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Preparation method of high-dispersion lamellar nanometer ceric oxide/graphene composite material

A nano-ceria and composite material technology is applied in the field of preparation of highly dispersed layered nano-ceria/graphene composite materials, and can solve problems such as affecting the distribution and size of loaded nanoparticles and reducing performance.

Inactive Publication Date: 2014-03-05
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in most cases, these organic additives are adsorbed on the surface of nanoparticles and significantly reduce their performance
Although the reduction process and high temperature treatment can remove the organic additives, the distribution and size of the loaded nanoparticles can be affected during the treatment

Method used

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  • Preparation method of high-dispersion lamellar nanometer ceric oxide/graphene composite material
  • Preparation method of high-dispersion lamellar nanometer ceric oxide/graphene composite material
  • Preparation method of high-dispersion lamellar nanometer ceric oxide/graphene composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 0.43g Ce(NO 3 ) 3 ·6H 2 O was added to 20ml of DMF solvent, ultrasonically dispersed to form mixed solution 1; 100mg of graphite oxide was added to 200ml water, ultrasonically dispersed for 2 hours to form mixed solution 2, mixed solution 2 was poured into a 250ml three-necked flask and stirred, and the water bath was refluxed. When the temperature of the water bath rises to 60°C, slowly add the mixed solution 1, continue to heat up to 90°C and keep it for 1 hour, then add 2ml of hydrazine hydrate (17%) and keep it at 90°C for 6 hours, then wash the obtained precipitate with distilled water and dry it at 60°C , and calcined at 550° C. for 3 hours in an argon atmosphere to obtain a ceria / graphene composite material.

Embodiment 2

[0023] Take 0.43g Ce(NO 3 ) 3 ·6H 2 O and 0.18g of acrylamide were added to 20ml of DMF solvent, ultrasonically dispersed to form a mixed solution 1; 100mg of graphite oxide was added to 200ml of water, ultrasonically dispersed for 2 hours to form a mixed solution 2, and the mixed solution 2 was poured into a 250ml three-necked flask and stirred , the water bath refluxed. When the temperature of the water bath rises to 60°C, slowly add the mixed solution 1, continue to heat up to 90°C and keep it for an hour, then add 2ml of hydrazine hydrate (17%) and keep it at 90°C for 6 hours. After the reaction, the resulting precipitate is washed with distilled water and dried at 60°C. Calcined at 550° C. for 3 hours under an argon atmosphere to obtain a ceria / graphene composite material.

Embodiment 3

[0025] Take 0.43g Ce(NO 3 ) 3 ·6H 2 O and 0.36g of acrylamide were added to 20ml of DMF solvent, ultrasonically dispersed to form a mixed solution 1; 100mg of graphite oxide was added to 200ml of water, ultrasonically dispersed for 2 hours to form a mixed solution 2, and the mixed solution 2 was poured into a 250ml three-necked flask and stirred , the water bath refluxed. When the temperature of the water bath rises to 60°C, slowly add the mixed solution 1, continue to heat up to 90°C and keep it for 1 hour, then add 2ml of hydrazine hydrate (17%) and keep it at 90°C for 6 hours, then wash the obtained precipitate with distilled water and dry it at 60°C , and calcined at 550° C. for 3 hours in an argon atmosphere to obtain a ceria / graphene composite material.

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Abstract

The invention provides a simple and convenient method for preparing a high-dispersion lamellar nanometer ceric oxide / graphene composite material. The simple and convenient method is characterized in that low-cost graphite oxide, an organic raw material and a dimethylformamide (DMF) solution are adopted, acrylamide is used as an additive, hydrazine hydrate is used as a reducing agent, and the distribution and the size of ceric oxide nanometer particles loaded on the surface of graphene can be obviously improved by using a simple water bath reaction and changing the addition amount of the acrylamide. The simple and convenient method is simple to operate; the raw materials are cheap and easy to obtain; the high-dispersion lamellar nanometer ceric oxide / graphene composite material is easy to industrialize and has a wide practical application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of nanometer materials and heterogeneous catalytic materials, and relates to a preparation method of a highly dispersed layered nano ceria / graphene composite material. Background technique [0002] Graphene, a new type of two-dimensional planar carbon-based nanomaterial, has rich and excellent physical, Chemical properties [(a) A.K.Geim and K.S.Novoselov, Nat.Mater2007, 6, 183; (b) D.A.Dikin, S.Stankovich, E.J.Zimney, R.D.Piner, G.H.B.Dommett, G.Evmenenko, S.T.Nguyen, R.S.Ruoff, Nature 2007, 448, 457; (c) G. Eda, G. Fanchini, M. Chhowalla, Nat Nanotechnol 2008, 3, 270; (d) Z. Fan, J. Yan, L. Zhi, Q. Zhang, T. Wei, J. Feng, M. Zhang, W. Qian and F. Wei, Adv. Mater 2010, 22, 3723.]. At present, catalysts prepared by using graphene as a carrier to support metals or metal oxides have shown great application prospects in the fields of catalysis, fuel cells, electronic sensors, biomedicine, and optical devi...

Claims

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Application Information

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IPC IPC(8): B01J23/10B82Y30/00
Inventor 张爱民凌强杨明饶日川杨红晓张清云刘花德
Owner NANJING UNIV
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