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Preparation method of spinel-type magnetic MFe2O4/graphene composite material

A spinel-type, composite material technology, applied in the direction of graphene, nickel oxide/nickel hydroxide, zinc oxide/zinc hydroxide, etc., can solve the problems of complex process and difficult agglomeration, and achieve simple process and dispersibility Good, structurally stable effect

Inactive Publication Date: 2012-10-24
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, currently based on magnetic MFe 2 o 4 / The research on graphene composite materials has just started, and the prepared process is complicated and the prepared MnFeO 4 Easy to reunite and other characteristics, so looking for a simple preparation of pure phase, not easy to reunite, high magnetization magnetic MFe 2 o 4 / Graphene composite method becomes a research hotspot

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  • Preparation method of spinel-type magnetic MFe2O4/graphene composite material
  • Preparation method of spinel-type magnetic MFe2O4/graphene composite material

Examples

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Embodiment 1

[0024] Spinel-type magnetic MFe 2 o 4 / The preparation process of graphene composite material (M=Mn), the operation process is as follows:

[0025] The first step: Add 0.9g of graphite oxide to 300mL of distilled aqueous solution, and ultrasonically disperse for 30 minutes to obtain a uniform graphene oxide dispersion;

[0026] The second step: 0.52g of Mn(CH 3 COO) 2 4H 2 O and 1.72g Fe(NO) 3 9H 2 O dissolved in 25mL water (Mn 2+ and Fe 2+ The molar ratio is 1:2), join in the graphene oxide dispersion liquid, fully stir and mix to obtain mixed liquid;

[0027]Step 3: Use 10% sodium hydroxide solution to adjust the pH value of the mixture to >10, add 15 mL of 50% hydrazine hydrate under constant stirring, and fully react at a constant temperature of 80-150°C for 4 hours;

[0028] Step 4: The product is separated by centrifugation or magnetic, washed with distilled water or absolute ethanol in sequence, dried and ground;

[0029] Step 4: The ground sample is calcined ...

Embodiment 2

[0031] The difference from Example 1 is that in this example, in step 2, 0.52g of Mn(CH 3 COO) 2 4H 2 O was replaced by 0.467g of Zn(CH 3 COO) 2 2H 2 O, operation steps and other requirements are all identical with embodiment 1. After purification, the spinel magnetic ZnFe 2 o 4 / graphene composites.

Embodiment 3

[0033] The difference from Example 1 is that in this example, in step 2, 0.52g of Mn(CH 3 COO) 2 4H 2 O, replaced by 0.617g Ni(NO 3 ) 2 ·6H 2 O, operation steps and other requirements are all identical with embodiment 1. After purification, the spinel magnetic NiFe 2 o 4 / graphene composites.

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Abstract

The invention discloses a preparation method of a spinel-type magnetic MFe2O4 / graphene composite material. The preparation method utilizes a water-soluble metal M<2+> salt and a Fe<3+> salt as precursors and graphite oxide as a matrix and comprises the following steps of carrying out ultrasonic dispersion of graphite oxide in ethanol or water as a solvent to obtain a graphene oxide dispersion, adding a M<2+> salt and Fe<3+> salt-containing aqueous solution having a M<2+> / Fe<3+> mole ratio of 1: 2 into the graphene oxide dispersion, fully stirring to obtain a mixed solution, adjusting a pH value of the mixed solution to a value more than 10 by an alkali liquor, adding a reducing agent into the mixed solution, stirring at a temperature of 80 to 150 DEG C for a reaction lasting for 4 to 10 hours, after the reaction is finished, carrying out separation, washing, drying and grinding, and carrying out calcination of the grinded powder at a temperature of 300 DEG C in a nitrogen or argon atmosphere for 2 to 10 hours. Magnetic MFe2O4 nano particles of the spinel-type magnetic MFe2O4 / graphene composite material have high loading capacity, stable structures, good uniformity, good dispersibility and strong adhesion with graphene. The spinel-type magnetic MFe2O4 / graphene composite material can be widely used in the fields of magnetic targeting materials and other related function materials.

Description

1. Technical field [0001] The invention relates to the technical field of graphene material processing and application, in particular to spinel magnetic MFe 2 o 4 / The preparation method of graphene composite material. 2. Background technology [0002] Graphene, as a member of the carbon family, is composed of carbon atoms through sp 2 Hybrid, composed of a single-layer honeycomb two-dimensional grid structure. Graphene is the building block that makes up other carbon allotropes. In 2004, Geim, professor of physics at the University of Manchester in the United Kingdom, used adhesive tape to repeatedly peel off highly oriented pyrolytic graphite to obtain stable graphene. The discovery immediately attracted the attention of physicists, chemists and material scientists, and set off another research boom after fullerenes and carbon nanotubes. As a unique two-dimensional crystal, graphene has very excellent properties. If the specific surface area is large, the theoretical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01G49/02C01G45/02C01G53/04C01G9/02C01B32/184
Inventor 姚运金杨则恒张大伟
Owner HEFEI UNIV OF TECH
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