Preparation method of CoFe2O4-at-MCM-48 magnetic mesoporous material of core shell structure

A technology of mesoporous materials and core-shell structure, which is applied in the field of preparation of magnetic mesoporous materials with core-shell structure CoFe2O4@MCM-48, can solve the problems of harsh synthesis conditions, high energy consumption and high cost, and achieve unique magnetic characteristics, The effect of large specific surface area and mild conditions

Inactive Publication Date: 2018-03-02
GUANGXI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The current hydrothermal synthesis method is the magnetic composite material CoFe 2 o 4 The main method of @MCM-48 molecular sieve, but the hydrothermal method has a long preparation cycle and high energy consumption, which leads to the current magnetic composite material CoFe 2 o 4 The preparation cost of @MCM-48 molecular sieve is high, and the magnetic composite material CoFe 2 o 4 The preparation process of @MCM-48 is very cumbersome, the synthesis conditions are very harsh, and the synthesis time is long
[0005] There are following problems in the prior art: (1) magnetic composite material CoFe 2 o 4 The preparation process of @MCM-48 is very cumbersome, the synthesis conditions are very harsh, and the synthesis time is long, so simplifying the preparation process is the technical problem that this paper wants to solve; (2) The hydrothermal synthesis method is the current magnetic composite material CoFe 2 o 4 The main method of @MCM-48 molecular sieve, the hydrothermal method has a long preparation cycle, a large consumption of template agent, high energy consumption and high cost
These disadvantages limit the wide application of magnetic mesoporous composites to some extent.

Method used

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  • Preparation method of CoFe2O4-at-MCM-48 magnetic mesoporous material of core shell structure
  • Preparation method of CoFe2O4-at-MCM-48 magnetic mesoporous material of core shell structure
  • Preparation method of CoFe2O4-at-MCM-48 magnetic mesoporous material of core shell structure

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preparation example Construction

[0044] A kind of CoFe with core-shell structure provided by the invention 2 o 4 The preparation method of @MCM-48 magnetic mesoporous material comprises the following steps:

[0045] S1, take CoFe 2 o 4 Dissolve in chloroform, ultrasonic 10 ~ 20min, to get a mixed solution;

[0046] S2, take the mixed solution obtained in S1 and add it to the aqueous solution containing cetyltrimethylammonium bromide, continue ultrasonic stirring for 3-8 minutes, raise the temperature of the solution to 50-70°C, and then continue to evaporate for 1-3 minutes , a solution of ferrite particles was obtained; the cetyltrimethylammonium bromide used in S2 was combined with the CoFe used in S1 2 o 4 The ratio is 0.0005mol:0.1g;

[0047] S3, take the ferrite particle solution obtained in S2 and add it to cetyltrimethylammonium bromide-ethylene glycol-water solution, and stir for 5-15 minutes; then add ammonia water to adjust the pH to 11, and then add absolute ethanol, Continue to stir; then a...

Embodiment 1

[0051] A kind of CoFe with core-shell structure 2 o 4 The preparation method of @MCM-48 magnetic mesoporous material, the specific steps are as follows:

[0052] S1, take 0.2g ferrite CoFe 2 o 4 Dissolve in 3ml of chloroform, 400W ultrasound for 15min, to get a mixed solution; CoFe is used here 2 o 4 nanoparticles;

[0053] S2, take half the volume of the mixed solution obtained in S1 and add it to 25ml of 0.8g / 100ml cetyltrimethylammonium bromide (CTAB) aqueous solution (that is, add 0.0005molCTAB), continue 400W ultrasonic stirring for 5min, and The temperature of the solution was raised to 60°C, and then continued to evaporate for 2 minutes to remove the organic chloroform. At this time, a surfactant-stabilized ferrite particle solution was obtained, and the ferrite particles showed hydrophilicity;

[0054] S3, take the ferrite particle solution obtained in S2 and add it to 62g of cetyltrimethylammonium bromide-ethylene glycol-water solution, stir for 10min; then add ...

Embodiment 2

[0058] A kind of CoFe with core-shell structure 2 o 4 The preparation method of @MCM-48 magnetic mesoporous material, the specific steps are the same as in Example 1, the only difference is the CoFe used in S1 2 o 4 The mass is 0.1g.

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Abstract

The invention belongs to the technical field of magnetic composite material synthesis, and concretely discloses a preparation method of a CoFe2O4-at-MCM-48 magnetic mesoporous material of a core shellstructure. Ferrite CoFe2O4 particles and mesoporous molecular sieves MCM-48 are combined; the materials are roasted in a muffle furnace at 450 to 650 DEG C; the CoFe2O4-at-MCM-48 magnetic mesoporousmaterial of the core shell structure is obtained. The method provided by the invention has the advantages that the cost is low; the toxicity is low; the operation is simple and convenient; the conditions are mild; the time consumption is short; the prepared material has magnetic performance and has mesoporous pore passages of the molecular sieves; huge prospects are realized in the aspects of adsorption separation and medicine carriers.

Description

technical field [0001] The technical field of magnetic composite materials of the present invention, specifically relates to a kind of CoFe with core-shell structure 2 o 4 @MCM-48 Preparation method of magnetic mesoporous materials. Background technique [0002] CoFe 2 o 4 Particles have many excellent physical and chemical properties, such as high resistivity, high coercive force, moderate saturation magnetization, and good magnetic spectrum characteristics, and are active in various fields such as optics, magnetism, and electricity, and are important multifunctional materials. Material. Mesoporous material MCM-48 molecular sieve has unique structural characteristics, such as large specific surface area, uniform pore size, three-dimensional helical surface channel structure, good long-range periodicity and stable skeleton structure, etc., and is active in adsorption and separation, catalytic reactions, pharmaceuticals, etc. Release control and semiconductor materials, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/04C01G49/00B82Y40/00
CPCB82Y40/00C01B39/04C01G49/0018C01P2002/72C01P2004/01C01P2004/03C01P2004/04C01P2004/62C01P2004/82C01P2006/12C01P2006/14C01P2006/17C01P2006/42
Inventor 何云杜香霖王云龙林卿杨虎
Owner GUANGXI NORMAL UNIV
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