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Industrial microwave rapid synthesis method of ultra-large specific surface area nano cerium dioxide

A technology of nano-cerium dioxide and specific surface area, which is applied in chemical instruments and methods, nanotechnology, rare earth metal compounds, etc., can solve the problems of poor safety, difficulty in industrial scale-up synthesis, and high requirements for instruments and equipment, and achieve the synthesis device Simple, low raw material purity requirements, uniform distribution effect

Inactive Publication Date: 2013-04-03
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above reactions are all carried out in a closed system, the safety is not good, the requirements for instruments and equipment are relatively high, and it is difficult to carry out industrial scale-up synthesis

Method used

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  • Industrial microwave rapid synthesis method of ultra-large specific surface area nano cerium dioxide
  • Industrial microwave rapid synthesis method of ultra-large specific surface area nano cerium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An industrial microwave rapid synthesis method of ultra-large specific surface area nano ceria, the preparation steps are as follows:

[0033] d. The cerium source can be selected from cerous nitrate (Ce(NO 3 ) 3 Industrial grade), ammonium cerium nitrate ((NH 4 ) 2 Ce(NO 3 ) 6 Industrial grade), cerous chloride (CeCl 3 Industrial grade), tetraethylenepentamine is the alkali source, and the solvent is water;

[0034] e. Add the cerium source and water into an ordinary plastic container, the volume ratio of the cerium source and water is 30 parts: 80 parts by volume, stir for 15 min, then add 130 parts of organic base to the above solution, and continue stirring for 30 min , the microwave power is 4000 W, the current is 1 A, and the reaction time is 50 min under the condition of blasting.

[0035] f. After the reaction is completed, take it out, separate the precipitate, wash it with water, wash away the surface lye and impurities, and dry it.

[0036]

Embodiment 2

[0038] An industrial microwave rapid synthesis method of ultra-large specific surface area nano ceria, the preparation steps are as follows:

[0039] The cerium ammonium nitrate was used as the cerium source, triethylenetetramine was used as the alkali source, and the solvent was water; the cerium source and 4.5 L of water were added to a plastic reaction vessel with a volume of 10 L, stirred for 15 min, and then 22.5 mL of triethylenetetramine was added. Add ethylenetetramine to the above solution, continue stirring for 30 min, adjust the power of the microwave oven to 4000 W, the current 1 A, and set the reaction time to 50 min. After the reaction is completed, take it out, separate the precipitate, wash it with water, wash away the surface lye and impurities, and dry it.

Embodiment 3

[0041] An industrial microwave rapid synthesis method of ultra-large specific surface area nano ceria, the preparation steps are as follows:

[0042] Use cerous chloride as the cerium source, triethylenetetramine as the alkali source, and water as the solvent; by volume, the volume ratio of the cerium source to water is 30 parts: 90 parts, stir for 15 min, and then add the organic base triethylenetetramine Add 150 parts of amine to the above solution, in a plastic reaction container, stir for 15 min, then add 22.5 mL triethylenetetramine to the above solution, continue stirring for 30 min, adjust the power of the microwave oven to 4000 W, the current 1 A, and set the reaction time to 50 min. After the reaction is completed, take it out, separate the precipitate, wash it with water, wash away the surface lye and impurities, and dry it.

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Abstract

The invention provides an industrial microwave rapid synthesis method of ultra-large specific surface area nano cerium dioxide, which is characterized in that an industrial microwave oven is used as a heat source, a simple microwave method is adopted, water is used as a solvent, organic amine is used as an alkaline source (triethylene tetramine, tetraethylenepentamine, diethanol amine and ethanol amine), high temperature and high pressure are not needed, a surfactant is not needed to be added, and the ultra-large specific surface area nano cerium dioxide is rapidly synthesized within 50min. By adopting microwave heating, the synthesis time of the cerium dioxide is shortened, and the granularity of the synthesized cerium dioxide is more uniform. The cerium dioxide prepared by adopting the synthesis method has the granularity of about 4-5nm and the specific surface area of about 152m<2> / g, and has the advantages of good dispersity, difficulty in agglomeration, simple synthetic path, convenience and rapidness in operation, and the like.

Description

technical field [0001] The invention relates to a method for preparing nano cerium oxide with super large specific surface area. Background technique [0002] Nanomaterials exhibit special properties different from conventional materials due to their unique surface effects and quantum size effects, and thus are widely used in various fields. As a member of new materials—research on rare earth nanomaterials has also become one of the hotspots of scientists from all over the world. Among them, nano-rare earth oxides have many special properties and uses that traditional solids do not have. CeO 2 It is a cheap and widely used light rare earth oxide, and enjoys the reputation of "industrial monosodium glutamate in the 21st century". It is widely used as luminescent material, electronic ceramics, glass polishing agent, glass decolorization clarifier; it is also an important component in superconductors, ceramics, gas sensors, petroleum cracking catalysts and homogeneous cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y40/00
Inventor 钟声亮井红宇王雷
Owner JIANGXI NORMAL UNIV
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