Preparation method of spinel ferrite hollow sphere with core-shell structure

A technology of shell structure and spinel, which is applied in the field of preparation of spinel ferrite hollow spheres, can solve the problems of difficult surface modification, difficulty of hollow spheres, layer-by-layer coating, etc., and achieves convenient operation and simple preparation process , The effect of low raw material cost
CN101774646AActive Publication Date: 2010-07-14INST OF PROCESS ENG CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF PROCESS ENG CHINESE ACAD OF SCI
Publication Date
2010-07-14

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Abstract

The invention relates to a preparation method of a spinel ferrite hollow sphere with a core-shell structure. Carbon spheres are used as templates. The method comprises the following steps of: firstly, using a hydrothermal method to manufacture the carbon sphere templates at 80-210 DEG C; then, dispersing the carbon spheres in a high-concentration metal salt solution to absorb metal ions; and finally, carrying out thermal treatment on the metal ions with carbon spheres in the air so as to remove the carbon spheres to obtain the spinel ferrite hollow sphere with the core-shell structure. Because the method omits the steps of layer-by-layer coating and multi-time modification, the method has short technical process and convenient operation.
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Description

technical field

[0001] The invention belongs to the technical field of functional materials, in particular to a method for preparing spinel ferrite hollow spheres with a core-shell structure. Background technique

[0002] Spinel ferrite, generally refers to MFe 2 o 4 (M=Zn, Ni, Co, Cd, etc.), is an important magnetic material, and has important applications in electronic devices, information storage, magnetic response imaging, drug delivery, etc. Nano- or micron-scale ferrite hollow spheres have unique physical and chemical properties due to their low density, large specific surface area, hollow structure, and shells composed of nanoparticles, so hollow spheres with this core-shell structure are widely used. It is used in applications related to surface properties, such as catalysts in many reaction processes, absorbents for eliminating toxic gases, and sensor materials in gas-sensitive systems. In addition, it is also used in photonic crystals, diagnostics, and pharmacolo...

Claims

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