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

A method for preparing cobaltous oxide microspheres by solution method

A technology of cobalt oxide and microspheres, applied in the direction of cobalt oxide/cobalt hydroxide, etc., can solve the problems of cumbersome process, high cost, complicated process, etc., and achieve the effects of simple process, low energy consumption and low preparation temperature

Active Publication Date: 2019-10-11
ZHEJIANG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although cobaltous oxide with very pure phase composition can be obtained by these methods, the process of these methods is complicated and requires high temperature treatment in an inert atmosphere, so the cost of these methods is high and the process is cumbersome

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 method for preparing cobaltous oxide microspheres by solution method
  • A method for preparing cobaltous oxide microspheres by solution method
  • A method for preparing cobaltous oxide microspheres by solution method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 0.6g of cobalt acetate tetrahydrate and dissolve it in a mixed solution composed of 55mL of ethylene glycol and 5mL of deionized water, stir to make it fully mixed and dissolved, transfer the above solution to a reaction kettle with a volume of 100mL, and put the closed reaction kettle in Preheat the oven to 140°C in advance, and raise the temperature of the oven to 200°C at a rate of 2°C / min, and then keep it at 200°C for 8 hours; after the reaction is completed, the reaction kettle is cooled to room temperature, and the mixture is filtered , washing, and drying to obtain CoO microspheres. The XRD pattern of gained CoO microsphere is as figure 1 As shown, it can be seen from the figure that the product is pure face-centered cubic cobaltous oxide, and there are no other impurity diffraction peaks; the SEM microscopic appearance of CoO microspheres is as follows figure 2 shown.

Embodiment 2

[0019] Weigh 1.3g of cobalt acetate tetrahydrate and dissolve it in a mixed solution composed of 60mL of ethylene glycol and 6.6mL of deionized water, stir to make it fully mixed and dissolved, transfer the above solution to a reaction kettle with a volume of 90mL, and put the closed reaction kettle into In the oven preheated to 150°C in advance, and the oven was heated to 210°C at a rate of 5°C / min, and then kept at 210°C for 9 hours; after the reaction was completed, the reaction kettle was cooled to room temperature, and the mixture was passed through After filtering, washing and drying, CoO microspheres are obtained. The XRD pattern of gained CoO microsphere is as image 3 As shown, it can be seen from the figure that the product is cobaltous oxide of face-centered cubic and hexagonal crystal systems, without diffraction peaks of other impurities; the SEM morphology of the resulting CoO microspheres is as follows 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

No PUM Login to View More

Abstract

The invention discloses a method for preparing a cobalt oxide micro-sphere through a solution method. The method comprises the concrete steps of dissolving cobalt acetate tetrahydrate into a mixed liquid prepared from ethylene glycol and deionized water, transferring the solution into a high pressure reactor, putting the sealed reactor into a pre-heating drying box, gradually rising the temperature of the drying box to 200 DEG C to 210 DEG C according to the temperature rising speed of 2 to 5 DEG C / min, keeping warm at the temperature for 8 to 9 hours, cooling to room temperature after finishing reaction, and filtering, washing and drying the mixed liquid so as to obtain the cobalt oxide micro-sphere. The method for preparing the cobalt oxide micro-sphere through the solution method provided by the invention is simple in process, short in generation period, and low in cost, and meanwhile, the obtained product has high purity and a regular shape.

Description

technical field [0001] The invention relates to the field of preparation of nano functional materials, in particular to a method for preparing cobaltous oxide microspheres by a solution method. Background technique [0002] Cobaltous oxide is an important additive in nickel-cadmium secondary battery electrode materials, which can enhance electrical conductivity and reduce internal resistance. In addition, cobaltous oxide has important applications in many fields such as industrial catalysis, magnetic materials, semiconductor materials, dyes, and gas sensing. Therefore, cobaltous oxide is a widely used functional material. However, cobaltous oxide is a metastable cobalt oxide. Its chemical properties are relatively active, and it is easily oxidized to tricobalt tetroxide and easily reduced to metallic cobalt. Therefore, it is difficult to prepare an oxide with a very pure phase composition. sub-cobalt. [0003] The currently widely used method for preparing cobaltous oxide...

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): C01G51/04
Inventor 程继鹏马克远刘芙
Owner ZHEJIANG UNIV
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