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Method for preparing ferromagnetic metal simple-substance microsphere having flower-shaped layering nanostructure

A technology of nanostructure and simple metal, applied in the direction of magnetism of inorganic materials, can solve the problems of high cost, unfavorable large-scale production, complicated preparation process, etc., and achieve the effect of regular crystal form, uniform size and low cost

Inactive Publication Date: 2009-04-15
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing ferromagnetic metal elemental microspheres with flower-like hierarchical nanostructures, which overcomes the disadvantages of high cost and complicated preparation process that are not conducive to large-scale production in the existing preparation methods

Method used

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  • Method for preparing ferromagnetic metal simple-substance microsphere having flower-shaped layering nanostructure
  • Method for preparing ferromagnetic metal simple-substance microsphere having flower-shaped layering nanostructure
  • Method for preparing ferromagnetic metal simple-substance microsphere having flower-shaped layering nanostructure

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Experimental program
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Embodiment 1

[0034] In this embodiment, cobalt elemental microspheres with a flower-like hierarchical structure are prepared, and the steps and conditions are as follows:

[0035] 1) CoCl 2 Dissolve in 30ml ethylene glycol, stir well to form CoCl 2 A clear solution with a concentration of 0.067 mol / l, i.e. the first solution;

[0036] 2) Add 0.5 gram of cetyltrimethylammonium bromide (CTAB) into the first solution, and fully stir to form the second solution;

[0037] 3) Add the hydrazine hydrate solution with a concentration of 40% (v / v) dropwise into the second solution, and fully stir to form the third solution; wherein, the volume of the hydrazine hydrate solution is 5ml;

[0038] 4) Transfer the third solution obtained above into a closed reaction vessel, and keep it warm for 4 hours under the condition of 200° C. to obtain a precipitate;

[0039] 5) Finally, the precipitate obtained in the above step 4) is washed with deionized water and dried to obtain flower-like hierarchical cob...

Embodiment 2

[0042] Except step 1) use cobalt nitrate (Co(NO) in the present embodiment 3 ) 2 ), or cobalt sulfate (CoSO 4 ), or cobalt acetate Co(CH 3 COO) 2 Any of the alternatives to cobalt chloride (CoCl 2 ), other steps and conditions are the same as in Example 1, and the flower-like hierarchical structure cobalt elemental microspheres can also be obtained.

[0043] The electron spectrum data of the cobalt sample prepared in this embodiment are as Figure 5 As shown, the results show that the sample only contains Co element, and it can be determined that the prepared sample is a simple substance of metallic cobalt.

Embodiment 3

[0045] In this embodiment, except step 2) using cetyltrimethylammonium chloride (CTAC), or sodium dodecylbenzenesulfonate (SDBS), or polyvinylpyrrolidone (PVP), or tetrabutyl bromide Except that any one of ammonium (TBAB) replaces cetyltrimethylammonium bromide (CTAB), other steps and conditions are the same as in Example 1, and flower-like hierarchical cobalt elemental microspheres can also be obtained.

[0046] The X-ray diffraction spectrum (XRD) of the cobalt sample prepared by the present embodiment is as follows Figure 7As shown, the five obvious characteristic diffraction peaks correspond to the (100), (002), (101), (102) and (110) crystal planes of cobalt, which are closely related to the hexagonal packing (hcp) phase of cobalt (JCPDS No.05-0727) are basically the same. In addition, no other miscellaneous peaks were observed, indicating that the prepared sample was a pure hexagonal cobalt metal element.

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Abstract

The invention provides a method for preparing a ferromagnetic metal simple substance microsphere with a floriform hierarchical nanostructure, which comprises the following steps: adding dissoluble bivalent ferromagnetic metal salt into ethylene glycol solution, dissolving the dissoluble bivalent ferromagnetic metal salt through stirring to form first solution; weighing certain amount of surfactant to be dissolved in the first solution, fully stirring the mixture to form second solution; adding hydrazine hydrate with certain concentration into the second solution to obtain third solution through complex reaction; and then, placing the third solution in an airtight reaction vessel, keeping the temperature to obtain depositions; and finally, washing and drying the depositions so as to obtain the ferromagnetic metal simple substance microsphere with the floriform hierarchical nanostructure. The ferromagnetic metal simple substance microsphere with the floriform hierarchical nanostructure prepared by the method has the advantages of even size, regular crystal form, low cost of required raw materials, and no need of nitrogen protection in the preparation process; and the homogeneous ferromagnetic metal simple substance microsphere with the floriform hierarchical nanostructure can be obtained at relatively low temperature (between 200 and 220 DEG C). Besides, the method has the advantages of simple process, mass preparation and application to large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a ferromagnetic metal elemental microsphere with a flower-like layered nanostructure. Background technique [0002] Ferromagnetic metals are an important class of soft magnetic materials, mainly iron-group metals in the 3d transition group metals, namely Fe, Co, Ni, which are widely used in electronic devices, information storage, catalysis and other fields. With the development of technology, it is found that when the size of the material reaches the micro-nano scale, it often exhibits different physical and chemical properties from the bulk material, so it has attracted more and more attention. In recent years, micro-nano magnetic materials have been widely used in magnetic storage, superfluid, sensing, drug delivery, etc. [0003] Since the ferromagnetism of Fe, Co, and Ni comes from its roaming 3d electrons, and its saturation magnetic moment is determined by the energy band structure, when the part...

Claims

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Application Information

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IPC IPC(8): B22F9/24H01F1/06
Inventor 朱路平
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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