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Preparing method of FePt/graphene composite nano materials

A graphene composite and nano-material technology, applied in the field of nano-materials, can solve problems such as easy agglomeration and affecting performance, and achieve the effects of simple synthesis steps, reduced production costs, and special and controllable morphology

Inactive Publication Date: 2014-04-09
WUHAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

However, FePt nanoparticles are easy to agglomerate in the absence of surfactants, and the addition of surfactants affects their performance.
[0003] In addition, the morphology of FePt nanomaterials prepared by chemical methods mainly includes spherical, square, nanorods and nanowires, etc., and flower-like nanostructures assembled from FePt nanoparticles have not been reported yet.

Method used

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  • Preparing method of FePt/graphene composite nano materials
  • Preparing method of FePt/graphene composite nano materials
  • Preparing method of FePt/graphene composite nano materials

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Weigh 20 mg of graphene oxide, place it in 10 mL of deionized water for ultrasonic dispersion, and obtain a uniform aqueous solution of graphene oxide A; weigh 0.0985 g of platinum acetylacetonate and 0.0883 g of iron acetylacetonate, and place mL of ethylene glycol, heated under magnetic stirring to dissolve, respectively, to obtain transparent solution B and transparent solution C; add solution C dropwise to solution B, and stir for 15 min to obtain solution D; then add solution A dropwise to In solution D, after stirring for 30 min, transfer to a 50 mL polytetrafluoroethylene reactor, and react at 160°C for 24 hours. After the reaction was completed, it was naturally cooled to room temperature, and the obtained product was alternately centrifuged and washed three times with absolute ethanol and deionized water, and then dried in a vacuum oven at 60° C. for 4 hours to obtain the FePt nanoflower / graphene composite material. The speed of centrifugation is 10000 rpm, and...

Embodiment 2

[0036] Weigh 50 mg of graphene oxide, place it in 10 mL of deionized water for ultrasonic dispersion, and obtain a uniform aqueous solution A of graphene oxide. Weigh 0.0985 g of platinum acetylacetonate and 0.0883 g of iron acetylacetonate, place them in 15 mL of ethylene glycol, and heat to dissolve under magnetic stirring to obtain transparent solution B and transparent solution C respectively; Add solution B and stir for 15 minutes to obtain solution D; then add solution A dropwise to solution D, stir for 30 minutes, transfer to a 50 mL polytetrafluoroethylene reactor, and react at 160°C for 24 hours. After the reaction was finished, it was naturally cooled to room temperature, and the obtained product was alternately centrifuged and washed three times with absolute ethanol and deionized water, and then dried in a vacuum oven at 60° C. for 4 hours to obtain the FePt nanoparticle / graphene composite material. The speed of centrifugation is 10000 rpm, and the time is 5 minute...

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Abstract

The invention provides a preparing method of FePt / graphene composite nano materials, which includes the following steps: (1) placing graphene oxides into deionized water for ultrasonic dispersion to obtain even water solution A of the graphene oxides; (2) preparing glycol solution D mixed with acetylacetone platinum alloy and acetylacetone iron alloy; (3) dropwise adding the solution A into the solution D and stirring to obtain solution E, wherein concentration of the graphene oxides in the solution E is 0.5g / L or 1.25g / L, and concentration of acetylacetone platinum alloy and acetylacetone iron alloy is respectively 6.25mmol / L; (4) transferring the solution E to a Teflon reaction kettle for reacting for 24 hours at temperature of 160 DEG C to obtain reaction products; and (5) washing the products in centrifugation mode and drying the products to obtain the FePt / graphene composite nano materials. Reagents used in the preparing method are normally used, the preparing method is simple in synthetic steps, low in cost, free of pollution and easy to achieve industrial production, no surface active agents or extra reducing agents are needed to be added, synthesized products are specific and controllable in shapes and appearance, and agglomeration of FePt nano particles can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a method for preparing FePt / graphene composite nanomaterials. Background technique [0002] FePt nanomaterials have two crystal structures: superparamagnetic face-centered cubic (fcc) and ferromagnetic face-centered tetragonal (fct or L10). FePt with Fcc structure has broad application prospects in the fields of magnetic separation, magnetically targeted drug carriers, hyperthermia and medical imaging agents, and new catalysts. However, FePt nanoparticles are easy to agglomerate in the absence of surfactant, and the addition of surfactant affects its performance. [0003] In addition, the morphology of FePt nanomaterials prepared by chemical methods mainly includes spherical, square, nanorods and nanowires, etc., and flower-like nanostructures assembled from FePt nanoparticles have not been reported yet. Contents of the invention [0004] The purpose of the present inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 吴庆知陈丹符新宁李倩刘熹
Owner WUHAN UNIV OF TECH
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