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Method for preparing Fe3O4 nanoparticle/graphene composite material by sol electrostatic self-assembly process and application thereof

A technology of electrostatic self-assembly and nano-particles, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of poor uniformity of composite materials, poor controllability of composite material components in the chemical preparation process, etc., and achieve assembly The method is simple and feasible, the cost is low, and the effect of the process is simple

Inactive Publication Date: 2014-01-08
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the mechanical blending method is simple to operate, the uniformity of the prepared composite material is not good due to the difference in the density of the graphene phase and the metal oxide particles; the growth of the second material on the graphene sheet requires a complex chemical preparation process and the composition of the composite material bad handling

Method used

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  • Method for preparing Fe3O4 nanoparticle/graphene composite material by sol electrostatic self-assembly process and application thereof
  • Method for preparing Fe3O4 nanoparticle/graphene composite material by sol electrostatic self-assembly process and application thereof
  • Method for preparing Fe3O4 nanoparticle/graphene composite material by sol electrostatic self-assembly process and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] At room temperature, prepare 40 mL of 10% FeCl 3 aqueous solution; take a beaker and fill it with 200mL distilled water, and put the prepared FeCl 3 The aqueous solution is added dropwise into boiling water. After the dropwise addition is completed, boil for 2 minutes. The resulting solution is a brick-red transparent aqueous solution. The solution is in a stable state, which is Fe(OH) 3 hydrosol system. Graphene oxide was prepared by the Hummers method, with a negative charge on the surface; the graphene oxide was ultrasonically dispersed in water so that the concentration of graphene oxide reached 0.1 mg / mL. The positively charged Fe(OH) on the surface 3 Add 10.7mL of the sol to the graphene oxide sol, a brown-black precipitate appears under magnetic stirring, separate, remove the supernatant, and obtain Fe(OH) 3 and graphene oxide composite, the composite was reduced at 500°C under an inert atmosphere to prepare Fe 3 o 4 / graphene composites.

[0019] During t...

Embodiment 2

[0021] At room temperature, prepare 40 mL of 10% FeCl 3 aqueous solution; take a beaker and fill it with 200mL distilled water, and put the prepared FeCl 3 The aqueous solution is added dropwise into boiling water. After the dropwise addition is completed, boil for 2 minutes. The resulting solution is a brick-red transparent aqueous solution, which is in a stable state, which is Fe(OH) 3 hydrosol system. Graphene oxide was prepared by the Hummers method, with a negative charge on the surface; the graphene oxide was ultrasonically dispersed in water so that the concentration of graphene oxide reached 0.1 mg / mL. The positively charged Fe(OH) on the surface 3 Add 5mL of the sol to the graphene sol, a brown-black precipitate appears under magnetic stirring, the upper layer solution is light yellow, separate, remove the upper layer liquid, and obtain Fe(OH) 3 and graphene oxide composite, the composite was reduced at 500°C under an inert atmosphere to prepare Fe 3 o 4 / graphe...

Embodiment 3

[0023] At room temperature, prepare 40 mL of 10% FeCl 3 aqueous solution; take a beaker and fill it with 200mL distilled water, and put the prepared FeCl 3 The aqueous solution is added dropwise into boiling water. After the dropwise addition is completed, boil for 2 minutes. The resulting solution is a brick-red transparent aqueous solution, which is in a stable state, which is Fe(OH) 3 hydrosol system. Adopt Hummers method to prepare graphene oxide (W. S. Hummers and R. E. Offeman, J. Am. Chem. Soc., 1958, 80, 1339.), with a negative charge on the surface; ultrasonically disperse graphene oxide into water so that the concentration of graphene oxide reaches 0.1mg / mL. The positively charged Fe(OH) on the surface 3 Add 20mL of the sol solution into the graphene dispersion, a brown-black precipitate appears under magnetic stirring, and the upper layer solution is light brick red, separate, remove the upper layer liquid, and obtain Fe(OH) 3 and graphene oxide composite, the...

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Abstract

The invention discloses a method for preparing a Fe3O4 nanoparticle / graphene composite material by a sol electrostatic self-assembly process, which comprises the following steps: (1) preparing a Fe(OH)3 sol solution of which the surface is positively charged; (2) preparing a graphene oxide sol of which the surface is negatively charged; and (3) mixing the graphene oxide sol and the Fe(OH)3 sol, magnetically stirring to generate a brownish black precipitate, separating, pouring out the supernate to obtain a Fe(OH)3 / graphene oxide composite, and reducing the composite at 300-800 DEG C in a nitrogen atmosphere to obtain the Fe3O4 / graphene nano composite material. The composite of the Fe(OH)3 colloidal particles and graphene oxide is performed in the water solution, and thus, the method has the advantages of low cost, energy saving, environment friendliness and simple technique, and can easily implement industrial mass production; and the preparation process of the Fe(OH)3 colloidal particle / graphene oxide composite material has obvious solution variation, and the solution becomes turbid from clear and finally precipitates, so that the supernate can be directly poured out.

Description

technical field [0001] The invention relates to a sol electrostatic self-assembly method for preparing Fe 3 o 4 Methods and uses of nanoparticle and graphene composites. Background technique [0002] As a two-dimensional sheet structure material, graphene and metal oxide nanoparticles are combined to produce composite materials, which have attracted extensive attention due to their unique structure and properties. At present, the main methods to obtain graphene-based composite materials are: mechanical mixing and chemical methods to directly grow additional materials on graphene sheets to form composite materials. Although the mechanical blending method is simple to operate, the uniformity of the prepared composite material is not good due to the difference in the density of the graphene phase and the metal oxide particles; the growth of the second material on the graphene sheet requires a complex chemical preparation process and the composition of the composite material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01G49/08B82Y30/00C01B32/192
Inventor 刘玉山张建民曾沙付磊丁洁刘铁柱闫小舍姜小青
Owner ZHENGZHOU UNIV
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