Method for preparing nanometer ceria by solid state reaction at room temperature

A nano-ceria, solid-phase reaction technology at room temperature, applied in chemical instruments and methods, nanotechnology, inorganic chemistry, etc., can solve the problems of harsh preparation conditions, large amount of organic solvent, complicated process, etc., and achieves low reaction temperature. , environment-friendly, simple process effect

Inactive Publication Date: 2011-12-14
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention will solve existing preparation nano-CeO 2 There are disadvantages

Method used

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  • Method for preparing nanometer ceria by solid state reaction at room temperature
  • Method for preparing nanometer ceria by solid state reaction at room temperature
  • Method for preparing nanometer ceria by solid state reaction at room temperature

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specific Embodiment approach 1

[0017] Specific embodiment one: the method for preparing nano-cerium dioxide by solid phase reaction at room temperature is carried out according to the following steps:

[0018] 1. Press CeCl 3 ·7H 2 The molar ratio of O and alkali metal hydroxide is 1:3, respectively weigh CeCl 3 ·7H 2 O and alkali metal hydroxide, then CeCl 3 ·7H 2 O and alkali metal hydroxide are ground into powder respectively at room temperature and then mixed to obtain a mixture;

[0019] 2. Grinding the mixture obtained in step 1 for 15 to 30 minutes to obtain a mixture;

[0020] 3. The mixture obtained in step 2 is ultrasonically cleaned for more than 3 times with deionized water, and then placed in a constant temperature drying oven after suction filtration, and dried at 80-200° C. for 1-2 hours to obtain nano-cerium dioxide.

[0021] In this embodiment, a mortar or a ball mill is used for grinding, and the mortar or ball mill used must be resistant to strong alkali corrosion.

[0022] The nan...

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment is different from Embodiment 1 in that: the alkali metal hydroxide in Step 1 is sodium hydroxide or potassium hydroxide. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the drying temperature in Step 3 is 100-180°C. Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention discloses a method for preparing nano ceria by solid state reaction at room temperature, which relates to a preparation method of nano ceria. The invention aims to solve the disadvantages of complex process, large amount of organic solvent used, harsh preparation conditions and high cost in the existing preparation of nanometer CeO2. The method of the present invention is as follows: 1. CeCl3.7H2O and alkali metal hydroxide are ground into powder at room temperature and then mixed to obtain a mixture; 2. Grinding; 3. Ultrasonic cleaning with water, suction filtration, and drying to obtain nano-dioxide cerium. Compared with the existing method, the present invention has a simple process, does not use any organic solvent, fundamentally eliminates solvation, does not need high-temperature calcination, has mild reaction conditions, and the whole preparation process has no pollution to the environment, and the production efficiency can be further improved, thereby Reduce production costs; compared with other solid-state reaction methods, the reaction temperature is low, the environment is friendly, and the obtained powder particles are small and uniform in particle size and high in purity.

Description

technical field [0001] The invention relates to a preparation method of nanometer cerium dioxide. Background technique [0002] Rare earths are considered to be a treasure trove of new light sources, new magnetic sources, new energy sources, and new materials, as well as "vitamins" for transforming traditional industries and upgrading traditional products. Rare earth nano oxides are an important part of rare earth nanomaterials. Among them, nano-CeO 2 It is the most widely used rare earth nanomaterial. Due to its superior oxygen storage and release function and high-temperature rapid oxygen vacancy diffusion ability, nano-CeO 2 It is widely used in oxidation-reduction reactions, and has become a promising catalytic material for automobile exhaust purification, high-temperature oxygen-sensitive materials, pH sensing materials, fuel cells, especially solid oxide fuel cell (SOFC) electrode materials, electrochemical reaction promotion Materials, as well as coating materials...

Claims

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Application Information

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IPC IPC(8): C01F17/00B82Y40/00
Inventor 孙晓光王铀
Owner HARBIN INST OF TECH
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