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

Solvothermal preparation method of cobalt nano-fibers

A cobalt nano and solvothermal technology, applied in nanotechnology and other directions, can solve the problems of poor flexibility and uneven diameter, and achieve the effects of good flexibility, low cost and simple process

Active Publication Date: 2013-02-27
DALIAN UNIV OF TECH
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a solvothermal preparation method of cobalt nanofibers, which overcomes the defects of poor flexibility and uneven diameter in the existing cobalt nanofiber preparation methods

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
  • Solvothermal preparation method of cobalt nano-fibers
  • Solvothermal preparation method of cobalt nano-fibers
  • Solvothermal preparation method of cobalt nano-fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Preparation of reaction solution

[0023] Prepare the precursor solution with ethylene glycol as the solvent, and the concentration of each reactant is as follows:

[0024]

[0025] 2. Preparation of cobalt nanofibers

[0026] Move the above solution into the reaction kettle with a filling degree of 50%, tighten the lid of the reaction kettle, place it in a heating furnace, heat it to 180°C, and keep it warm for 36 hours. After the reaction kettle is completely cooled, open it and centrifuge the resulting black precipitate. After separation, it was washed three times with absolute ethanol, and then dried at 50°C for 24 hours. The SEM photo of the resulting product is as figure 1 As shown, the TEM photographs are as figure 2 shown.

Embodiment 2

[0028] 1. Preparation of reaction solution

[0029] Prepare the precursor solution with ethylene glycol as the solvent, and the concentration of each reactant is as follows:

[0030]

[0031] 2. Preparation of cobalt nanofibers

[0032] Move the above solution into the reaction kettle with a filling degree of 70%. Tighten the lid of the reaction kettle and place it in a heating furnace to heat to 190°C and keep it warm for 24 hours. After the reaction kettle is completely cooled, open it and centrifuge the resulting black precipitate. After separation, it was washed three times with absolute ethanol, and then dried at 50°C for 24 hours. The SEM picture of the resulting product is as image 3 As shown, the X-ray diffraction spectrum is shown as Figure 4 shown.

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 sizeaaaaaaaaaa
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a solvothermal preparation method of cobalt nano-fibers, which belongs to the technical field of metal materials. The solvothermal preparation method is characterized by adopting a solvothermal method, taking glycol as a solvent and ethidene diamine as a reducing agent and reducing cobalt salt to the cobalt nano-fibers with the help of surfactants including polyvinylpyrrolidone and polyethylene glycol monooleyl ether. The generated cobalt nano-fibers are subjected to centrifugal separation, washed twice or three times by absolute ethyl alcohol, dried and collected. The cobalt nano-fibers range from fifty to one hundred nanometers in diameter and ten to dozens of micrometers in length, the length-diameter ratio of the cobalt nano-fibers is very large, and the cobalt nano-fibers grow in a bundle form. The solvothermal preparation method has the effects and benefits that under the combined action of the two surfactants and the ethidene diamine, reduced cobalt grows linearly in a direction (001) to form the cobalt nano-fibers with even diameters and good flexibility; and the solvothermal preparation method has the advantages of simple process and low cost.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a solvothermal preparation method of cobalt nanofibers. Background technique [0002] Cobalt nanomaterials have unique photoelectromagnetic and catalytic properties, and have broad application prospects in single-electron devices, ultra-high-density information storage, magnetic fluids, catalysts, and biological anticancer drugs. One-dimensional cobalt nanofibers have unique quantum transport effects, super mechanical strength, high luminous efficiency and remarkable thermoelectric effect, and are one of the research hotspots in the field of nanomaterials. The preparation of cobalt nanofibers with uniform diameter and good flexibility is the basis for its practical application. [0003] According to the report of "Rare Metal Materials and Engineering" 2012, 41 (9): 1527~1530, using cobalt oxalate nanorods as a precursor, nanometer metal cobalt fibers can be p...

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 Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 齐民董旭峰刘俊鹏赵红
Owner DALIAN UNIV OF TECH
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