Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of chemical preparation method of spherical porous hollow nano cobalt powder

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

Inactive Publication Date: 2017-02-01
UNIV OF SCI & TECH BEIJING
View PDF4 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of chemical preparation method of spherical porous hollow nano cobalt powder
  • A kind of chemical preparation method of spherical porous hollow nano cobalt powder
  • A kind of chemical preparation method of spherical porous hollow nano 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 the reaction is complete;

[0053]...

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 reaction is complete;

[0079] 3...

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) Centrifuge the solution and the cobalt-iron ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

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 wi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com