Controllable dual-porous Ce/Zr composite oxide, and preparation method and application thereof

A composite oxide, double-channel technology, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve problems such as inability to meet practical application needs and deficiencies. To achieve the effect of excellent loading performance and catalytic performance

Active Publication Date: 2019-03-29
SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
View PDF2 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the cerium-zirconium composite oxides in the prior art have shortcoming...

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
  • Controllable dual-porous Ce/Zr composite oxide, and preparation method and application thereof
  • Controllable dual-porous Ce/Zr composite oxide, and preparation method and application thereof
  • Controllable dual-porous Ce/Zr composite oxide, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] This embodiment provides a composite oxide based on cerium oxide, zirconium oxide, lanthanum oxide, and yttrium oxide and a preparation method thereof.

[0072] Among them: cerium oxide, zirconium oxide, lanthanum oxide, and yttrium oxide are recorded in proportions by weight: 25%, 60%, 4%, and 11%.

[0073] The preparation steps are as follows:

[0074] In the first beaker, dissolve 140g of cerium ammonium nitrate corresponding to cerium oxide in 500ml of deionized water, add 38.9g of EDTA, and stir for 1h; in the second beaker, add 336g of zirconium nitrate corresponding to zirconia and 85.4g of EDTA, and use 1000ml Dissolve in deionized water and stir for 1 hour; in the third beaker, dissolve 22.4g of lanthanum nitrate corresponding to lanthanum oxide and 61.6g of yttrium nitrate corresponding to yttrium oxide with 1000ml of deionized water, and stir the solution until clear.

[0075] Mix the solutions in the three beakers, stir until clear, and adjust the pH to 1.5...

Embodiment 2

[0080] This embodiment provides a composite oxide based on cerium oxide, zirconium oxide, lanthanum oxide, and praseodymium oxide and a preparation method thereof.

[0081] Among them: cerium oxide, zirconium oxide, lanthanum oxide, and praseodymium oxide are recorded in proportions by weight: 40%, 50%, 4%, and 6%.

[0082] The preparation steps are as follows:

[0083] In the first beaker, dissolve 224g of cerium ammonium nitrate corresponding to cerium oxide in 800ml of deionized water, add 62.2g of EDTA, and stir for 1h; in the second beaker, add 280g of zirconium Dissolve in deionized water and stir for 1 hour; in the third beaker, dissolve 22.4g of lanthanum nitrate corresponding to lanthanum oxide and 33.6g of yttrium nitrate corresponding to yttrium oxide with 700ml of deionized water, and stir the solution until clear.

[0084] Mix the solutions in the three beakers, stir until clear, and adjust the pH to 1.5 with ammonia water in a water bath at 40°C. At this time, t...

Embodiment 3

[0088] This embodiment provides a composite oxide based on cerium oxide, zirconium oxide, lanthanum oxide, and neodymium oxide and a preparation method thereof.

[0089] Among them, the proportions of cerium oxide, zirconium oxide, lanthanum oxide and neodymium oxide are: 40%, 50%, 4%, 6% by weight.

[0090] The preparation method is:

[0091] In the first beaker, dissolve 224g of cerium ammonium nitrate corresponding to cerium oxide in 800ml of deionized water, add 62.2g of EDTA, and stir for 1h; in the second beaker, add 280g of zirconium Dissolve in deionized water and stir for 1 hour; in the third beaker, dissolve 22.4g of lanthanum nitrate corresponding to lanthanum oxide and 33.6g of yttrium nitrate corresponding to neodymium oxide with 700ml of deionized water, and stir the solution until clear.

[0092] Mix the solutions in the three beakers, stir until clear, and adjust the pH to 1.5 with ammonia water in a water bath at 40°C. At this time, the solution is clear and ...

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
Pore volumeaaaaaaaaaa
Login to view more

Abstract

The invention relates to the field of inorganic nano materials and particularly relates to a controllable dual-porous Ce/Zr composite oxide, and a preparation method and an application thereof. The Ce/Zr composite oxide comprises, by weight, 25-60% of cerium oxide, 35-60% of zirconium oxide, and 5-15% of one or more of lanthanum oxide, praseodymium oxide, neodymium oxide, yttrium oxide or samariumoxide. The dual-porous Ce/Zr composite oxide has a spherical or spheroid approximated core/shell structure and includes an inner core and an outer shell. The pore diameter of an inner near-core structure is 0-10 nm while the pore diameter of an outer near-shell structure is 10-100 nm. The method employs accessible and low-cost raw materials and a simple and controllable synthesis approach and issuitable for large-scale production.

Description

technical field [0001] The invention relates to the field of inorganic nanomaterials, in particular to an adjustable double-channel cerium-zirconium composite oxide and its preparation method and application. Background technique [0002] Cerium-zirconium composite oxides are widely used in the field of mobile source catalysis due to their excellent oxygen storage and release properties. In addition to participating in the catalytic reaction, the cerium-zirconium composite oxide also has the function of a carrier, supporting and dispersing the active metal. During the catalytic reaction, the pore structure of the support plays an important role in the conversion efficiency of the reactants in the catalytic reaction, and the noble metal clusters supported by the pores in the support are the main catalytic active centers. [0003] Vehicle exhaust pollutants mainly include nitrogen oxides, carbon monoxide, hydrocarbons and soot particles. With the arrival of China VI, gasolin...

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): B01J23/10B01J35/08B01J35/10
CPCB01J23/002B01J23/10B01J35/08B01J35/1014B01J35/1019B01J35/1061B01J35/1066B01J2523/00B01J2523/36B01J2523/3706B01J2523/3712B01J2523/48B01J2523/3718B01J2523/3725B01J2523/35
Inventor 宋锡滨潘光军刘洪升焦英训艾辽东
Owner SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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