Nano cerium oxide with core-shell structure and preparation method thereof

A nano-cerium oxide, core-shell structure technology, applied in nano-structure manufacturing, chemical instruments and methods, nanotechnology and other directions, can solve the problems of high reagent cost, complex synthesis process, small specific surface area of ​​cerium oxide, etc. Simple preparation process and easily controllable structure

Inactive Publication Date: 2008-04-23
SHANGHAI NORMAL UNIVERSITY
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these synthesis methods have disadvantages such as high reagent cost, complex synthesis process, and small specific surface area of ​​the synthesized cerium oxide. The preparation method of nano-cerium oxide with core-shell structure has not been reported yet.

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
  • Nano cerium oxide with core-shell structure and preparation method thereof
  • Nano cerium oxide with core-shell structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] While stirring, make a mixed solution of 10mL glycerol, 10mL ether, 1.5mL water and 20mL ethanol, then add 2mmol of cerium ammonium nitrate to the solution, stir until colorless, then transfer to 50mL of water In a hot kettle, heat at 160°C for 24 hours, filter the product, wash with deionized water and absolute ethanol three times, dry at 80°C for 24 hours, and then roast in a muffle furnace at 400°C for 4 hours to obtain Nano cerium oxide with core-shell structure, its specific surface area is 105.5cm 2 / g. The X-ray diffraction pattern is shown in Figure 1, the nitrogen adsorption-desorption isotherm and BJH pore size distribution are shown in Figure 2, and the scanning electron microscope and transmission electron microscope pictures are shown in Figure 3 and Figure 4.

Embodiment 2

[0022] While stirring, make a mixed solution of 10mL glycerol, 4mL cyclohexane, 1.5mL water and 20mL ethanol, then add 2mmol of cerium ammonium nitrate to the solution, stir until colorless, then transfer to 50mL In a hydrothermal kettle, heated at 160°C for 72 hours, the product was suction filtered, washed three times with deionized water and absolute ethanol, dried at 80°C for 18 hours, and then roasted in a muffle furnace at 400°C for 4 hours. Obtain nano cerium oxide with core-shell structure, its specific surface area is 98.3cm 2 / g.

Embodiment 3

[0024] While stirring, make a mixed solution of 1.08g of glucose, 10mL of ether, 10mL of water and 20mL of ethanol, then add 2mmol of cerium ammonium nitrate into the solution, stir until colorless, then transfer to a 50mL hydrothermal kettle In 160°C hydrothermal treatment for 48h, the product was suction filtered, washed three times with deionized water and absolute ethanol respectively, dried at 80°C for 18h, and then roasted in a muffle furnace at 400°C for 4 hours to obtain a core-shell Structured nano cerium oxide with a specific surface area of ​​72.7 cm 2 / g.

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

This invention discloses the shell-and-kernel structured nanometer cerium oxide and its preparation method, particularly ball-shaped structure with the grain size of 400-1000nm and the kernel size of 200-700nm and specific surface area of 70-120m2 / g. In this invention method, soluble composite ammonium salt is used as predecessor, mixed with mixture solvent, being heated by heating the solvent making the same being curing to form this inventive product. This invention has advantages of: low cost, simple process, easy to be controlled, providing general technique for synthesis of inorganic oxides, and the inventive product has potential utilization in fields of nanometer device, catalysis, polishing or the like.

Description

technical field [0001] The invention relates to a preparation method of nano cerium oxide with a core-shell structure, and belongs to the technical field of preparation of rare earth compounds. Background technique [0002] The unique f electron configuration of rare earth elements makes rare earth oxides have some excellent properties. As a typical representative of rare earth oxides, cerium oxide has a wide range of applications in automobile exhaust treatment, solid fuel cells, luminescent materials, ultraviolet absorbing materials, ceramic materials, polishing powder, etc. due to its unique valence change and oxygen storage functions. Nano-cerium oxide has become one of the hotspots in the synthesis and application of cerium oxide due to its special properties such as large specific surface area, small nano-size effect, and high surface activity. [0003] People have studied different methods such as precipitation method, sol-gel method, and hydrothermal method to synth...

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): C01F17/00B82B3/00
Inventor 李和兴陆斌李辉张昉林宏
Owner SHANGHAI NORMAL UNIVERSITY
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