Magnetic hollow microsphere and preparation method and application thereof

A hollow, magnetic technology, applied in the direction of nanomagnetism, metal processing equipment, nanotechnology for materials and surface science, etc., can solve the problems of unsuitable industrial production and application, strict requirements for instrument accuracy, strong template dependence, etc. problems, to achieve the effect of novel structure and formation mechanism, low requirements for instrument precision, and simple production equipment

Active Publication Date: 2021-02-02
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned patent documents mainly use the template-assisted method to prepare magnetic hollow microspheres, the preparation method is highly dependent on the template, the steps are cumbersome, and the accuracy of the instrument is strict and time-consuming, so it is not suitable for industrial production and application.

Method used

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  • Magnetic hollow microsphere and preparation method and application thereof
  • Magnetic hollow microsphere and preparation method and application thereof
  • Magnetic hollow microsphere and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A method for preparing magnetic hollow microspheres, specifically comprising the steps of:

[0057] Dissolve 1.065g of stearic acid and 1.05g of hexadecylamine in 70mL of 1,2-propanediol, stir at 75°C for 1h, then add 0.75g of Co(OAc) 2 4H 2 O, continue stirring for 30min to form purple solution A; then 0.375g Cu(OAc) 2 ·H 2 Dissolve O in 10mL 1,2-propanediol, stir at 60°C for 30min to form a blue solution B; then add solution B to solution A, stir for 5min and transfer to a 100mL polytetrafluoroethylene-lined reactor, 200°C Heating and reacting for 15 hours, naturally cooling to room temperature, washing with absolute ethanol three times, drying in a vacuum oven at 60°C, and finally obtaining magnetic hollow microspheres.

[0058] The composition, phase, morphology and static magnetic properties of the obtained product measured under energy spectrum, XRD, scanning electron microscope and VSM are as follows: Figure 1~4 shown.

[0059] From the above analysis, it c...

Embodiment 2

[0062] Compared with the preparation steps disclosed in Example 1, the only difference is that the Co(OAc) added by the reaction 2 4H 2 O, Cu(OAc) 2 ·H 2 The mass ratio of O is half of that in Example 1, and the rest of the preparation steps and process parameters are the same.

[0063] The composition, phase and morphology of the obtained product measured under energy spectrum, XRD and scanning electron microscope are as follows: Figure 6-8 shown. The analysis shows that the product is a uniform, monodisperse flower-like Co / Cu nanostructure. Wherein, the sashimi length of the flower-like Co / Cu nanostructure is about 67-238 nm, and the atomic ratio of Cu / Ni is 0.023.

Embodiment 3

[0065] Compared with the preparation steps disclosed in Example 1, the only difference is that the Co(OAc) added by the reaction 2 4H 2 O, Cu(OAc) 2 ·H 2 The mass ratio of O is 6 times that in Example 1, and the rest of the preparation steps and process parameters are the same.

[0066] The composition, phase and morphology of the obtained product measured under energy spectrum, XRD and scanning electron microscope are as follows: Figures 9 to 11 shown. Analysis shows that the product is a homogeneous, monodisperse hollow microsphere. Wherein, the diameter of the hollow microsphere is 2.2-4.1 μm, and the Cu / Ni atomic ratio is 0.030.

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Abstract

The invention discloses a magnetic hollow microsphere and a preparation method and application thereof, and belongs to the technical field of nano materials. The magnetic hollow microsphere prepared by a one-step hydrothermal method is novel in structure and formation mechanism, and the content of Cu and Co in the product and the composition, morphology and structure of the magnetic hollow microsphere can be regulated and controlled by changing the reaction temperature, time, surfactant ratio, mass ratio of copper salt to cobalt salt and reactant concentration; and the diameter of the preparedmagnetic hollow microsphere is 2.2 microns-10.2 microns, and the magnetic hollow microsphere is widely applied to the fields of microwave absorption and shielding, electro-catalysis, lithium ion batteries, surface enhanced Raman spectroscopy and the like due to good dispersity and uniformity and good microwave absorption characteristics. The preparation method is simple to operate, green and environment-friendly, has good industrial application potential, and is suitable for market popularization and application.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and relates to a simple method for preparing magnetic hollow microspheres; more specifically, it relates to a magnetic hollow microsphere and its preparation method and application. Background technique [0002] In recent years, magnetic metal and alloy nanomaterials have been widely used in ultra-high density information storage, catalysis, giant magnetoresistance, magneto-optic materials, microwave absorbing materials, ferrofluids and biomedicine due to their excellent electrical, magnetic and catalytic properties. etc. have shown great application prospects. [0003] Since morphology is an important factor determining performance, hollow nanomaterials are widely used in nano-devices, sensors, energy, Storage and energy conversion and other fields have important application prospects. At present, the main technologies for preparing magnetic hollow microspheres include in-situ co-depositi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B22F1/02B82Y25/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B82Y25/00B22F1/0553B22F1/07B22F1/0655B22F1/054B22F1/17
Inventor 童国秀刘敏敏范宝新季然吴丽珊兰应棋吴文华
Owner ZHEJIANG NORMAL UNIVERSITY
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