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Prepn of mesoporous spherical nano Sio2 particle

A technology of mesoporous silica and nanoparticles, applied in the direction of silica, silicon oxide, etc., can solve the problems of irregular and uniform product appearance, and achieve the effects of low reaction temperature, short production cycle and simple operation

Inactive Publication Date: 2005-01-26
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As described in the literature (Robert I. Nooney, Dhanasekaran Thirunavukkarasu, et al. Synthesis of Nanoscale Mesoporous Silica Spheres with Controlled Particle Size. Chem. Mater. 2002, 14, 4721-4728), in recent years, the shape control of mesoporous materials The method has been greatly developed, however, the shape of the product is generally irregular and symmetrical

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0018] ①In a 50ml Erlenmeyer flask, mix 0.35ml of 2 mol / L sodium hydroxide aqueous solution, 8ml of ethanol, 0.05g of cetyltrimethylammonium bromide, 0.25ml of tetraethyl orthosilicate and 40ml Mix with deionized water. Stir at room temperature for 30 minutes.

[0019] ②Synthesis process: Pour the above-mentioned mixed solution into a polytetrafluoroethylene reactor of about 50 ml, put the reactor into a stainless steel protective shell, and tighten the cover. As for the blast oven, raise the temperature to 100°C and keep the temperature constant for 24 hours.

[0020] ③Post-treatment: After the reaction is completed, filter and wash the solution in the reactor, place the resulting filter cake in an oven at 50°C to dry to obtain a powder, place the powder in a muffle furnace, raise the temperature to 550°C and keep the temperature constant for 6 hours , the resulting powder is spherical mesoporous silica nanoparticles.

[0021] The transmission electron microscope pictures ...

Embodiment 2

[0023] ①In a 50ml Erlenmeyer flask, mix 0.35ml of 2 mol / L sodium hydroxide aqueous solution, 0.05g of cetyltrimethylammonium bromide, 0.25ml of tetraethyl orthosilicate and 50ml of deionized water mix. Stir at room temperature for 30 minutes.

[0024] ②Synthesis process: Pour the above mixed solution into a polytetrafluoroethylene reactor, put the reactor into a stainless steel protective shell, and tighten the cover. As for the blast oven, the temperature was raised to 120° C., and the temperature was kept constant for 12 hours.

[0025] ③Post-treatment: After the reaction is completed, filter and wash the solution in the reactor, place the resulting filter cake in an oven at 50°C to dry to obtain a powder, place the powder in a muffle furnace, raise the temperature to 550°C and keep the temperature constant for 6 hours , the resulting powder is spherical mesoporous silica nanoparticles.

Embodiment 3

[0027] ①In a 50ml Erlenmeyer flask, mix 0.14g of sodium hydroxide powder, 8ml of n-butanol, 0.05g of cetyltrimethylammonium bromide and 0.25ml of tetraethyl orthosilicate with 40ml of deionized water to mix. Stir at room temperature for 30 minutes.

[0028] ②Synthesis process: Pour the above mixed solution into a polytetrafluoroethylene reactor, put the reactor into a stainless steel protective shell, and tighten the cover. As for the blast oven, raise the temperature to 120°C and keep the temperature constant for 24 hours.

[0029] ③Post-treatment: After the reaction is completed, filter and wash the solution in the reactor, place the resulting filter cake in an oven at 50°C to dry to obtain a powder, place the powder in a muffle furnace, raise the temperature to 550°C and keep the temperature constant for 6 hours , the resulting powder is spherical mesoporous silica nanoparticles.

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Abstract

The preparation process of mesoporous spherical nano SiO2 particle includes mixing deionized water, CTAB, tetraethyl metasilicate, water solution or ammonia water solution of sodium hydroxide and alcohol solvent in certain proportion; heating reaction of the mixture inside PTFE reactor with protecting stainless steel casing and set in stove with blower; filtering of the reacted solution; washing and high temperature roasting to obtain mesoporous spherical nano SiO2 particle with homogeneous size. The process of the present invention is simple, low in cost and short in production period, and the prepared mesoporous spherical nano SiO2 particle is homogeneous in size, regular in appearance and ordered in pore channel.

Description

Technical field: [0001] The invention relates to a preparation method of mesoporous silica spherical nanoparticles, in particular to the preparation of mesoporous silica spherical nanoparticles by a hydrothermal method. It belongs to the technical field of chemistry and inorganic materials. Background technique: [0002] According to the definition of the International Union of Theoretical and Applied Chemistry (IUPAC), mesoporous materials refer to porous materials with a pore diameter between 2 and 50 nanometers. It has the same regular pore structure as microporous materials, large specific surface area and pore volume, but the pore diameter can be adjusted between 1.5 and 10nm, which highlights its uniqueness when it comes to catalytic reactions or adsorption separations of large-sized molecules sex. The preparation of mesoporous materials by the template method is not only relatively simple in preparation conditions, but also more flexible in terms of chemical composi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12C01B33/18
Inventor 张言波钱雪峰朱子康
Owner SHANGHAI JIAOTONG UNIV
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