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Method for preparing diamond platy cerium oxide

A cerium oxide, flaky technology, applied in the field of preparation of rhombic flaky cerium oxide, can solve the problems of complicated steps, high cost, no mention, etc., and achieve small surface roughness and surface waviness, simple steps and low cost low effect

Active Publication Date: 2010-06-16
SHANGHAI XINANNA ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN200810036385 proposes a preparation method of rhombic cerium oxide nanosheets. In the preparation method of this patent, ultrasonic steps are required to uniformly disperse various reactants in the solvent, so the preparation method takes a long time , and the steps are complicated; in the preparation method of this patent, alcohol washing is required in the subsequent cleaning steps, and the cost is high; at the same time, in this patent, the specific properties of the material obtained by this method are not mentioned, such as CeO 2 Powder particle size, oxidation properties, crystallinity, etc., so it is impossible to infer that the CeO 2 Important properties such as the polishing rate of the mechanical polishing liquid made from the powder

Method used

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  • Method for preparing diamond platy cerium oxide
  • Method for preparing diamond platy cerium oxide

Examples

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Embodiment 1

[0021] Embodiment 1: Get 0.01mol (5.48g) cerium ammonium nitrate, 0.04mol (2.4g) urea, 0.0025mol (0.55g) KH550, be dissolved in water and be made into 100ml aqueous solution, stir well. Pour the above solution into a 500ml three-neck flask and place it in a magnetic stirring electric control heating mantle, carry out heating and reflux reaction under the condition of constant stirring, heat to boiling (94°C), and the reaction time is 5 hours. After the reaction is completed, wait for it to cool down, centrifuge to separate the resulting precipitate, wash it with water three times, dry it at 35°C, and calcinate it at 500°C for one hour to prepare diamond-shaped sheet-shaped cerium oxide. figure 1 It is the SEM picture of the cerium oxide rhombic nanosheets prepared in this example.

Embodiment 2

[0022] Embodiment 2: Get 0.005mol (2.74g) cerium ammonium nitrate, 0.02mol (1.2g) urea, 0.0025mol (0.55g) KH550, be dissolved in water and be made into 50ml aqueous solution, stir well. Pour the above solution into a 500ml three-neck flask and place it in a magnetic stirring electric control heating mantle, carry out heating and reflux reaction under the condition of constant stirring, heat to boiling (94°C), and the reaction time is 5 hours. After the reaction is completed, wait for it to cool down, centrifuge to separate the resulting precipitate, wash it with water three times, dry it at 35°C, and calcinate it at 500°C for one hour to prepare diamond-shaped sheet-shaped cerium oxide.

Embodiment 3

[0023] Embodiment 3: Get 0.01mol (5.48g) cerium ammonium nitrate, 0.08mol (4.8g) urea, 0.0025mol (0.55g) KH550, be dissolved in water and be made into 100ml aqueous solution, stir evenly. Pour the above solution into a 500ml three-necked flask and place it in a magnetic stirring electric heating mantle, carry out heating and reflux reaction under the condition of non-stop stirring, and heat to boiling (95° C.) for a reaction time of 5 hours. After the reaction is completed, wait for it to cool down, centrifuge to separate the resulting precipitate, wash it with water three times, dry it at 35°C, and calcinate it at 600°C for one hour to prepare diamond-shaped sheet-shaped cerium oxide.

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Abstract

The invention belongs to the technical field of inorganic nanometer material preparation and in particular relates to a method for preparing diamond platy cerium oxide. The method comprises the following step: Cerium ammonium nitrate, precipitant and silane coupling agent are dissolved in water and evenly stirred to be completely dissolved; heating backflow reaction is carried out on the mixture, the reaction temperature is 70-100 DEG C, reaction time lasts for 1-20 hours; then centrifugal separation and washing are carried out on the obtained product; then the mixture is dried at low temperature of 30-40 DEG C; finally the dried product is calcinated, and calcination temperature is 300-1200 DEG C, thus obtaining the diamond platy cerium oxide. The diamond platy cerium oxide prepared by the method of the invention enjoys wide application prospect in high-tech fields such as chemically mechanical polishing, automobile exhaust catalytic purification, fuel cell, ultraviolet light absorption and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nanometer materials, and in particular relates to a preparation method of diamond-shaped sheet-shaped cerium oxide. Background technique [0002] my country is rich in rare earth resources. Due to the unique f-electron configuration of rare earth elements, they have unique optical, electrical and magnetic properties. Nanomaterials exhibit special physical and chemical properties different from conventional bulk materials due to their unique surface effects and quantum size effects. Therefore, the synthesis and application of nano-rare earth materials has become one of the research hotspots of scientists all over the world. [0003] As a typical rare earth oxide, cerium oxide has many unique properties and is widely used in polishing materials, electronic ceramics, glass polishing, automobile exhaust purification, ultraviolet absorption, fuel cells and other fields, and has broad ...

Claims

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Application Information

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IPC IPC(8): C01F17/00B82B3/00
Inventor 刘卫丽张泽芳俞磊宋志棠
Owner SHANGHAI XINANNA ELECTRONICS TECH