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Method for preparing nano ferrate in fused salt manner

A technology of ferrite and molten salt method, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of poor product crystallinity, increased cost and environmental pollution, and achieve rich product types and short reaction time , highly controllable effect

Active Publication Date: 2013-02-13
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that the crystallinity of the product is not good, and organic solvents and surfactants are needed, which not only increases the cost but also easily causes environmental pollution

Method used

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  • Method for preparing nano ferrate in fused salt manner
  • Method for preparing nano ferrate in fused salt manner
  • Method for preparing nano ferrate in fused salt manner

Examples

Experimental program
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Embodiment 1）

[0035] This example is MgFe 2 o 4 Preparation method of nanospheres:

[0036] Put 1mmol magnesia, 2mmol ferric nitrate, 100mmol sodium chloride, 10mmol potassium chloride to grind, mix evenly, put the mixture in an alumina crucible, then put the alumina crucible into a tube furnace, press 5°C / min Raise the temperature to 820°C and bake for 4 hours.

[0037] Cool naturally to ambient temperature (0-40°C, the same below), immerse in distilled water to remove salt, filter with suction, wash, and dry at 70°C to obtain MgFe 2 o 4 nanospheres.

[0038] The MgFe 2 o 4 The X-ray diffraction pattern of the nanospheres is shown in figure 1 ,Depend on figure 1It can be seen that the X-ray diffraction peak position of this product is consistent with the standard X-ray diffraction card (JCPDS 36-0398), which proves that the product obtained in this example is pure phase MgFe 2 o 4 powder.

[0039] The MgFe 2 o 4 The field emission scanning electron microscope image of the nano...

Embodiment 2）

[0042] This example is PbFe 2 o 4 Preparation method of nanospheres:

[0043] Put 2mmol lead carbonate, 4mmol ferric nitrate, 100mmol sodium chloride, 10mmol potassium chloride to grind, mix evenly, place the mixture in an alumina crucible, then put the alumina crucible into a tube furnace, pass in an inert gas, and Under the protection of inert gas, the temperature was raised to 840°C at a rate of 5°C / min, and calcined for 4h.

[0044] Naturally cool to ambient temperature, impregnate with distilled water to remove salt, filter, wash, and dry at 60°C to obtain PbFe with a particle size of 800nm ​​to 1000nm 2 o 4 nanospheres.

[0045] Control the molar ratio of divalent metal to ferric iron to be 1:2, the molar ratio of raw material to molten salt to be 3:11y (0.6≤y2 o 4 , SnFe 2 o 4 nanospheres.

Embodiment 3）

[0047] This example is Ni 0.6 Fe 2.4 o 4 Preparation method of nanospheres:

[0048] Put 0.6mmol nickel nitrate, 2.4mmol ferric nitrate, 80mmol sodium chloride, 8mmol potassium chloride to grind, mix evenly, put the mixture in an alumina crucible, then put the alumina crucible into a tube furnace, press 5°C The temperature was raised to 860°C at a rate of 1 / min, and roasted for 6h.

[0049] Naturally cooled to ambient temperature, soaked in distilled water to remove salt, filtered, washed, and dried at 60°C to obtain Ni 0.6 Fe 2.4 o 4 nanospheres.

[0050] The Ni 0.6 Fe 2.4 o 4 The field emission scanning electron microscope image of the nanosphere is shown in image 3 ,Depend on image 3 It can be seen that the product has a spherical shape with a diameter of about 600nm to 1100nm, Ni 0.6 Fe 2.4 o 4 The yield of nanospheres was about 80 wt%.

[0051] Control the molar ratio of divalent metal and ferric iron to x:3-x (0.01≤xx Fe 3-x o 4 、Cu x Fe 3-x o 4 、Cd...

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Abstract

The invention discloses a method for preparing nano ferrate in a fused salt manner. The method comprises the following steps of grinding and uniformly mixing a divalent metal compound serving as a raw material, a ferric iron compound serving as a raw material, sodium chloride serving as fused salt and potassium chloride as fused salt, putting the mixture in a crucible, putting the crucible into a tubular furnace, and roasting for 4-6 hours at 800-880 DEG C, and carrying out aftertreatment to obtain nano ferrate, wherein the mole ratio of the raw materials to the fused salt is 3:11y and y is not less than 0.6 and not larger than 50; the mole ratio of the divalent metal compound to the ferric iron compound is x:3-x and x is not less than 0.01 and not larger than 1; and the mole ratio of sodium chloride to potassium chloride in the fused salt is 10:1. The method for preparing nano ferrate in a fused salt manner, disclosed by the invention, has the advantages of simpleness in equipment, short reaction time, low energy consumption, environment friendliness, low cost and product diversity, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a method for preparing ferrite, in particular to a method for preparing nanometer ferrite by a molten salt method. Background technique [0002] As a soft magnetic material, spinel ferrite has been widely used in mutual inductance devices and magnetic recording materials. At present, with the development of technology, the scope of practical application of spinel ferrite is becoming wider and wider. For example, as a catalyst, it can be applied to the oxidation deoxygenation reaction of synthetic ammonia and butene. It has been found that when the size of the material reaches the nanometer range, it will have different properties from the bulk material. For example, Kobe University in Japan used ferrite nanospheres as drug carriers to successfully treat liver cancer and kidney cancer. This shows that ferrite can be used as a carrier of anticancer drugs and has a good prospect in medicine. Therefore, the synthesis and properti...

Claims

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Application Information

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IPC IPC(8): C01G49/00B82Y30/00
Inventor 娄正松
Owner JIANGSU UNIV OF TECH
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