uniformly dispersed in an aqueous solution containing an oxidizing agent, stirring is performed for dispersion to ensure sufficient contact between the composite powder and the oxidizing solution in order to generate an oxidation coating layer on the surface of metallic cobalt, so the graphite nanosheet composite cobalt and cobalt oxide composite powder is obtained. The structure of the magnetic composite cobalt metal particle and cobalt oxide composite graphite nanosheet powder has the sheet-core-shell morphology, and the preparation method has the significant advantages of simple process, easiness in operation, no environmental protection pressure, and realization of large-scale mass production.

Description

Technical field: [0001] The invention relates to the technical field of preparation of graphite nanosheet composite magnetic particles, in particular to a magnetic cobalt metal particle and a cobalt metal particle having a sheet-core-shell microstructure of cobalt oxide-cobalt-graphite nanosheets which are particularly suitable for use as a wave-absorbing material. A method for preparing oxide composite graphite nanosheet powder. Background technique: [0002] With the accelerated innovation of military technology in the world, the trend of long-range precision, intelligence, stealth, and unmanned weapons and equipment is becoming more and more significant. Stealth performance has become a typical feature and an important capability of the new generation of weapons and equipment. In recent years, the wave-absorbing material technology represented by new carbon-based radar wave-absorbing composite materials such as graphene has become a key hotspot in the development of stea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04C01B32/21B22F9/24B22F1/02C09K3/00
CPCC01G51/04C01B32/21B22F9/24C09K3/00C01P2004/01B22F2009/245B22F1/16
Inventor 王春雨秦兆慧钟博张鹏
Owner HARBIN INST OF TECH AT WEIHAI
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