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Chemical method for preparing spherical porous hollow nanometer cobalt powder

A technology of hollow nano and cobalt powder, which is applied in the direction of nanotechnology, can solve the problems of high equipment cost and uneven size distribution of nanoparticles, and achieve the effects of uniform distribution, low preparation cost and mild reaction conditions

Inactive Publication Date: 2015-05-13
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires high equipment cost, and the size distribution of the prepared nanoparticles is not uniform

Method used

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  • Chemical method for preparing spherical porous hollow nanometer cobalt powder
  • Chemical method for preparing spherical porous hollow nanometer cobalt powder
  • Chemical method for preparing spherical porous hollow nanometer cobalt powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Preparation of the reaction solution:

[0034] 1) Preparation of metal salt solution:

[0035] Use ethylene glycol as solvent to prepare solutions in the following proportions.

[0036] Co(NO 3 ) 2 0.04 mol / L

[0037] Fe (NO 3 ) 3 0.01mol / L

[0038] temperature 25°C

[0039] CTAB 0.70g / L

[0040] Stirring time 20 min

[0041] 2) Preparation of reducing agent solution:

[0042] Use ethylene glycol as solvent to prepare solutions in the following proportions.

[0043] KOH 1.00mol / L

[0044] Hydrazine hydrate 16.00mL

[0045] KBH 4 0.67g / L

[0046] temperature 25°C

[0047] Stirring time 20 min

[0048] 3) Preparation of acid solution:

[0049] HCl 0.02mol / L

[0050] 2. Preparation of porous hollow cobalt nanoparticles:

[0051] 1) Heat the solutions prepared by the above method to 80 °C respectively;

[0052] 2) Add the reducing agent solution dropwise into the metal salt solution and react for 20 minutes until th...

Embodiment 2

[0059] 1. Preparation of the reaction solution:

[0060] 1) Preparation of metal salt solution:

[0061] Use ethylene glycol as solvent to prepare solutions in the following proportions.

[0062] CoSO 4 0.08mol / L

[0063] FeSO 4 0.01mol / L

[0064] temperature 25°C

[0065] PVP K30 0.70g / L

[0066] Stirring time 25 minutes

[0067] 2) Preparation of reducing agent solution:

[0068] Use ethylene glycol as solvent to prepare solutions in the following proportions.

[0069] KOH 0.20 mol / L

[0070] Hydrazine hydrate 16.00mL

[0071] KBH 4 0.67g / L

[0072] temperature 25°C

[0073] Stirring time 25 minutes

[0074] 3) Preparation of acid solution:

[0075] HCl 0.03mol / L

[0076] 2. Preparation of porous hollow cobalt nanoparticles:

[0077] 1) Heat the solutions prepared by the above method to 85 °C respectively;

[0078] 2) Add the reducing agent solution dropwise into the metal salt solution and react for 20 minutes until the...

Embodiment 3

[0085] 1. Preparation of the reaction solution:

[0086] 1) Preparation of metal salt solution:

[0087] Prepare solutions in the following ratios using water as solvent.

[0088] CoCl 2 0.04 mol / L

[0089] FeCl 2 0.01mol / L

[0090] temperature 20°C

[0091] SDS 0.7g / L

[0092] Stirring time 30 min

[0093] 2) Preparation of reducing agent solution:

[0094] Prepare solutions in the following ratios using water as solvent.

[0095] KOH 0.20 mol / L

[0096] Hydrazine hydrate 2.00mL

[0097] KBH 4 0.67g / L

[0098] temperature 20°C

[0099] Stirring time 30 min

[0100] 3) Preparation of acid solution:

[0101] HCl 0.05mol / L

[0102] 2. Preparation of porous hollow cobalt nanoparticles:

[0103] 1) Heat the solutions prepared by the above method to 90 °C respectively;

[0104] 2) Add the reducing agent solution dropwise into the metal salt solution and react for 20 minutes until the reaction is complete;

[0105] 3) Ce...

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Abstract

The invention provides a chemical method for preparing spherical porous hollow nanometer cobalt powder and relates to the chemical method for preparing nanometer cobalt powder materials. According to the chemical method, hydrazine hydrate and potassium borohydride are used as reducing agents to restore metallic cobalt and iron ions to metallic cobalt and iron atoms in specific solvent, metal atoms re-associate and grow up, and ferrocobaltnano-alloy particles are obtained finally. Then de-alloying for the prepared spherical ferrocobaltnano-alloy particles is conducted in acid solutions or acid mist with certain concentration to remove iron elements, and the spherical porous hollow nanometer cobalt powder particles are prepared out. The chemical method for preparing the spherical porous hollow nanometer cobalt powder is simple in technology, low in raw material cost and convenient to operate; in addition, by means of the chemical method, the spherical porous hollow nanometer particle powder can be prepared out at normal temperature and pressure and conditions are provided for practical application of the nanometer cobalt powder.

Description

technical field [0001] The invention relates to the preparation of nanometer powder materials by chemical methods, in particular to the preparation of porous hollow nanometer cobalt (Co) powder. Background technique [0002] In recent years, the synthesis of nanostructured materials with specialized morphologies has attracted increasing interest due to the importance of morphology and structure in determining material properties. For example, many physical and chemical properties such as adsorption performance, adhesion performance, acoustic performance, photoelectric performance, heat transfer performance and catalytic activity of materials are closely related to the morphology of materials. Nano-scale and micro-scale porous hollow spheres have a special pore structure, and compared with bulk materials, they have many characteristics such as larger specific surface area, lower density, and special mechanical properties. Due to its special pore structure, metal particles ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
Inventor 俞宏英孙冬柏刘世英孟惠民
Owner UNIV OF SCI & TECH BEIJING
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