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Preparation method of radial magnetic core-shell mesoporous silicon material with phenyl functionalization

A core-shell mesoporous and radial technology, applied in chemical instruments and methods, inorganic chemistry, alkali metal compounds, etc., can solve problems such as uneven distribution of organic groups, few types of organic groups, content of blocked channels, etc., to achieve beneficial The effect of industrial production, low cost, high adsorption capacity

Active Publication Date: 2014-10-01
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

PMOs solve the problems of uneven distribution of organic groups, blocked pores and low content, and are a new synthetic method
But since (EtO) 3 Si–R–Si(OEt) 3 There are few types of silicon sources and they are difficult to obtain, so there are fewer types of organic groups introduced

Method used

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  • Preparation method of radial magnetic core-shell mesoporous silicon material with phenyl functionalization
  • Preparation method of radial magnetic core-shell mesoporous silicon material with phenyl functionalization
  • Preparation method of radial magnetic core-shell mesoporous silicon material with phenyl functionalization

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Experimental program
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Embodiment 1

[0036] The specific operation steps for the preparation of phenyl-functionalized radial magnetic core-shell mesoporous silicon materials are as follows:

[0037] (1) Preparation of Fe3O4 nanospheres

[0038] Dissolve 6.08 g of ferric chloride hexahydrate and 1.87 g of sodium citrate dihydrate in 100 mL of ethylene glycol, and stir at 1000 rpm for 1 h at 30 °C. Add 7.51 g of anhydrous sodium acetate, transfer the above mixed solution into a reaction kettle, raise the temperature from room temperature to 200 °C for 2 hours, and keep the temperature for 6 hours. After the reaction, the reaction kettle was naturally cooled to room temperature, the product was washed three times with ethanol and deionized water, and dried overnight at 60°C in an ordinary drying oven to obtain black ferric oxide nanospheres, ferric oxide nanospheres The average particle size of the ball is 200±26 nm;

[0039] (2) Preparation of Fe3O4 nanoparticles

[0040] Mix 120 mL of ethanol, 20 mL of water an...

Embodiment 2

[0046] (1) Preparation of Fe3O4 nanospheres

[0047] Adopt the preparation step (1) and synthesis conditions of the above-mentioned embodiment 1;

[0048] (2) Preparation of Fe3O4 nanoparticles

[0049] Mix 50 mL of ethanol, 5 mL of water and 1 mL of 0.5 mol / L potassium hydroxide solution (KOH) to obtain a mixed solution, and add 0.1 to 1.0 g of ferric oxide nanospheres to the mixed solution; Add 1.5 mL tetraethyl orthosilicate (TEOS) dropwise, and react for 5 hours under the condition of a water bath at a temperature of 45°C. After the reaction, the solution was poured into a beaker, the product was separated from the solution with a magnet, and washed three times alternately with ethanol and deionized water. The product was dried overnight in an oven to obtain ferric oxide nanoparticles (Fe 3 o 4 / SiO 2 );

[0050] (3) Preparation of solution A and solution B

[0051] Adopt the preparation step (3) and synthetic conditions of the above-mentioned embodiment 1;

[0052...

Embodiment 3

[0055] (1) Preparation of Fe3O4 nanospheres

[0056] Adopt the preparation step (1) and synthesis conditions of the above-mentioned embodiment 1;

[0057] (2) Preparation of Fe3O4 nanoparticles

[0058] Mix 250 mL of ethanol, 50 mL of water and 10 mL of 28% ammonia water to obtain a mixed solution, add 0.1 to 1.0 g of ferric oxide nanospheres to the mixed solution; slowly add 1.5 mL of orthosilicic acid dropwise after ultrasonication for 10 min Ethyl ester (TEOS) was reacted for 5 hours in a water bath at a temperature of 45°C. After the reaction, the solution was poured into a beaker, the product was separated from the solution with a magnet, and washed three times alternately with ethanol and deionized water. The product was dried overnight in an oven to obtain ferric oxide nanoparticles (Fe 3 o 4 / SiO 2 );

[0059] (3) Preparation of solution A and solution B

[0060] Adopt the preparation step (3) and synthetic conditions of the above-mentioned embodiment 1;

[006...

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PUM

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Abstract

The invention relates to a preparation method of a radial magnetic core-shell mesoporous silicon material with phenyl functionalization. The preparation method is characterized in that a magnetic ferroferric oxide nano ball is used as a core, and under the condition of the improved co-condensation method, radial magnetic core-shell mesoporous silicon can be easily prepared; by changing the proportion of a phenyl-alkoxyl silicon source to a silicate ester silicon source, the density of fiber thorns on the magnetic core-shell mesoporous silicon can be conveniently adjusted and controlled. Compared with a traditional synthesis method, the preparation method has the advantages that the process and the equipment are simple, and the controllability is high; the material is novel in shape, good in dispersity, low in cost, possible in batch preparation, and wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of magnetic material preparation, and in particular relates to a preparation method of a phenyl-functionalized magnetic core-shell mesoporous silicon material with a radial structure. Background technique [0002] As an important class of functional materials, magnetic materials have broad application prospects in the separation of environmentally harmful substances, catalysis, information storage, bioimaging, and drug delivery. Among them, iron-based magnetic materials, such as Fe3O4, are favored by many researchers at home and abroad because of their high saturation magnetization, easy synthesis technology, and controllable size and shape. However, Fe 3 o 4 Nanoparticles have disadvantages such as easy agglomeration in solution, and easy oxidation when exposed to air for a long time. These will reduce the magnetic properties and dispersion of the magnetic core, which in turn will lead to a decrease in se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01J20/28
Inventor 刘少民虞柯洁宗凯刘宇欣徐业平
Owner UNIV OF SCI & TECH OF CHINA
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