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

Batch preparation method of nanometer cadmium hydroxide or nanometer cadmium oxide

A technology for cadmium hydroxide and cadmium oxide, which is applied in chemical instruments and methods, nanotechnology, inorganic chemistry, etc., can solve the problems of inability to batch prepare nano-cadmium hydroxide, uneven particle size distribution of nano-cadmium oxide, and complicated preparation process. , to achieve the effect of simple preparation process, uniform particle size and high activity

Inactive Publication Date: 2019-10-22
NANJING UNIV OF SCI & TECH
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nano cadmium oxide powder prepared by the invention has high purity, simple preparation method and low cost, but because the sample cannot be uniformly stressed during grinding, the particle size distribution of the obtained nano cadmium oxide is not uniform
In summary, the above preparation methods can be used to obtain nano-cadmium hydroxide and nano-cadmium oxide, but there are also some shortcomings, such as complex preparation process, the use of organic solvents, and the inability to prepare nano-cadmium hydroxide or nano-cadmium oxide in batches.

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
  • Batch preparation method of nanometer cadmium hydroxide or nanometer cadmium oxide
  • Batch preparation method of nanometer cadmium hydroxide or nanometer cadmium oxide
  • Batch preparation method of nanometer cadmium hydroxide or nanometer cadmium oxide

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of nano cadmium hydroxide or nano cadmium oxide of the present invention, concrete steps are as follows:

[0026] The first step is to weigh 1-20kg of industrial product CdO, and configure a dispersion liquid. The mass ratio of water and ethanol in the dispersion liquid is water: ethanol is 9:1-1:1, and the mass ratio of CdO in the CdO slurry is 5-1. 15%, add industrial product CdO into the dispersion liquid for stirring and dispersing;

[0027] In the second step, add the dispersion liquid into the grinder, adjust the speed of the grinder to 800~1500rpm, and the feed rate to 4~10kg / min, repeat the grinding of the material, and repeat this process to crush CdO. The chiller cools down the grinding cylinder, controls the temperature of the grinding material below 30°C, and the number of grinding times is more than 30;

[0028] In the third step, the obtained nano-Cd(OH) 2 Slurry, nano Cd(OH) at room temperature 2 The slurry is settled for 12~48h,...

Embodiment 1

[0032] In the first step, 10kg of industrial product CdO is weighed, and 100kg of dispersant is configured. The dispersant adopts a mixed liquid with a mass ratio of water and ethanol of 7:3, and the industrial product CdO is added to the dispersant for stirring and dispersing to obtain a CdO dispersion;

[0033] In the second step, add the dispersion into the grinder, adjust the speed of the grinder to 1300rpm, and the feed rate to 4kg / min, repeat the grinding of the material, repeat this process to grind CdO, and grind it through an industrial chiller during the grinding process Cool down the cylinder, control the temperature of the grinding material at 25°C, and grind 50 times;

[0034] In the third step, the obtained nano-Cd(OH) 2 Slurry, nano Cd(OH) at room temperature 2 The slurry was settled for 12 hours, and the supernatant liquid was removed;

[0035] In the fourth step, the concentrated nano Cd(OH) 2 Put the slurry into a vacuum freeze dryer, set the pre-freezing ...

Embodiment 2

[0038] In the first step, 10kg of industrial product CdO is weighed, and 60kg of dispersant is configured. The dispersant adopts a mixed liquid with a mass ratio of water and ethanol of 7:3, and the industrial product CdO is added to the dispersant for stirring and dispersing to obtain a CdO dispersion;

[0039] In the second step, add the dispersion into the grinder, adjust the speed of the grinder to 1300rpm, and the feed rate to 4kg / min, repeat the grinding of the material, repeat this process to grind CdO, and grind it through an industrial chiller during the grinding process Cool down the cylinder, control the temperature of the grinding material at 25°C, and grind 50 times;

[0040] In the third step, the obtained nano-Cd(OH) 2 Slurry, nano Cd(OH) at room temperature 2 The slurry was settled for 12 hours, and the supernatant liquid was removed;

[0041] In the fourth step, the concentrated nano Cd(OH) 2 Put the slurry into a vacuum freeze dryer, set the pre-freezing t...

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
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a batch preparation method of nanometer cadmium hydroxide or nanometer cadmium oxide. The method comprises the following steps: a CdO dispersion is placed in a ball mill, and undergoes cyclic wet grinding to obtain a Cd(OH)2 nano-slurry, the Cd(OH)2 nano-slurry is settled and concentrated, vacuum freeze-drying is performed to obtain nanometer Cd(OH)2, and the nanometer Cd(OH)2 is calcined to obtain nano-CdO; or CdO and water are reacted under the action of a high-energy mechanical field in the process of crushing the raw material CdO by a wet mechanical grinding processinto nano-particles in order to form nanometer Cd(OH)2, and vacuum freeze-drying is performed to obtain nanometer Cd(OH)2 with good dispersibility. The preparation method is simple and green, and canrealize batch production.

Description

technical field [0001] The invention relates to a batch preparation method of nano cadmium hydroxide or nano cadmium oxide, which belongs to the field of preparation of nano materials. Background technique [0002] Cadmium hydroxide (Cd(OH) 2 ) as a cathode additive can effectively enhance the discharge capacity of the nickel-cadmium battery and reduce the self-discharge of the electrode itself, prolong the service life of the battery and maintain high stability. At the same time, cadmium hydroxide is also an important precursor and an important transition product for the preparation of other cadmium-containing substances. Cadmium oxide (CdO) can be decomposed by high-temperature calcination of cadmium hydroxide. It belongs to a direct bandgap semiconductor with a bandgap width of 2.26eV. It is a photoelectric material with great application potential. Cadmium oxide, as the negative electrode active material of nickel-cadmium series alkaline rechargeable batteries, is the ...

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): C01G11/00B82Y40/00H01M4/48H01M10/30
CPCC01G11/00B82Y40/00H01M4/48H01M10/30C01P2004/64C01P2004/32Y02E60/10
Inventor 郝嘎子李豪姜炜肖磊胡玉冰
Owner NANJING UNIV OF SCI & 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