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Preparation method of graphene supported cerium oxide nano cubit compound

A technology of ceria and nanocubic, which is applied in the field of preparation of ceria nanocubic composites, can solve the problems of different nanoparticle shapes, poor crystallinity, uneven particles, etc., and achieve the effect of simple and fast preparation method

Inactive Publication Date: 2012-08-15
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The prior art close to the present invention is, "CeO 2 Nanoparticles / graphene nanocomposite-based high performance supercapacitor", in the literature, graphene-loaded CeO was prepared by liquid phase mixing method 2 nanoparticle composite, but the CeO in the composite 2 Nanoparticles have different shapes, uneven particles, poor crystallinity, etc. (see figure 1 , figure 2 ), which greatly affects its performance and application

Method used

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  • Preparation method of graphene supported cerium oxide nano cubit compound
  • Preparation method of graphene supported cerium oxide nano cubit compound
  • Preparation method of graphene supported cerium oxide nano cubit compound

Examples

Experimental program
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Embodiment 1

[0024] 1. Dissolve 20mg of GO powder in 40mL of deionized water and ultrasonically disperse for 2h, the solution turns translucent bright brown and is evenly dispersed.

[0025] 2. Add 434.2mg Ce(NO 3 ) 3 ·6H 2 O crystals, stir well until there are no crystal particles in the solution.

[0026] 3. Then inject 1ml of NH into the above solution 3 ·H 2 O solution.

[0027] 4. Pour the stirred mixed solution into a reaction kettle, place it in a vacuum oven and heat at 220° C. for 24 hours.

[0028] 5. Repeatedly vacuum filter the reacted solution with deionized water until the solution becomes neutral.

[0029] 6. Finally, dry the obtained powder in the air at 50° C. for 48 hours to obtain a graphene-supported ceria nanocubic composite with (200) exposed surfaces.

Embodiment 2

[0031] 1. Dissolve 20mg of GO powder in 40mL of deionized water and ultrasonically disperse for 2h, the solution turns translucent bright brown and is evenly dispersed.

[0032] 2. Add 217.1mg Ce(NO 3 ) 3 ·6H 2 O crystals, stir well until there are no crystal particles in the solution.

[0033] 3. Then inject 1ml of NH into the above solution 3 ·H 2 O solution.

[0034] 4. Pour the stirred mixed solution into a reaction kettle, place it in a vacuum oven and heat at 240° C. for 12 hours.

[0035] 5. Repeatedly vacuum filter the reacted solution with deionized water until the solution becomes neutral.

[0036] 6. Finally, dry the obtained powder in the air at 100°C for 6 hours to obtain a graphene-supported ceria nanocubic composite with (200) exposed surfaces

Embodiment 3

[0038] 1. Dissolve 20mg of GO powder in 60mL of deionized water and ultrasonically disperse for 2h, the solution becomes translucent bright brown and dispersed evenly.

[0039] 2. Add 868.4mg Ce(NO 3 ) 3 ·6H 2 O crystals, stir well until there are no crystal particles in the solution.

[0040] 3. Then inject 3ml of NH into the above solution 3 ·H 2 O solution.

[0041] 4. Pour the stirred mixed solution into a reaction kettle, place it in a vacuum oven and heat at 220° C. for 24 hours.

[0042] 5. Repeatedly vacuum filter the reacted solution with deionized water until the solution becomes neutral.

[0043] 6. Finally, dry the obtained powder in the air at 60° C. for 36 hours to obtain a graphene-supported ceria nanocubic composite with (200) exposed surfaces.

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Abstract

The invention relates to a preparation method of a graphene supported cerium oxide nano cubit composite, belonging to the technical field of cerium oxide composite material preparation methods. The preparation process comprises the following steps: dissolving graphite oxide in deionized water, and carrying out ultrasonic treatment until the solution is dispersed uniformly and appears semitransparent and bright brown; adding cerous nitrate hexahydrate crystal, stirring, adding ammonia water, and pouring into a reaction kettle; reacting at 220-240 DEG C for 12-24 hours; carrying out vacuum filtration on the solution after reaction until the solution becomes neutral; and finally, drying the mud to obtain the graphene supported cerium oxide nano cubic composite with (200) free face. The graphene supported CeO2 nano cubic composite not only has favorable conductivity and high specific area of the graphene, but also has favorable catalytic and luminescent properties and the like of the CeO2; and the preparation method is simple and quick, does not generate pollution, can be operated repeatedly, and can be used for mass production.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of ceria composite materials, in particular to a preparation method of growing ceria nano-cubic composites with (200) exposed surfaces on reduced graphene. Background technique [0002] In 2004, a research team led by Professor Andre Geim and Dr. Kostya Novoselov from the University of Manchester first used a simple micromechanical exfoliation method to obtain graphene with a single atomic layer thickness, thus leading a revolution in this field. Graphene's excellent properties and good application prospects have aroused researchers' unprecedented research enthusiasm. [0003] Graphene-supported composites are one of the many research areas of graphene, which has received more and more attention in recent years. In the composite, graphene provides an ideal two-dimensional support due to its high electrical conductivity, high specific surface area, and good chemical stability, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10C09K11/78
Inventor 刘冰冰江林海姚明光刘波李全军刘然
Owner JILIN UNIV
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