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Method for synthesizing series single-dispersed ferrite nanometer magnetic beads

A nano-magnetic bead, monodisperse technology, applied in the field of synthesis of ferrite nano-magnetic beads, can solve problems such as insufficient dispersion and uneven product size distribution, and achieve large performance control space, uniform product morphology, and good performance. good control effect

Inactive Publication Date: 2008-06-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the particle size of the product is small, the size distribution of the product is not uniform, and the dispersion is not good enough, so it is easy to agglomerate

Method used

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  • Method for synthesizing series single-dispersed ferrite nanometer magnetic beads
  • Method for synthesizing series single-dispersed ferrite nanometer magnetic beads
  • Method for synthesizing series single-dispersed ferrite nanometer magnetic beads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take 16mmol of FeCl3 , added to a 50 ml hydrothermal kettle, 40 ml of ethylene glycol solution was added to the kettle, after dissolving, heated at 200°C for 72 hours, the obtained black precipitate was washed with deionized water, dried at 40-80°C, and prepared Ferric oxide nano-magnetic beads with a particle diameter of 100-1000 nanometers are obtained.

[0037] Reduce FeCl 3 The usage amount is up to 2mmol, and a similar product is prepared through the same process;

[0038] Ferric sulfate, ferric nitrate, and ferric acetate are used to replace ferric chloride, and similar products are obtained through the same process.

Embodiment 2

[0040] Take 8mmol of manganese chloride and 16mmol of FeCl 3 Added to 50 ml of water heating kettle, at this time Mn 2+ with Fe 3+ The molar ratio is 1:2. Add 40 ml of ethylene glycol solution to the kettle, stir and heat at 250°C for 18 hours, wash the obtained precipitate with deionized water, and dry it at 40-80°C to obtain MnFe 2 o 4 nano magnetic beads.

[0041] Control the molar ratio of divalent metal ions to iron ions to be 1:2, the same process is applicable to Ni 2+ , Cu 2+ , Zn 2+ , Cd 2+ , Pb 2+ , Sn 2+ , Ca 2+ ,Sr 2+ , Ba 2+ , Cd 2+ , Mg 2+ ,Co 2+ The reaction of soluble salts of divalent metal ions and soluble ferric ion salts, finally forming NiFe 2 o 4 , CuFe 2 o 4 , ZnFe 2 o 4 , CdFe 2 o 4 , PbFe 2 o 4 , SnFe 2 o 4 , CaFe 2 o 4 , SrFe 2 o 4 , BaFe 2 o 4 , CdFe 2 o 4 , MgFe 2 o 4 , CoFe 2 o 4 and other ferrite nano-magnetic beads.

Embodiment 3

[0043] Weigh 0.08mmolMnCl 2 and 16mmol of FeCl 3 , added to a 50 ml water heating kettle, at this time Mn 2+ with Fe 3 + of

[0044] The molar ratio is 0.01:2, add 40 ml of ethylene glycol solution to the kettle, heat at 300°C for 8 hours, wash the obtained precipitate with deionized water, and dry it at 40-80°C to obtain Mn x Fe 3-x o 4 Manganese ferrite compound nano magnetic beads.

[0045] control Mn 2+ The molar ratio to iron ions is x:2, where 0.01

[0046] Control the molar ratio of divalent metal ions to iron ions to be x: 2, where 0.12+ , Cu 2+ , Zn 2+ , Cd 2+ , Pb 2+ , Sn 2+ , Ca 2+ ,Sr 2+ , Ba 2+ , Cd 2+ , Mg 2+ ,Co 2+ The reaction of soluble salts of divalent metal ions and soluble ferric ion salts, and finally the formation of Ni x Fe 3-x o 4 , Cu x Fe 3-x o 4 , Zn x Fe 3-x o 4 , Cd x Fe 3-x o 4 , Pb x Fe 3-x o 4 , Sn x Fe 3-x o 4 , Ca x Fe 3-x o ...

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Abstract

The invention takes ferric ion salt as raw material, which is taken solvent thermal reaction under 200-300deg.C to form Fe3O4 nanometer magnetic bead. At same reaction condition, through adding one or more kind of divalent soluble metal ion salt to make reaction with ferric ion salt and controlling the level of addition, the mol ration between the divalent soluble metal ion salt and ferric ion, the ferrite nanometer magnetic bead and the compound ferric ion nanometer magnetic bead are formed.

Description

technical field [0001] The invention relates to a method for synthesizing ferrite nano-magnetic beads, which belongs to the technical field of inorganic material preparation technology. Background technique [0002] As a soft magnetic material, spinel ferrite has been widely used in mutual inductance devices, magnetic core bearings and magnetic recording materials. At present, with the development of technology, the scope of practical application of spinel ferrite is becoming more and more extensive. For example, it has been practically used as a catalyst in the oxidative dehydrogenation of ammonia and butene. In recent years, it has been found that when the size of materials reaches the nanoscale stage, different properties from bulk materials often appear. Recently, Kobe University School of Medicine in Japan used nano ferrite magnetic beads to treat liver cancer and kidney cancer successfully. This shows that ferrite can be used as an anticancer drug carrier and has a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02B22F9/16B82B3/00
Inventor 李亚栋邓洪
Owner TSINGHUA UNIV
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