Superfine high-dispersion super-paramagnetism ferrate nano particles and preparation method thereof

A nanoparticle and superparamagnetic technology, which is applied in the field of ultrafine and highly dispersed superparamagnetic ferrite nanoparticles and its preparation, can solve the problems of high synthesis temperature and high cost of raw materials, and achieve low reaction temperature, simple operation, small size Narrow distribution effect

Inactive Publication Date: 2012-07-18
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the cost of raw materials used in this method is high, the synthesis temperature is high, and a larg

Method used

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  • Superfine high-dispersion super-paramagnetism ferrate nano particles and preparation method thereof
  • Superfine high-dispersion super-paramagnetism ferrate nano particles and preparation method thereof
  • Superfine high-dispersion super-paramagnetism ferrate nano particles and preparation method thereof

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Example Embodiment

[0031] Example 1:

[0032] The following examples further illustrate the present invention:

[0033] First, the anhydrous FeCl 3 (1.13g) and MgCl 2 (0.075g) was dissolved in absolute ethanol (70ml) to form an ethanol solution of ferric chloride and magnesium chloride. Under magnetic stirring, 2mL of oleic acid was added to the ethanol solution. Then add the prepared 10mL NaOH ethanol solution to the ethanol solution of ferric chloride and magnesium chloride (the amount of sodium hydroxide added = the valence state of metal ions × the amount of metal chloride added, the two metal ions Mg 2+ With Fe 3+ Calculate separately and add them together), mix thoroughly for 1h under magnetic stirring, and then introduce into a polytetrafluoroethylene reactor for solvothermal reaction. The temperature of the solvothermal reaction is 150°C and the solvothermal time is 2h. After the mixed solution was cooled to room temperature (25°C), it was centrifuged and ultrasonically washed. After being v...

Example Embodiment

[0038] Example 2

[0039] The difference from Example 1 is that the ultrafine and highly dispersed superparamagnetic zinc ferrite nanoparticles are prepared by the method provided by the present invention, and the product particles are characterized by transmission electron microscopy as fully crystallized, spherical, highly dispersed, and the average particle size is approximately 5.9nm, uniform size distribution cubic spinel structure Zn 0.45 Fe 2.37 O 4 Nanoparticles have a saturation magnetization of 29.3emu / g under an external magnetic field with a temperature of 300K and a magnetic induction intensity of 1T. They are suitable for biomedical applications including cell labeling, hyperthermia, and magnetic resonance imaging.

Example Embodiment

[0040] Example 3

[0041] The difference from Example 1 is that the ultrafine and highly dispersed superparamagnetic manganese ferrite nanoparticles are prepared by the method provided by the present invention. The product particles are characterized by transmission electron microscopy as being fully crystallized, spherical, highly dispersed, and the average particle size is approximately 3.5nm, uniform size distribution cubic spinel structure Mn 0.11 Fe 2.52 O 4 Nanoparticles have a saturation magnetization of 57emu / g under an external magnetic field with a temperature of 300K and a magnetic induction intensity of 1T. They are suitable for biomedical applications including cell labeling, hyperthermia, and magnetic resonance imaging.

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Abstract

The invention belongs to the technical field of nano magnetic materials, and particularly relates to superfine high-dispersion super-paramagnetism ferrate nano particles and a preparation method thereof. The nano particles are apparently high-dispersion spherical particles, the average particle size is a few nanometers, and the nano particles are uniform in size distribution, and each particle has a cubic spinel structure. Anhydrous metal chloride, ethanol, oleic acid and sodium hydroxide are used as reactive raw materials, and are subjected to solvent thermal reaction to obtain pure crystallized nano ferrite powder. According to the preparation method, NaCl crystals which are automatically generated through reaction at room temperature are coated on nano-crystals, so that the nano-crystals are restricted to continuously grow up during solvent thermal reaction. Moreover, the aim of dispersing the nano particles is fulfilled by using a steric hindrance of the oleic acid to the nano particles; and the saturation magnetization of a product is changed by using different proportions of doping ions and iron ions in the raw materials. The superfine high-dispersion super-paramagnetism ferrate nano particles are suitable for biomedical application such as cell marking, heat treatment, magnetic resonance imaging and the like.

Description

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Claims

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Application Information

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IPC IPC(8): C01G49/00H01F1/047B82Y40/00
Inventor 唐文书李琦高世安尚建库
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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