Method for preparing nanometer-level cube-like cobaltosic oxide

A technology for cobalt tetroxide and cubes, which is applied in the field of preparing nano-scale cubic cobalt tetroxide, can solve the problems of complex synthesis process, difficulty in reaching nanometer scale, and difficulty in controlling particle morphology, and achieves simple preparation process, low price, and easy realization of large-scale preparation. Effect

Inactive Publication Date: 2013-04-03
NANJING UNIV OF TECH
View PDF4 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional hydrothermal synthesis method can realize the industrial synthesis of cobalt tetroxide particles, it has disadvantages such as complex synthesis process, low metal recovery rate, and the need

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
  • Method for preparing nanometer-level cube-like cobaltosic oxide
  • Method for preparing nanometer-level cube-like cobaltosic oxide
  • Method for preparing nanometer-level cube-like cobaltosic oxide

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1:

[0030] Disperse 0.3 g of dimethylglyoxime in 30 ml of absolute ethanol, and adjust the pH value of the dimethylglyoxime solution to 13.0 with 0.5M sodium hydroxide ethanol solution. 0.3 g of nickel chloride hexahydrate was dissolved in 1 liter of water, and the diacetyl oxime solution was added dropwise to the nickel chloride solution under ultrasonic conditions to obtain a red flocculent substance. The red flocculent product was suction filtered, washed, dried, and then calcined at 500°C for 1 h in an Ar atmosphere to obtain black powder. After etching away the nickel oxide and nickel in the black powder with 2.0mol / L hydrochloric acid, a nanostructured porous carbon is obtained. The scanning electron microscope picture is as follows figure 1 Shown:

Example Embodiment

[0031] Example 2:

[0032] 0.3mg porous carbon was added to 40ml of distilled water for ultrasonic dispersion, then 28.0mg of cobalt nitrate and 36.0mg of urea were added, stirred well and transferred to a 60ml hydrothermal reactor, reacted at 120°C for 12 hours, and naturally cooled to room temperature After centrifugation and washing, nanometer cubic cobalt tetroxide powder is obtained. The scanning electron microscope and transmission electron microscope photos are as follows figure 2 Shown:

Example Embodiment

[0033] Example 3:

[0034] In the absence of porous carbon, add 28.0mg of cobalt nitrate and 36.0mg of urea to 40ml of distilled water, stir well and transfer to a 60ml hydrothermal reactor, react at 120°C for 12 hours, cool to room temperature naturally, and centrifuge After separation and washing, irregularly shaped cobalt tetroxide powder is obtained. The scanning electron microscope photograph is as follows image 3 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 nanometer-level cube-like cobaltosic oxide. The method comprises the following synthetic steps in sequence: dispersing a certain amount of porous carbons into deionized water; ultrasonically dispersing; transferring into a reacting kettle containing the mixed solution of cobalt salt, urea and deionized water; fully stirring and mixing; placing the reacting kettle into an oven; carrying out hydrothermal reaction for a certain time; naturally cooling to reach the room temperature; and centrifugally separating and washing the reaction product by water at a plurality of times, thus obtaining the cube-like cobaltosic oxide powder in a one-step hydrothermal synthesis way. The cube-like cobaltosic oxide powder can be roasted at a high temperature in the air, thus obtaining the porous nanometer-level cube-like cobaltosic oxide. Compared with the conventional synthetic technique, the cobaltosic oxide synthesized by the method disclosed by the invention has the advantages that the porous nanometer-level cube-like structure is provided, the shape and the appearance can be controlled, the dimension is uniformly distributed, the specific surface area is large, the synthesizing process is simple, the repeatability is high, and high characteristics are shown in the field of supercapacitors.

Description

technical field [0001] The invention relates to a method for preparing nano-scale cubic cobalt tetroxide by hydrothermal synthesis. Background technique [0002] Nanomaterials refer to the general term for granular materials with at least one dimension in the three-dimensional space in the nanoscale range (1-100 nanometers) or composed of substances in this scale range as basic units. The unique functions and effects of nanoparticles make nanomaterials not only of great significance in scientific development, but also have good application prospects in practical applications. As an excellent catalyst and battery cathode material, cobalt trioxide nanomaterials have been widely used in photocatalysis, biosensing, supercapacitors, etc. [0003] Hydrothermal synthesis is the main method for preparing cobalt tetroxide. In recent years, uniform precipitation method, solid salt pyrolysis method, sol-gel method, solution heat method, solution atomization oxidation method, non-hydro...

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
IPC IPC(8): C01G51/04B82Y30/00B82Y40/00
Inventor 董晓臣黄维刘湘梅龙庆
Owner NANJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap