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

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: 2016-06-22
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

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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 6.08g of ferric chloride hexahydrate and 1.87g of sodium citrate dihydrate in 100mL of ethylene glycol, and stir at 1000rpm at 30°C for 1h. Add 7.51g of anhydrous sodium acetate, transfer the above mixed solution into a reaction kettle, raise the temperature from room temperature to 200°C for 2h, and keep it warm for 6h. 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±26nm;

[0039] (2) Preparation of Fe3O4 nanoparticles

[0040] Mix 120mL of ethanol, 20mL of water and 4mL of 0.5mol / L sodium hydr...

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 50mL of ethanol, 5mL of water and 1mL of potassium hydroxide solution (KOH) with a concentration of 0.5mol / L to obtain a mixed solution, add 0.1-1.0g of ferric oxide nanospheres to the mixed solution; slowly add 1.5 mL tetraethyl orthosilicate (TEOS), 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 );

[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] (4) Prepar...

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 250mL of ethanol, 50mL of water and 10mL of ammonia water with a concentration of 28% to obtain a mixed solution, add 0.1-1.0g of iron ferric oxide nanospheres to the mixed solution; after ultrasonication for 10min, slowly add 1.5mL of ethyl orthosilicate (TEOS ), 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 phenyl functionalized radial magnetic core-shell mesoporous silicon material. In the present invention, the magnetic ferric ferric oxide nanosphere is used as the core, and the radial magnetic core-shell mesoporous silicon can be easily prepared under the condition of the improved co-condensation method (Co-condensation). By changing the ratio of phenylalkoxy silicon source and silicate silicon source, the fiber spine density of magnetic core-shell mesoporous silicon can be conveniently adjusted. Compared with the traditional synthesis method, the invention has simple process and equipment, strong controllability, novel appearance of the material, good dispersibility, low cost, possibility of batch preparation and wide 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 Patents(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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