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Ceria-zirconia oxide nanometer material dispersed in water medium

A technology of cerium-zirconium oxide and nanomaterials, which is applied in the direction of nanotechnology, nanotechnology, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of nanoparticle monodispersity and achieve high mass percentage Effect

Active Publication Date: 2015-04-08
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] The purpose of the present invention is to overcome the deficiencies of the prior art, to propose a water medium dispersed cerium-zirconium oxide nanomaterial and its synthesis method, to solve the problem that the cerium-zirconium oxide nanomaterial can be widely used in the water. The key technical issue of monodispersion in the medium

Method used

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  • Ceria-zirconia oxide nanometer material dispersed in water medium
  • Ceria-zirconia oxide nanometer material dispersed in water medium
  • Ceria-zirconia oxide nanometer material dispersed in water medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Dispersion of cerium zirconium oxide Ce in water medium 0.2 Zr 0.8 o 2 Synthesis of Nanomaterials:

[0074] Take 0.010mol Ce(NO 3 ) 3 ·6H 2 O was added to deionized water and stirred to dissolve, and 0.040mol Zr(NO 3 ) 4 ·5H 2 Add O into deionized water and stir to dissolve, mix cerium and zirconium salt solutions and add 0.61ml of hydrogen peroxide (30w%), dilute to 80ml with deionized water, and record it as liquid A; take 7.49ml of concentrated ammonia water (25w%), 9.60 Add 1 g of ammonium carbonate to deionized water to form an alkaline solution, dilute to 80 ml with deionized water, and record it as liquid B. Stir the liquid A and heat it to 60° C., drop the liquid B into the liquid A until the pH of the liquid A is 8.3-8.5, and obtain a Ce-Zr mixed hydroxide precipitate suspension. Stir the suspension at 80°C for 2h, add 40ml of ethylene glycol, use a reflux device to reflux at a heating temperature of 105°C with stirring for 2h, and cool to room tempera...

Embodiment 2

[0079] Dispersion of cerium zirconium oxide Ce in water medium 0.3 Zr 0.7 o 2 Synthesis of Nanomaterials:

[0080] Take 0.012mol Ce(NO 3 ) 3 ·6H 2 O was added to deionized water and stirred to dissolve, and 0.028mol ZrOCO 3 ·nH 2 O (dissolved with nitric acid first) was added to deionized water and stirred to dissolve, mixed with cerium and zirconium salt solution, diluted to 80ml with deionized water, and recorded as solution A; take 3.32ml of concentrated ammonia water (25w%) and 1.77g of sodium hydroxide to add Make an alkaline solution in deionized water, add 0.73ml of hydrogen peroxide (30w%), dilute to 80ml with deionized water, and record it as solution B. Drop liquid A into liquid B under stirring, and adjust the pH to 8.5-8.8 with dilute ammonia water after dripping of liquid A to obtain Ce-Zr mixed hydroxide precipitate suspension. Let the suspension stand overnight, add 20ml of ethanol and 20ml of isopropanol, reflux at a heating temperature of 85°C with stirr...

Embodiment 3

[0085] Dispersion of cerium zirconium oxide Ce in water medium 0.4 Zr 0.6 o 2 Synthesis of Nanomaterials:

[0086] Take 0.018mol Ce(Ac) 3 4H 2 O was added to distilled water and stirred to dissolve, and 0.027mol ZrOCl was taken 2 ·8H 2 Add O into distilled water and stir to dissolve, mix cerium and zirconium salt solutions, dilute to 60ml with distilled water, and record it as liquid A; add 4.72ml of concentrated ammonia water (25w%) and 6.68g of sodium carbonate into distilled water to make an alkali solution, dilute with distilled water When it reaches 60ml, it is recorded as liquid B; take a container and add 60ml of distilled water, add 1.45ml of hydrogen peroxide (30w%), and record it as liquid C. Stir liquid C and heat it to 60°C, titrate liquid A and liquid B into liquid C concurrently until the titration of liquid A is completed, adjust the pH to 8.2-8.5, and obtain Ce-Zr mixed hydroxide precipitate suspension. Stir the suspension at room temperature for 5 h, ad...

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Abstract

The invention provides a ceria-zirconia oxide nanometer material dispersed in water medium. Water is used as a dispersion medium, solid solution nano-particles prepared from cerium oxide and zirconium oxide are used as dispersion-phase sol, wherein the nano-particle is a single crystal with the nanoscale being 2-8nm and is singly dispersed in the water medium; the mass of the CexZr(1-x)O2 nano-particles is 0.1-30% of the volume of the nanometer material sol, the content of the CexZr(1-x)O2 nano-particles can be further increased through evaporation and concentration or water can be added freely for dilution. The prepared ceria-zirconia oxide nanometer material has the nano-meter characteristics of remarkable small size effect and surface effect and the like, and can be used for an oxygen storage / release material of a three-way catalyst for automobile exhaust gas purification, a carrier of a supported catalyst or an assisted-catalysis material, optical glass, semiconductors, LED ultra-precision polishing materials, a surface layer thermal barrier or a wear-resistant material of a special plate, a catalytic promoter of a fuel cell anode, and an optimal property modifying agent for hydrogen storage, sensing, luminous and ceramic materials and the like.

Description

technical field [0001] The invention relates to a rare earth cerium-based oxide nano material, in particular to a cerium-zirconium oxide nano material. Background technique [0002] Cerium-zirconium oxide, or a co-solution oxide of cerium oxide and zirconium oxide, is a rare earth cerium-based composite material that is widely used in industry. For example, it is used as polishing material for optical glass, quartz glass, semiconductor, LED, UV shielding material for cosmetics, textiles, light-transmitting glass, surface thermal barrier or wear-resistant material for special plates, catalytic accelerator for fuel cell anode, load Support or co-catalyst for type catalysts, and modifiers for materials such as hydrogen storage, sensing, luminescence, and ceramics. [0003] Most of the industrial use of cerium-zirconium oxide is used as an oxygen storage / release material for three-way catalysts for the purification of motor vehicle exhaust gas. The material is derived from Ce ...

Claims

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Application Information

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IPC IPC(8): B01J23/10B01J35/00C09G1/02B82Y30/00B82Y40/00
Inventor 胡安明李青高晟民
Owner SICHUAN UNIV
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