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Preparation method of cerium dioxide nano hollow sphere

A technology of ceria and hollow spheres, which is applied in the preparation of microspheres, chemical instruments and methods, rare earth metal oxides/hydroxides, etc., can solve the problems of long precursor time, etc., and achieve simple methods and fast crystallization speeds , Heating effect evenly

Inactive Publication Date: 2017-08-15
JIANGXI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this article uses a mixed solvothermal method, and the precursor synthesis takes a long time. Therefore, finding a simple and efficient method to synthesize materials with a multilayer core-shell structure is still a major challenge so far.

Method used

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  • Preparation method of cerium dioxide nano hollow sphere
  • Preparation method of cerium dioxide nano hollow sphere

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Experimental program
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Embodiment 1

[0029] Step 1: Dissolve 0.1 mmol of cerium nitrate and 0.3 mmol of pyridine-2,5-dicarboxylic acid in a mixed solvent of 10 ml of absolute ethanol and 10 ml of dimethylformamide;

[0030] Step 2: Put the above mixed solution in a polytetrafluoroethylene-lined microwave tank, react at 180°C for 20 minutes, centrifuge and wash after the reaction, and dry at 60°C to obtain cerium coordination polymer ultramicrosphere powder;

[0031] Step 3: Place the dried sample obtained above in a muffle furnace, calcinate at 600 °C for 4 h, and cool to room temperature to obtain a multilayer core-shell structure CeO 2 hollow ball.

Embodiment 2

[0033] Step 1: Add 0.1 mmol Ce(NO 3 ) 3 ·6H 2 O cerium nitrate and 0.3 mmol pyridine-2,5-dicarboxylic acid were dissolved in a mixed solvent of 10 ml absolute ethanol and 10 ml dimethylformamide;

[0034] Step 2: Put the above mixed solution in a microwave reaction tank, react at 160 °C for 10 min, centrifuge and wash after reaction, and dry at 60 °C to obtain cerium coordination polymer ultramicrosphere powder;

[0035] Step 3: Place the dried sample obtained above in a muffle furnace for calcination at 600 °C for 4 h, and cool to room temperature to obtain a multilayer core-shell structure CeO 2 hollow ball.

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Abstract

The invention relates to a preparation method of cerium dioxide nano hollow sphere. The method is characterized in that cerium nitrate and pyridine-2,5-dicarboxylic acid are respectively dissolved in absolute ethyl alcohol and DMF, volume ratio of two solvents is 1:1, and a Ce(NO3)3 solution with the concentration of 0.01-0.2 mol / L is prepared after mixing stirring. The average particle size of the synthesized CeO2 nano hollow sphere having a multilayer core-shell structure is 300 nm, the distribution is uniform, multi-shell CeO2 has the porous core-shell hollow structure and has wide important latent application, such as for absorbing pollutant in sewage and sensing gas; and the method has the advantages of uniform heating, high products purity, high energy utilization rate, short reaction time, and clean heating environment.

Description

technical field [0001] The invention relates to a method for preparing ceria, in particular to a method for preparing hollow ceria nanospheres. Background technique [0002] Rare earth coordination polymers are an important category among the large number of coordination polymers. Because of their wide application in optics, catalysis, magnetism, etc., researchers have generally paid attention to them. In the research of various rare earth materials Among them, the preparation and application of rare earth oxides have always been the key research objects. Controlling their properties and applications by adjusting the morphology and size of rare earth oxides is also one of the current research focuses. Rare earth oxides can be better achieved by preparing rare earth oxides as precursors. Rare earth oxides synthesized by simple calcination of rare earth coordination polymers generally have the advantages of porous structure and large specific surface, so they also have Even m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B01J13/02
CPCB01J13/02C01F17/206C01P2002/01C01P2002/72C01P2002/76C01P2004/04C01P2004/34C01P2004/62
Inventor 钟声亮廖媛媛李苑王雷宁海金徐先进
Owner JIANGXI NORMAL UNIV
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