Fe3O4-Au magnetic nano composite material, and preparation method and application thereof

A fe3o4-au, magnetic nanotechnology, applied in the preparation of organic compounds, preparation of amino hydroxyl compounds, nanotechnology, etc., can solve the problems affecting the performance of magnetic cores and cumbersome steps

Active Publication Date: 2014-02-26
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is cumbersome, the coated inorganic or polymer shell affects the performance of the magnetic core, and the surface needs further chemical modification

Method used

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  • Fe3O4-Au magnetic nano composite material, and preparation method and application thereof
  • Fe3O4-Au magnetic nano composite material, and preparation method and application thereof
  • Fe3O4-Au magnetic nano composite material, and preparation method and application thereof

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preparation example Construction

[0021] The embodiment of the present invention provides a kind of Fe 3 o 4 -The preparation method of Au magnetic nanocomposite material, the flow process of its preparation method is as follows figure 1 shown, including the following steps:

[0022] S01. Preparation of Fe in oil phase 3 o 4 nanoparticles;

[0023] S02. Using 2,3-dimercaptosuccinic acid to convert Fe 3 o 4 Nanoparticles are transferred from the oil phase to the water phase: the above oil phase Fe 3 o 4 The nanoparticles were dispersed in an organic solvent, and the organic solution of 2,3-dimercaptosuccinic acid was added to the oil phase Fe 3 o 4 Nanoparticles undergo surface ligand exchange reaction. After the reaction is completed, the product is washed with organic solvent, water and adjusted pH in sequence to obtain the aqueous phase Fe 3 o 4 Dispersions;

[0024] S03. Using "one-step method" to prepare Fe 3 o 4 -Au magnetic nanocomposite: the above aqueous phase Fe 3 o 4 After the disper...

Embodiment 1

[0045] a kind of Fe 3 o 4 -The preparation method of Au magnetic nanocomposite material, comprises the steps:

[0046]S11. Weigh 0.353g of iron acetylacetonate and 1.12g of dodecyl alcohol and dissolve it in 5ml of benzyl ether, and add 2ml of oleic acid and 2ml of oleyl ammonium into it, mix well and vacuumize at room temperature for one hour. Then, the temperature was raised to 200° C. under the condition of argon, and kept at this temperature for 2 hours, and then the temperature was gradually raised to 300° C., and kept at this temperature for 1 hour. After the reaction, cool to room temperature, add a certain amount of ethanol and n-hexane to wash in turn, repeat this step 3 times, and obtain an oil phase Fe with a diameter of about 10nm. 3 o 4 nanoparticles.

[0047] S12. the above-mentioned oil phase Fe 3 o 4 The nanoparticles were dispersed in 8 ml of chloroform to form Fe 3 o 4 Chloroform dispersion, take 1ml Fe 3 o 4 Add an equal volume of acetone to precip...

Embodiment 2

[0050] a kind of Fe 3 o 4 -The preparation method of the Au magnetic nanocomposite material is basically the same as the steps of the above-mentioned embodiment 1, the difference is: in the S21 step of the present embodiment, the organic ether solvent is 5ml of phenyl ether; The temperature should be raised to 265°C for the second time; the oil phase Fe obtained after the reaction 3 o 4 The diameter of nanoparticles is about 6nm.

[0051] That is, the specific operation of S21 is as follows:

[0052] Weigh 0.353g of iron acetylacetonate and 1.12g of dodecyl alcohol and dissolve it in 5ml of phenyl ether, and add 2ml of oleic acid and 2ml of oleyl ammonium to it, mix well and vacuumize at room temperature for one hour. Then, the temperature was raised to 200° C. under the condition of argon, and kept at this temperature for 2 hours, and then the temperature was gradually raised to 265° C., and kept at this temperature for 1 hour. After the reaction, cool to room temperatur...

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Abstract

The invention discloses a Fe3O4-Au magnetic nano composite material, and a preparation method and an application thereof. The preparation method of the Fe3O4-Au magnetic nano composite material comprises the following steps: preparing oil-phase Fe3O4 nano particles; taking 2,3-dimercaptosuccinic acid as a phase transfer modifier, thus obtaining water-soluble Fe3O4 nano particles; and adding a reducing agent and taking chloroauric acid as the raw material to synthesize the Fe3O4-Au magnetic nano composite material through one step in the aqueous solution of Fe3O4. The preparation method is characterized in that small-particle size gold nano particles can be generated on the surface of the Fe3O4 transformed into the water phase from the oil phase through one step, the gold nano particles do not need to be extra synthesized and purified, and therefore, the experiment step is simplified and the particles obtained are even in size. In the meantime, the Fe3O4-Au magnetic nano composite material obtained by the preparation method can be applied to catalysis, biological detection, cell separation and targeted drug delivery.

Description

technical field [0001] The invention relates to the technical field of nanocomposite materials, in particular to a Fe 3 o 4 -Au magnetic nanocomposite material and its preparation method and application. Background technique [0002] With the rapid development of modern science and technology, single-functional materials are difficult to meet the needs of practical applications, and composite materials with multiple properties have emerged as the times require. The emergence of nanocomposites has broadened people's horizons and provided the possibility for the preparation of high-end multifunctional materials. In addition to superparamagnetic properties, magnetic nanocomposites can also incorporate properties such as fluorescence, enhanced optics, or catalytic activity. Therefore, these materials have become the focus of research in biomedical fields such as medical imaging, drug delivery, and immunoassays. . [0003] Among many magnetic nanoparticles, Fe with particle s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89H01F1/11B82Y30/00C07C213/02C07C215/76
Inventor 粟武敖丽娇黄亮
Owner SHENZHEN INST OF ADVANCED TECH
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