Method for preparing nanometer cerium oxide by hydrothermal method

A technology of nano-cerium oxide and hydrothermal method, which is applied in chemical instruments and methods, nanotechnology, inorganic chemistry, etc., can solve the problems of high cost, complex formula, harsh production conditions, etc., and achieve low production cost, simple preparation process, The effect of low requirements on production equipment and process conditions

Inactive Publication Date: 2013-01-02
ZHEJIANG SCI-TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current chemical preparation methods include precipitation method, sol-gel method, hydrothermal method and microemulsion method, etc., which can produce one-dimensional nanorod-shaped cerium oxide, but these methods have complicated formulas, and generally need to add suitable surfactants. Disadvantages such as harsh conditions and high cost

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  • Method for preparing nanometer cerium oxide by hydrothermal method
  • Method for preparing nanometer cerium oxide by hydrothermal method
  • Method for preparing nanometer cerium oxide by hydrothermal method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 1) Prepare 0.05mol / L Ce(NO 3 ) 3 ·6H 2 O aqueous solution;

[0033] 2) Take 91mL of Ce(NO 3 ) 3 ·6H 2 O aqueous solution was placed in a flask, and under magnetic stirring, 9.1 mL of ammonia water was added dropwise to the flask;

[0034] 3) The above mixed solution was reacted under magnetic stirring, and 1 mL of the mixed solution was taken at the end of the reaction for 2 hours, 8 hours and 24 hours, respectively, and the sample was centrifuged to remove the upper liquid. Wash the powder obtained by centrifugation with pure water, then place it in a drying oven and dry it into a solid powder, observe it with a transmission electron microscope, and find that the obtained product is cerium oxide nanoparticles with a particle size of 10-30nm, see attached figure 1 .

Embodiment 2

[0036] 1) Prepare 0.08mol / L Ce(NO 3 ) 3 ·6H 2 O aqueous solution;

[0037] 2) Take 83mL of Ce(NO 3 ) 3 ·6H 2 O aqueous solution is placed in the flask, and under magnetic stirring, 16.6mL of ammonia water is added dropwise to the flask;

[0038] 3) The above-mentioned mixed solution was reacted under magnetic stirring respectively, and 1 mL of the mixed solution was taken at the end of the reaction for 2 hours, 8 hours and 24 hours, respectively, and the sample was centrifuged to remove the upper liquid. Wash the powder obtained by centrifugation with pure water, then place it in a drying oven and dry it into a solid powder, observe it with a field emission scanning electron microscope, and find that the obtained product is cerium oxide nanoparticles with a particle size of 10-30nm and a diameter of 10-30nm , a mixture of nanorods with a length of 100-300 nm, see attached figure 2 .

Embodiment 3

[0040] 1) Prepare 0.1mol / L Ce(NO 3 ) 3 ·6H 2 O aqueous solution;

[0041] 2) Take 77mL of Ce(NO 3 ) 3 ·6H 2 O aqueous solution was placed in a flask, and under magnetic stirring, 23.1 mL of ammonia water was added dropwise to the flask;

[0042] 3) The above-mentioned mixed solution was reacted under magnetic stirring respectively, and 1 mL of the mixed solution was taken at the end of the reaction for 2 hours, 8 hours and 24 hours, respectively, and the sample was centrifuged to remove the upper liquid. Wash the powder obtained by centrifugation with pure water, then place it in a drying oven and dry it into a solid powder, observe it with a field emission scanning electron microscope, and find that the obtained product is a nanorod with a diameter of 10-30nm and a length of 100-300nm. image 3 .

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Abstract

The invention provides a method for preparing nanometer cerium oxide. The invention adopts the following technical scheme that the method comprises the following steps: 1) preparing a Ce(NO3)3.6H2O aqueous solution with a concentration of 0.05-0.1 mol/L at room temperature; 2) taking a certain volume of the Ce(NO3)3.6H2O aqueous solution at room temperature, dropwisely adding undiluted commercially-available 25% ammonia water into the Ce(NO3)3.6H2O aqueous solution according to a volume ratio of 10:1-3; 3) allowing the mixed solution to react for 2-24 hours, after the reaction, performing centrifugation, removing the liquid at the upper level, washing the powder obtained after centrifugation, and drying to obtain solid powder. The invention realizes one-step synthesis of nanometer cerium oxide by a hydrothermal method; the preparation process is simple, and the requirements for production equipment and process conditions are low; no organic solvent is added, which is basically free of pollution, and is quite environment-friendly; no macromolecular surfactant is added, which prevents posttreatment process such as washing and the like; the kinds of the required raw materials are few, and when compared with traditional process, the method of the invention is quite low in production cost; the method cam prepare uniform and pure cerium oxide nanoparticles, cerium oxide nanorods, and mixtures of the above two.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing cerium oxide nanoparticle nanorods and a mixture thereof by a hydrothermal method. Background technique [0002] Rare earth nano-oxides have important applications in precision ceramics, photovoltaic cells, magnetic recording and sensors, catalysts, and luminescent materials. Among them, nano-cerium dioxide has the advantages of single crystal form, good electrical and optical properties, and can be widely used. At present, its application scope extends from luminescent materials, glass polishing agents, catalysts, electronic ceramics, ultraviolet absorbers and other fields to automobile exhaust purification catalytic materials, high temperature oxygen sensitive materials, pH sensing materials, solid oxide fuel cell (SOFC) electrode materials , electrochemical reaction promotion materials, chemical mechanical polishing (CMP) abrasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y40/00
Inventor 张顺花张国庆张朝霞汪丽娜邵敏
Owner ZHEJIANG SCI-TECH UNIV
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