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
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[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...
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[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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