Method for preparing cerium dioxide nanometer powder

A technology of nano-powder and ceria, which is applied in the field of preparation of ceria nano-powder, can solve the problems of long time consumption, low yield, unfavorable mass production, etc., and achieve the effect of low cost

Inactive Publication Date: 2013-02-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional hydrothermal method has low yield, long time consumption and high energy consumption, which is not conducive to mass production

Method used

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  • Method for preparing cerium dioxide nanometer powder
  • Method for preparing cerium dioxide nanometer powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Step 1: Analytical pure Ce(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to obtain Ce(NO 3 ) 3 solution;

[0017] Ethylenediamine, PVP, KBrO 3 with Ce(NO 3 ) 3 ·6H 2 O mixes ethylenediamine, PVP, KBrO in a molar ratio of 2:4:3:1 3 Add Ce(NO 3 ) 3 The solution was continuously stirred at 60°C for 2 hours to obtain a mixed solution;

[0018] Step 2: Transfer the mixed solution into a reaction kettle, place it in a microwave hydrothermal instrument at 180°C for 0.5h, centrifuge and wash after reaction, and dry at 80°C to obtain CeO 2 Nano powder.

[0019] The resulting CeO 2 The nano-powder is measured with a D / Max-2200pc type X-ray diffractometer produced by Japan Rigaku Company, and the results are as follows: figure 1 As shown, the pure phase CeO with better crystallinity was obtained 2 Nano powder, the JCPDS card number of the product is found to be 33-0394, which belongs to the cubic crystal system. The microscopic morphology of the sample was obse...

Embodiment 2

[0021] Step 1: Analytical pure Ce(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to obtain Ce(NO 3 ) 3 solution;

[0022] Ethylenediamine, PVP, KBrO 3 with Ce(NO 3 ) 3 ·6H 2 O mixes ethylenediamine, PVP, KBrO in a molar ratio of 4:3:5:1 3 Add Ce(NO 3 ) 3 The solution was continuously stirred at 60°C for 2 hours to obtain a mixed solution;

[0023] Step 2: Transfer the mixed solution into a reaction kettle, place it in a microwave hydrothermal instrument and react at 160°C for 1.5h, centrifuge and wash after reaction, and dry at 80°C to obtain CeO 2 Nano powder.

Embodiment 3

[0025] Step 1: Analytical pure Ce(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to obtain Ce(NO 3 ) 3 solution;

[0026] Ethylenediamine, PVP, KBrO 3 with Ce(NO 3 ) 3 ·6H 2 O mixes ethylenediamine, PVP, KBrO at a molar ratio of 1:6:4:1 3 Add Ce(NO 3 ) 3 The solution was continuously stirred at 60°C for 2 hours to obtain a mixed solution;

[0027] Step 2: Transfer the mixed solution into a reaction kettle, place it in a microwave hydrothermal instrument at 190°C for 1 hour, centrifuge and wash after reaction, and dry at 80°C to obtain CeO 2 Nano powder.

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Abstract

A method for preparing cerium dioxide nanometer powder includes: dissolving Ce(NO3)3-6H2O in deionized water to obtain Ce(NO3)3 solution; adding ethidene diamine and KBrO3 into the Ce(NO3)3 solution to continuously and evenly stir to obtain mixed solution; and transferring the mixed solution into a reaction kettle, placing the mixed solution into a microwave hydrothermal instrument to react for 0.5-1.5h at the temperature of 160-200 DEG C, performing centrifugal washing after the reaction, and drying at the temperature of 80 DEG C to obtain CeO2 nanometer powder. The method for preparing cerium dioxide nanometer powder is low in cost and easy to operate and control. The CeO2 powder prepared by the microwave hydrothermal method can be directly applied to preparation of mixed and compounded CeO2 nanometer powder, and a new application is provided for preparation of a CeO2-based new material. Compared with the traditional hydrothermal method, the microwave hydrothermal method has the advantages of being environment-friendly, energy-saving and efficient.

Description

technical field [0001] The invention relates to a preparation method of ceria, in particular to a preparation method of ceria nanopowder. Background technique [0002] CeO 2 It is an important functional rare earth oxide with a cubic crystal structure. CeO 2 With excellent electrical and optical properties, it has a wide range of applications in automobile exhaust catalysis, photolysis of water, ultraviolet shielding, gas sensors, fuel cell electrolytes, polishing materials, oxygen storage materials and many other fields, and has a good prospect. nano-CeO 2 And its composite material has high specific surface energy and oxygen storage capacity, and has good catalytic performance. In the field of catalysis, CeO 2 It is often used as a carrier to combine with metals to form a catalyst with excellent performance. It not only plays a role in dispersing, shaping and stabilizing the supported metals, but also its oxygen storage capacity can also provide active oxygen during t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y30/00
Inventor 王芬周长江丁阳
Owner SHAANXI UNIV OF SCI & TECH
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