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Method for preparing soft magnetic mesoporous nickel-zinc ferrite microspheres

A technology of nickel-zinc ferrite and microspheres, which is applied in the field of preparation of mesoporous magnetic microspheres, can solve the problems of difficult particle size, shape and structure, high requirements for reaction conditions, low reproducibility, etc. Low cost, high safety factor, and good application value

Inactive Publication Date: 2012-07-04
ZHONGBEI UNIV
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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 solve the existing method for preparing soft magnetic mesoporous nickel-zinc ferrite microspheres with cumbersome steps, high requirements for reaction conditions, difficulty in controlling the size, morphology and structure of particles, and low reproducibility, etc. However, it provides a new method for the preparation of soft magnetic mesoporous nickel-zinc ferrite microspheres with low cost, simple operation, mild and pollution-free reaction conditions, easy control of the process, repeatability and amplification, and high yield and yield. method

Method used

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  • Method for preparing soft magnetic mesoporous nickel-zinc ferrite microspheres

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Embodiment 1

[0035] A method for preparing soft magnetic mesoporous nickel-zinc ferrite microspheres, comprising the steps of:

[0036] (1) Dissolve glucose in deionized water to prepare a glucose solution with a mass concentration of 0.1g / ml, transfer the prepared glucose solution to a high-pressure reactor, and conduct a hydrothermal reaction at 180°C for 8 hours, and then transfer to In a high-speed centrifuge, and at a speed of 16000rpm, separate for 10min to obtain solid C microspheres;

[0037] (2) Take NiCl 2 ·6H 2 O, ZnCl 2 ·6H 2 O and FeCl 3 ·6H 2 O and be dissolved in ethylene glycol together, fully stir 40min, then add ammonium acetate, fully stir again 30min, finally obtained orange cloudy liquid, the molar concentration ratio of metal salt ion in this orange cloudy liquid is Ni 2+ :Zn 2+ :Fe 3+ =1:1:4, the amount of ammonium acetate added is 0.05g / ml;

[0038] (3) Take the C microspheres obtained in step (1) and dissolve them in the orange turbid solution obtained in ...

Embodiment 2

[0050] A method for preparing soft magnetic mesoporous nickel-zinc ferrite microspheres, comprising the steps of:

[0051] (1) Dissolve glucose in deionized water to prepare a glucose solution with a mass concentration of 0.05g / ml, transfer the prepared glucose solution into a high-pressure reactor, and conduct a hydrothermal reaction at 190°C for 10 hours, and then transfer to In a high-speed centrifuge, and separated at a speed of 16,000rpm for 5min, the solid C microspheres were finally obtained;

[0052] (2) Take NiCl 2 ·6H 2 O, ZnCl 2 ·6H 2 O and FeCl 3 ·6H 2 O and be dissolved in ethylene glycol together, fully stir 30min, then add ammonium acetate again, fully stir 35min again, finally obtained orange cloudy liquid, the molar concentration ratio of metal salt ion in this orange cloudy liquid is Ni 2+ :Zn 2+ :Fe 3+ =1:1:4, the amount of ammonium acetate added is 0.025g / ml;

[0053] (3) Take the C microspheres obtained in step (1) and dissolve them in the orange ...

Embodiment 3

[0061] A method for preparing soft magnetic mesoporous nickel-zinc ferrite microspheres, comprising the steps of:

[0062] (1) Dissolve glucose in deionized water to prepare a glucose solution with a mass concentration of 0.15g / ml, transfer the prepared glucose solution to a high-pressure reactor, and conduct a hydrothermal reaction at 200°C for 12 hours, and then transfer to In a high-speed centrifuge, and at a speed of 17,000 rpm, separate for 8 minutes to obtain solid C microspheres;

[0063] (2) Take NiCl 2 ·6H 2 O, ZnCl 2 ·6H 2 O and FeCl 3 ·6H 2 O and be dissolved in ethylene glycol together, fully stir 35min, then add ammonium acetate, fully stir again 40min, finally obtained orange cloudy liquid, the molar concentration ratio of metal salt ion in this orange cloudy liquid is Ni 2+ :Zn 2+ :Fe 3+ =1:1:4, the amount of ammonium acetate added is 0.01g / ml;

[0064] (3) Take the C microspheres obtained in step (1), and dissolve them in the orange turbid solution obt...

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Abstract

The invention discloses a method for preparing soft magnetic mesoporous nickel-zinc ferrite microspheres and overcomes the disadvantages that steps are fussy, the requirements of reaction conditions are high, the size, morphology and structure of particles are difficult to control, and the reproducibility is low in the conventional method. The method comprises the following steps of: performing hydrothermal reaction on a glucose solution which is taken as a raw material, and centrifuging at high speed to obtain C microspheres; matching the C microspheres which are taken as a template with ammonium acetate, Ni salt, Zn salt and Fe salt in a glycol environment to obtain nickel-zinc ferrite-C precursor composite microspheres; and finally, removing the C microsphere template from the nickel-zinc ferrite-C precursor composite microspheres through calcination to obtain a residual product, namely the soft magnetic mesoporous nickel-zinc ferrite microspheres. The method is low in cost and high in yield and productivity, is easy to operate, can repeat and amplify, can be applied to the fields of medicine carriers, electromagnetic shielding, nano-magnetic packing and the like, and has good potential application value, reaction conditions are mild and pollution-free, and the process is easy to control.

Description

technical field [0001] The invention relates to a method for preparing magnetic microspheres with mesoporous structure, in particular to a method for preparing soft magnetic mesoporous nickel-zinc ferrite microspheres. Background technique [0002] Due to the characteristics of magnetism and mesoporous structure, mesoporous magnetic microspheres have important applications in the fields of carriers (such as drug carriers). In recent years, research on targeted drugs has begun to rise, and mesoporous magnetic microspheres have also become one of the hot spots in nanomaterial science. [0003] Nickel-zinc-ferrite microspheres are an important soft magnetic nanomaterial. Because of their large internal cavity, high saturation magnetization, low coercive force and remanence, soft magnetic mesoporous nickel-zinc-ferrite Somatic microspheres will be used as a good carrier in the research of targeted drugs. At present, the preparation methods of soft magnetic mesoporous nickel-zi...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 酒红芳张立新韩涛李同川王苏孙益新付跃华王瑗钟
Owner ZHONGBEI UNIV
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