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Prepn process of monodisperse nanometer Fe-Pt alloy particle

A nano-alloy, monodisperse technology, applied in the field of materials, can solve the problems of harsh equipment technical requirements, expensive raw materials, and highly toxic iron pentacarbonyl, and achieve the effects of convenient and simple product processing, narrow particle size distribution, and stable reaction system.

Inactive Publication Date: 2007-01-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods all have problems such as harsh equipment and technical requirements, expensive raw materials, high cost, and iron pentacarbonyl is highly toxic and dangerous.

Method used

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  • Prepn process of monodisperse nanometer Fe-Pt alloy particle
  • Prepn process of monodisperse nanometer Fe-Pt alloy particle
  • Prepn process of monodisperse nanometer Fe-Pt alloy particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Fully dissolve 0.000031mol of chloroplatinic acid and 0.0000625mol (1:2) ferrous chloride tetrahydrate in 2ml of absolute ethanol, add 0.1g of sodium oleate and 2mg of diphenyl crown ether, and oscillate ultrasonically for 10 minutes .

[0028] 2. Accurately measure 3ml of 1,2-propanediol and 1ml of oleic acid to fully mix, add to the system of step (1), ultrasonicate for 10 minutes, make it fully mixed, and then add the entire mixed system into the reaction autoclave , heated at 120°C for 15 hours. After the reaction, wash the particles with ethanol for 3-5 times, and centrifuge at 5000 rpm for 10 minutes to obtain the desired product with a particle size of 10-15nm. Finally, the particles can be redispersed in absolute ethanol or chloroform. from figure 1 , figure 2 The existence of the product can be clearly seen in the TEM electron microscope photos shown.

Embodiment 2

[0030] 1. Fully dissolve 0.000031 mol of chloroplatinic acid and 0.000125 mol (1:4) ferric oxalate in 4 ml of absolute ethanol, add 0.1 g of sodium oleate and 2 mg of diphenyl crown ether, and oscillate ultrasonically for 15 minutes.

[0031] 2. Accurately measure 2ml of 1,2-propanediol and 1ml of oleic acid to fully mix, add to the system of the first step, ultrasonicate for 10 minutes to make it fully mixed, and then add the entire mixed system to the reaction autoclave together, Heated at 140°C for 10 hours. After the reaction, the particles were washed with ethanol for 3-5 times, and centrifuged at 3500 rpm for 15 minutes. The desired product is obtained, and its particle size is 2-6nm. Finally, the particles can be redispersed in absolute ethanol or chloroform. from image 3 The existence of the product can be clearly seen in the TEM electron microscope photos shown.

Embodiment 3

[0033] 1. Fully dissolve 0.000031 mol of chloroplatinic acid and 0.0000625 mol (1:2) ferrous chloride tetrahydrate in 3 ml of ethylene glycol, add 0.1 g of sodium oleate and 2 mg of diphenyl crown ether, and oscillate ultrasonically for 12 minutes.

[0034] 2. Accurately measure 3ml of 1,2-propanediol and 1ml of oleic acid to fully mix, add to the system of step (1), ultrasonicate for 10 minutes, make it fully mixed, and then add the entire mixed system into the reaction autoclave , heated at 120°C for 13 hours. After the reaction, the particles are washed with ethanol for 3-5 times, and centrifuged at 3000 rpm for 20 minutes to obtain the desired product with a particle size of 2-7nm. Finally, the particles can be redispersed in absolute ethanol or chloroform. from Figure 4 The existence of the product can be clearly seen in the TEM electron microscope photos shown.

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Abstract

The present invention relates to material technology, and is especially preparation process of monodisperse nanometer Fe-Pt alloy particle. The reaction precursor of Pt containing inorganic salt or complex and Fe containing inorganic salt or complex, organic solvent and phase catalyst diphenyl crown ether are reacted to produce phase transfer and coreduction of the precursor inside a high pressure autoclave with oleic acid as stabilizer at 120-150 deg.c for 8-15 hr, so as to form the monodisperse nanometer Fe-Pt alloy particle of particle size 2-15 nm. The said process has controllable and narrowly distributed particle size, stable reaction system, simple operation, convenient product treatment, low cost and easy industrial application.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing monodisperse iron-platinum alloy nanoparticles. Background technique [0002] L1 0 The iron-platinum alloy of the structure has high uniaxial magnetic crystal anisotropy, which is very suitable for the preparation of ultra-high-density magnetic storage media materials, so it has a good application prospect in magnetic recording media and micro-devices. And compared with pure platinum, iron-platinum alloy has superior electrochemical catalytic activity in methanol-sulfuric acid system. In this way, the development of iron-platinum alloy materials with a certain shape and specific size has become a key issue in the application of new magnetic materials. However, nanometer-sized iron-platinum particles can exhibit more prominent electrochemical, magnetic, and optical properties, especially the giant magnetoresistance effect of iron-platinum all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 亓海全温鸣李鲁江鄂克佳
Owner TONGJI UNIV
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