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Making method for magnetic kernel medium hole hollow ball

A technology of mesoporous hollow spheres and hollow spheres, applied in the directions of inorganic material magnetism, silicon oxide, etc., can solve the problems of limited, unsuitable for a large number of synthesis costs, difficult to operate and yield, and achieves the effect of simple operation, intuitive and large output, and large output.

Inactive Publication Date: 2008-08-06
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method determines that the condition control of the synthesis process requires strict control, is not easy to operate and has limited output, and is not suitable for large-scale synthesis and cost reduction.
[0003] In order to solve the above problems, the "vacuum nano casting method" proposed by us overcomes the above shortcomings, and there is no similar report at home and abroad.

Method used

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  • Making method for magnetic kernel medium hole hollow ball
  • Making method for magnetic kernel medium hole hollow ball
  • Making method for magnetic kernel medium hole hollow ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] According to literature reports, polystyrene microspheres were used to prepare hollow spheres with a shell structure of mesoporous silica MCM-41. Mesoporous hollow spheres with other structures are also similar. Prepare 25 mL of 1.0 mol / L ferric nitrate solution in a beaker with hydrated ferric nitrate, then add 0.3 g of mesoporous hollow spheres, and stir with a glass rod for 1 minute to form a cloudy solution. Put the beaker with ferric nitrate turbid solution into the vacuum box, and vacuumize (10 -1 Pa), and maintain the vacuum condition for 5 minutes. Then open the vacuum valve, adjust the vacuum box to atmospheric pressure, and it can be seen that all the hollow balls sink into the bottom of the bottle because the cavity is injected into the ferric nitrate solution. Stay in this state for 5 minutes. Then take out the beaker and suck out the ferric nitrate solution, leaving the hollow ball precipitate that has been injected with the ferric nitrate solution in th...

Embodiment 2

[0031] Described according to technological process (with embodiment example 1), adopt the ferric nitrate ethanol solution of 0.5mol / L, can make the ferric nitrate that contains a certain amount 2 o 3 Nuclear mesoporous hollow spheres (Figure 2). After subsequent heat treatment, magnetic Fe can be obtained 3 o 4 The mesoporous hollow spheres of the core (Fig. 4 and Fig. 6) have a magnetic size of 7.2 emu / g.

Embodiment 3

[0033] Described according to technological process (with embodiment example 1), adopt the ferric nitrate ethanolic solution of 0.25mol / L, can make the ferric nitrate that contains a certain amount 2 o 3 Nuclear mesoporous hollow spheres (Figure 2). After subsequent heat treatment, magnetic Fe can be obtained 3 o 4 The mesoporous hollow spheres of the core (Fig. 5 and Fig. 6) have a magnetic size of 2.2 emu / g.

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Abstract

The invention provides a preparation method for a magnetic inner core meso-porous hollow ball, wherein, the quantity of magnetic inner cores can be effectively controlled through control of the concentration of iron source solution and the ambient air pressure, thereby regulation and control of magnetism of the meso-porous hollow ball provided with the magnetic inner cores are realized. The preparation method for the magnetic inner core meso-porous hollow ball is simple in preparation conditions and easy to operate and can be mass produced. The invention belongs to the inorganic nanophase material synthesis field.

Description

technical field [0001] The invention relates to a method for preparing a mesoporous hollow sphere with a magnetic inner core, in particular to a method for preparing a mesoporous silicon dioxide hollow sphere with a magnetic inner core by vacuum nano casting, and belongs to the field of synthesis of inorganic nanomaterials. technical background [0002] In recent years, great progress has been made in the synthesis of mesoporous hollow spheres. Mesoporous hollow spheres have great advantages in the diffusion and transport of substances because of the controllable cavity size and the regular mesoporous channels interconnected inside and outside. In addition, because magnetic nanoparticles have great application prospects in nuclear magnetic resonance imaging, magnetic carriers of drug delivery systems, and biomarkers, the synthesis and application of magnetic nanoparticles have become a research hotspot in recent years. Based on the regular channels of mesoporous materials, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/10C01B33/113B22F9/00
Inventor 郭利明施剑林李静波崔香枝陈振兴
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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