Metal alloy-metal oxide double magnetic shell-core structure nanocrystal and preparation method and application thereof

A shell-core structure and metal alloy technology, applied in the field of nanomaterials, can solve the problems of cumbersome operation process, waste of reagents and consumables, etc., and achieve the effects of simple process, expansion of magnetic properties, and small size

Active Publication Date: 2018-10-26
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires multi-step synthesis, and the synthetic product of each step needs to be purified, the operation process is cumbersome and wastes reagent consumables

Method used

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  • Metal alloy-metal oxide double magnetic shell-core structure nanocrystal and preparation method and application thereof
  • Metal alloy-metal oxide double magnetic shell-core structure nanocrystal and preparation method and application thereof
  • Metal alloy-metal oxide double magnetic shell-core structure nanocrystal and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1, FePt@Fe 3 o 4 Preparation of Core-Shell Nanocrystals

[0063] Add 0.5mmol of platinum acetylacetonate, 1.5mmol of 1,2-hexadecanediol and 20mL of 1-octadecene into a 150mL three-necked flask, stir and mix evenly with a magnetic force at 1600rpm / min, vacuumize at 40°C for 30min, blow nitrogen, and add 1.6 mL oleic acid, 1.7 mL oleylamine, and 3 mmol iron acetylacetonate (platinum acetylacetonate: 1,2-hexadecanediol: iron acetylacetonate: oleic acid: oleylamine: 1-octadecene in a ratio of 1:3:6 :10:10:62.5), evacuate at 80°C for 30min, blow nitrogen, raise the temperature to 300°C, and reflux for 30min. Remove the heat source, cool to room temperature, then add an appropriate amount of ethanol, centrifuge at 6000r / min for 10min, take the precipitate, then add an appropriate amount of cyclohexane to dissolve the product, centrifuge again at 6000r / min for 10min, take the upper layer, and repeat ethanol The process of precipitation / cyclohexane dispersion was ...

Embodiment 2

[0066] Embodiment 2, FePt@Fe 3 o 4 Preparation of Core-Shell Nanocrystals

[0067] Add 0.1mmol of platinum acetylacetonate, 0.3mmol of 1,2-hexadecanediol and 20mL of 1-octadecene into a 150mL three-necked flask, stir and mix evenly with a magnetic force at 1600rpm / min, vacuumize at 40°C for 30min, blow nitrogen, and add 1.6 mL oleic acid, 1.7 mL oleylamine, and 2 mmol iron acetylacetonate (platinum acetylacetonate: 1,2-hexadecanediol: iron acetylacetonate: oleic acid: oleylamine: 1-octadecene in a ratio of 1:3:20 :50:50:312.5), vacuumize at 80°C for 30min, blow nitrogen, raise the temperature to 300°C, and reflux for 30min. Remove the heat source, cool to room temperature, then add an appropriate amount of ethanol, centrifuge at 6000r / min for 10min, take the precipitate, then add an appropriate amount of cyclohexane to dissolve the product, centrifuge again at 6000r / min for 10min, take the upper layer, and repeat ethanol The process of precipitation / cyclohexane dispersion w...

Embodiment 3

[0070] Embodiment 3, FePt@Fe 3 o 4 Preparation of Core-Shell Nanocrystals

[0071] Add 0.3mmol of platinum acetylacetonate, 0.9mmol of 1,2-hexadecanediol and 20mL of 1-hexadecene into a 150mL three-necked flask, stir and mix evenly with a magnetic force at 1600rpm / min, vacuumize at 40°C for 30min, blow nitrogen, and add 1.6 mL oleic acid, 1.7 mL oleylamine, and 3 mmol iron acetylacetonate (platinum acetylacetonate: 1,2-hexadecanediol: iron acetylacetonate: oleic acid: oleylamine: 1-octadecene in a ratio of 1:3:10 :16.7:16.7:104.2), vacuumize at 80°C for 30min, pass nitrogen gas, heat up to 300°C, and reflux for 30min. Remove the heat source, cool to room temperature, then add an appropriate amount of ethanol, centrifuge at 6000r / min for 10min, take the precipitate, then add an appropriate amount of cyclohexane to dissolve the product, centrifuge again at 6000r / min for 10min, take the upper layer, and repeat ethanol The process of precipitation / cyclohexane dispersion was per...

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Abstract

The invention discloses metal alloy-metal oxide double magnetic shell-core structure nanocrystal and a preparation method and application thereof. The metal alloy-metal oxide double magnetic shell-core structure nanocrystal comprises a core region and a shell layer, and the core region is wrapped with the shell layer. The core region is made of a metal alloy, and the shell layer is made of a metaloxide. The preparation method comprises the following steps that a precursor of the metal alloy and a precursor of the metal oxide are mixed in the same reaction vessel under the protection of an inert atmosphere, and an oil phase high temperature thermal decomposition method is adopted for reaction to obtain the metal alloy-metal oxide double magnetic shell-core structure nanocrystal. The metalalloy-metal oxide double magnetic shell-core structure nanocrystal is synthesized by a one-pot synthesis method, a shell-core structure can be adjusted from the size and shape, and shell-core double magnetic nanocrystal with different compositions can be further synthesized in general. The metal alloy-metal oxide double magnetic shell-core structure nanocrystal has the characteristics of simpleness, high efficiency and low cost, and mass synthetic metal alloy-metal oxide double magnetic shell-core structure nanocrystal with good monodispersity and super-controllable magnetic properties can beprepared.

Description

technical field [0001] The invention relates to a metal alloy-metal oxide double magnetic core-shell structure nanocrystal and a preparation method and application thereof, belonging to the technical field of nanomaterials. Background technique [0002] With the miniaturization of magnetic devices, the research of bimagnetic magnetic nanoparticles as the final structural unit has attracted more and more attention. At present, most research methods use the seed-generation method to prepare dual magnetic nanomaterials, that is, a nanocrystal is pre-synthesized, and then the nanocrystal is used as a seed to regenerate heterostructure nanoparticles. However, this method requires multi-step synthesis, and the synthetic product of each step needs to be purified, the operation process is cumbersome and wastes reagent consumables. Contents of the invention [0003] The purpose of the present invention is to provide a metal alloy-metal oxide double magnetic shell-core structure na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F1/00B22F9/24B82Y30/00B82Y40/00H01F1/01H01F41/00
CPCH01F1/01H01F41/00B82Y30/00B82Y40/00B22F9/24B22F1/07B22F1/16
Inventor 姚立柴亚红
Owner INST OF CHEM CHINESE ACAD OF SCI
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