A kind of preparation method of high-purity monodisperse porous silica ball

A porous silicon oxide, monodisperse technology, applied in the field of nanomaterials, can solve the problems of easily broken balls, complex preparation process of soft template method, narrow pore size distribution range, etc., achieve good shape, wide pore size distribution range, and reduce production costs Effect

Active Publication Date: 2022-05-03
ANHUI ESTONE MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing high-purity monodisperse porous silica spheres, which does not require the synthesis of polymer templates, surfactants, porogens, and corresponding operating steps. Utilizing the steric hindrance effect of the phenyl group contained in trimethoxyphenylsilane (PTMS) to cause pores, the preparation process is simple, and resources such as polymers and surfactants are also saved, production costs are reduced, and the hard template method is solved. The ball is easy to break during the mold removal process, the preparation process of the soft template method is complicated, and the pore size distribution is narrow.

Method used

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  • A kind of preparation method of high-purity monodisperse porous silica ball
  • A kind of preparation method of high-purity monodisperse porous silica ball
  • A kind of preparation method of high-purity monodisperse porous silica ball

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Embodiment 1

[0033] (1) Using magnetic stirring water bath pot, at a speed of 1200rpm, 40 ° C, 100mL methanol and 100mL deionized water were mixed to obtain a mixture of 1, 4.00g PTMS and 6.00g TEOS were mixed to obtain a mixture 2, 20mL of ammonia water was added to the mixture 1, the mixture 3 was obtained, the mixture 2 was added to the mixture 3, and the mixture was continuously stirred for 7h to obtain a phenyl-containing silica sol.

[0034] (2) The phenyl-containing silica sol is washed three times by centrifugation with absolute ethanol at a speed of 9000rpm, and then the centrifugal product is placed in an oven and dried at 100 °C for 10h, and the resulting white powder is phenyl-containing silica.

[0035] (3) The above-mentioned phenyl-containing silica is placed in a muffle furnace, heated to 600 °C, the heating rate is 3 °C / min, and the heat preservation is 6h to obtain a high-purity porous silica ball.

[0036] Figure 1 Scanning electron microscopy of porous silica oxide balls ...

Embodiment 2

[0038] The specific operating steps of Example 2 are the same as those of Example 1, the difference is that the step of Example 2 (1) in PTM is 3.00g, TEOS is 7.00g.

[0039] Figure 3Scanning electron microscopy of the porous silica ball prepared for embodiment 2 of the present invention, as can be seen from the figure, the sample is spherical, with an average particle size of 1.25μm.

Embodiment 3

[0041] The specific operating steps of Example 3 are the same as In Example 1, the difference is that the volume of ammonia in step (1) of Example 3 is 14mL, and the particle size of the resulting porous silica sphere is 0.4μm.

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Abstract

The invention discloses a method for preparing high-purity monodisperse porous silica spheres, which relates to the technical field of nanomaterials. The method for preparing high-purity monodisperse porous silica spheres does not require polymer templates, surfactants, The porogen uses the steric hindrance effect of the phenyl group in the silicon source to form pores, which makes the preparation process simple, saves resources such as polymers and surfactants, and reduces production costs; and no polymers, There are no other substances such as surfactants, so there are no residual components such as surfactants, and the purity is higher.

Description

Technical fields: [0001] The present invention relates to the field of nanomaterial technology, specifically to a high-purity monodisperse porous silica ball preparation method. Background: [0002] Porous silica balls have the characteristics of high porosity, large specific surface area, stable chemical properties and non-toxicity, so they have a wide range of applications in adsorption, catalysis, filtration, biomedicine and other fields. [0003] At present, the synthesis methods of porous silica balls are diverse, but they basically use soft template method and hard template method. Among them, the hard template method uses the synthetic polymer microspheres as the template in advance, so that the silica precursor is deposited and grown on the polymer surface, and finally the silica composite ball is obtained, but after the end of the reaction, the polymer template needs to be calcined or dissolved in the solvent to obtain the porous silica sphere, and in the process of rem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02
CPCB01J13/02
Inventor 马珍珍蒋学鑫王韶晖张轲轲
Owner ANHUI ESTONE MATERIAL TECH CO LTD
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