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

Morphology controllable nanometer CeO2 preparation method

A nano and morphology technology, applied in the direction of nanotechnology, chemical instruments and methods, sustainable manufacturing/processing, etc., to achieve the effects of simplified production process, strong environmental protection and economic applicability, and reduced agglomeration

Inactive Publication Date: 2013-02-27
SHAANXI UNIV OF SCI & TECH
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although my country is rich in cerium resources, the preparation and application research of nano-cerium dioxide is still in the laboratory stage due to the lack of mature preparation methods and technologies, so the research on its synthesis and shape control is very necessary.

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
  • Morphology controllable nanometer CeO2 preparation method
  • Morphology controllable nanometer CeO2 preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) First, take 8.69g of cerium nitrate hexahydrate and 16.81g of citric acid and dissolve them in 100ml of deionized water to prepare cerium nitrate and citric acid solutions;

[0017] 2) Then slowly add the cerium nitrate solution into the citric acid solution under stirring, stir evenly at 65°C, add ammonia water dropwise, adjust the pH value to 2.0, then put it in a water bath and stir at 80°C until the reaction occurs Sol, put the formed sol into a drying oven and dry at 100°C to form a xerogel;

[0018] 3) The above-mentioned xerogel was fired in a muffle furnace from room temperature to 300°C at a heating rate of 3°C / min for 2 hours to obtain light yellow CeO 2 , Grind the roasted product with a mortar, and finally get a light yellow CeO 2 powder.

Embodiment 2

[0020] 1) First, take 8.69g of cerium nitrate hexahydrate and 16.81g of citric acid and dissolve them in 100ml of deionized water to prepare cerium nitrate and citric acid solutions;

[0021] 2) Then slowly add the cerium nitrate solution into the citric acid solution under stirring, stir evenly at 65°C, add ammonia water dropwise, adjust the pH value to 2.3, then put it in a water bath and stir at 80°C until the reaction occurs Sol, put the formed sol into a drying oven and dry at 100°C to form a xerogel;

[0022] 3) The above-mentioned xerogel was fired in a muffle furnace from room temperature to 400°C at a heating rate of 4°C / min for 2 hours to obtain light yellow CeO 2 , Grind the roasted product with a mortar, and finally get a light yellow CeO 2 powder.

Embodiment 3

[0024] 1) First, take 8.69g of cerium nitrate hexahydrate and 16.81g of citric acid and dissolve them in 100ml of deionized water to prepare cerium nitrate and citric acid solutions;

[0025] 2) Then slowly add the cerium nitrate solution into the citric acid solution under stirring, stir evenly at 65°C, add ammonia water dropwise, adjust the pH value to 2.5, then put it in a water bath and stir at 80°C until the reaction occurs Sol, put the formed sol into a drying oven and dry at 100°C to form a xerogel;

[0026] 3) The above-mentioned xerogel was fired in a muffle furnace from room temperature to 500°C at a heating rate of 5°C / min for 2 hours to obtain light yellow CeO 2 , Grind the roasted product with a mortar, and finally get a light yellow CeO 2 powder.

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

Disclosed is a morphology controllable nanometer CeO2 preparation method. Hexahydrate cerous nitrate and a citric acid are mixed to obtain a mixture, the mixture is stirred in a magnetic force heating stirrer, the potential of hydrogen (pH) of the mixture is adjusted to 2.0 to 2.5 by aqueous ammonia, the mixture is placed in water bath to be reacted and dried in an air-blowing drying oven, then the dried mixture is placed in a muffle furnace to be calcined at different temperatures from 200 DEG C to 700 DEG C to obtain a product, and the calcined product is ground in a agate mortar to obtain a faint yellow CeO2 powder. According to the method, grain growth kinetics and sol-gel method principles are utilized, the different calcination temperatures are controlled in the process of forming the material, so that the material can be synthesized at low temperature, the energy is saved, the agglomeration during material synthesizing is reduced, the production process is simplified, and the average particle diameter of the formed nanometer oxide ceric oxide particle is smaller with the increasing of the calcination temperature.

Description

technical field [0001] The present invention relates to a CeO 2 The preparation method, specifically relates to a nano-CeO with controllable morphology 2 method of preparation. Background technique [0002] Nanoparticles have attracted great attention from scientists all over the world due to their unique optical, acoustic, electrical, magnetic, thermal, catalytic, mechanical, chemical properties and potential application prospects, and have become one of the hot spots in material science research. Ceria and cerium-based nanomaterials are widely used in superconductors, ceramics, three-way catalysts, oxygen sensors, solid oxide fuel cells, ultraviolet absorbers, glass polishing materials, and electrolytes and electrodes of solid oxide fuel cells due to their multifunctional properties. Materials and other high-tech fields have been widely used. Nano ceria is used in various scientific research fields, and the application of nano ceria is on the rise. Although my country ...

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): C01F17/00B82Y40/00
CPCY02P20/10
Inventor 王芬杨彦青周长江
Owner SHAANXI 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