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Preparation method of carbon coated magnetic nano-spherical iron sulfide

A magnetic nanometer and iron sulfide technology, which is applied in the preparation of microspheres, the magnetic properties of inorganic materials, and the preparation of microcapsules, can solve the problems of high reaction temperature, complicated process and equipment, and achieve the effect of simple process and good stability.

Inactive Publication Date: 2012-09-19
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is only a preparation method to ensure its stability by coating Fe7S8 with carbon nanotubes, but the reaction temperature is too high, and the process and equipment are too complicated (Chinese patent, CN201010532478.0)

Method used

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  • Preparation method of carbon coated magnetic nano-spherical iron sulfide
  • Preparation method of carbon coated magnetic nano-spherical iron sulfide
  • Preparation method of carbon coated magnetic nano-spherical iron sulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Mix 1 gram of ferrocene and 2 grams of ammonium persulfate evenly, put them into a 50 milliliter pressure bomb lined with p-polyphenylene in a glove box under a nitrogen protective atmosphere, and lock and seal it. Heat the pressure melting bomb to 200°C, keep it warm for 1 hour and then cool to room temperature. The obtained black flocculent powder was cleaned and dried with deionized water and absolute ethanol to obtain 0.69 g of carbon-coated nano-spherical Fe 7 S 8 powder.

Embodiment 2

[0031] Mix 3 grams of ferrocene and 8 grams of ammonium persulfate evenly, put them into a 50 milliliter pressure bomb lined with p-polyphenylene in a glove box under a nitrogen protective atmosphere, and lock and seal. Heat the pressure melting bomb to 200°C, keep it warm for 2 hours and then cool to room temperature. The obtained black flocculent powder was cleaned and dried with deionized water and absolute ethanol to obtain 2.46 grams of carbon-coated nano-spherical Fe 7 S 8 powder.

Embodiment 3

[0033] 2 grams of ferrocene and 4 grams of ammonium persulfate were evenly mixed, and placed in a pressure-dissolving bomb with a volume of 50 milliliters of p-polyphenyl lined in a glove box under a nitrogen protective atmosphere and locked and sealed. Heat the pressure melting bomb to 150°C, keep it warm for 4 hours and then cool to room temperature. The obtained black flocculent powder was cleaned and dried with deionized water and absolute ethanol to obtain 1.54 grams of carbon-coated nano-spherical Fe 7 S 8 powder.

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Abstract

The invention discloses a preparation method of carbon coated magnetic nano-spherical iron sulfide (Fe7S8) powder; ferrocene and derivatives of the ferrocene are further reacted with ammonium persulfate in one step to prepare carbon coated nano-spherical iron sulfide Fe7S8 powder. The magnetic nano Fe7S8 particle prepared by the method is spherical, the diameter is intensively distributed between 10 nm to 50nm, a coated carbon shell has a graphitizing carbon structure, and the thickness is intensively distributed between 5 nm to 20nm. The preparation method provided by the invention has the characteristics of simple equipment, easy operation, low cost, high efficiency, environmental protection and the like, and is suitable for industrial production; the prepared carbon coated magnetic nano-spherical Fe7S8 powder is good in stability, and the method has wide application prospects in the fields of environmental depollution, drug targeting, absorbing materials and the like.

Description

technical field [0001] The invention relates to a carbon-coated magnetic nano-spherical iron sulfide (Fe 7 S 8 ) method of powder preparation. Background technique [0002] Affected by the complex geological environment in nature, and the sulfur and iron elements that make up iron sulfides have relatively rich valence states, each type of iron sulfide can undergo changes in composition and crystal structure under the influence of temperature , so there are a wide variety of naturally occurring iron sulfides. The iron sulfide minerals whose crystal structure has been proven and clarified are divided into the following types according to the ratio between Fe and S elements, as shown in Table 1. Among them, pyrrhotite and equiaxed pyrolite, which show magnetism under the action of an external magnetic field, are the most concerned by people, not only because these two compounds are closely related to the circulation of the biosphere and the earth's magnetism, but more import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02H01F1/01
Inventor 刘伯洋
Owner SHANGHAI MARITIME UNIVERSITY
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