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Spherical SiO2 material with radial mesoporous structure and preparation method of spherical SiO2 material

A technology of spherical silica and pore structure, applied in the direction of silica, silicon oxide, etc., to achieve the effect of cheap raw materials, good repeatability and simple method

Active Publication Date: 2014-11-05
山东济清科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, using oil-in-water microemulsion droplets as a template and TEOS as a silicon source to prepare mesoscopic order extending to the entire particle, and silica nanospheres with radially ordered mesoporous channels have not been reported yet.

Method used

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  • Spherical SiO2 material with radial mesoporous structure and preparation method of spherical SiO2 material
  • Spherical SiO2 material with radial mesoporous structure and preparation method of spherical SiO2 material
  • Spherical SiO2 material with radial mesoporous structure and preparation method of spherical SiO2 material

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Embodiment 1

[0032](1) At room temperature, 0.5g of TEOS was dispersed in 2mL of cyclohexane solution; (2) At room temperature, 0.08g of CTAB was added to 25mL of distilled water and 15mL of ethanol mixed solution, stirring continuously until a transparent solution was formed; Under the condition of constant stirring, the solution obtained in step (1) is quickly added to the transparent solution obtained in step (2), and stirred for 2 hours to form a mixed solution; (4) add 0.5 mL of the mixed solution obtained in step (3) Ammonia, continue to stir and react at 35°C for 4h; (5) centrifuge the precipitate in step (4), wash it with distilled water for 3 times, and dry it at 60°C for 24h in a blast drying oven to obtain the product; (6) The product obtained in step (5) is placed in a box-type calciner and calcined at 550 ° C for 6 hours to obtain SiO 2 powder. TEM of the product as figure 1 As shown in a, mesoporous SiO 2 The average particle size of the sphere is 650nm, and the mesopore d...

Embodiment 2

[0034] (1) Disperse 0.5g of TEOS in 3mL of cyclohexane solution; (2) At room temperature, add 0.08g of CTAB into 25mL of distilled water and 15mL of ethanol mixed solution, stirring continuously until a transparent solution is formed; (3) in Under the condition of constant stirring, the solution obtained in step (1) is quickly added to the transparent solution obtained in step (2), and stirred for 2 hours to form a mixed solution; (4) add 0.5 mL of the mixed solution obtained in step (3) Ammonia, continue to stir and react at 35°C for 4h; (5) centrifuge the precipitate in step (4), wash it twice with distilled water, and dry it at 60°C for 24h in a blast drying oven to obtain the product; (6) The product obtained in step (5) is placed in a box-type calciner and calcined at 550 ° C for 6 hours to obtain SiO 2 powder. TEM of the product as figure 1 As shown in b, mesoporous SiO 2 The average particle size of the spheres is 450nm, the mesopore diameter is 3.95nm, and radial ra...

Embodiment 3

[0036] (1) At room temperature, 0.5g of TEOS was dispersed in 4mL of cyclohexane solution; (2) 0.08g of CTAB was added to 25mL of distilled water and 15mL of ethanol mixed solution, stirring continuously until a transparent solution was formed; (3) in Under the condition of constant stirring, the solution obtained in step (1) is quickly added to the transparent solution obtained in step (2), and stirred for 2 hours to form a mixed solution; (4) add 0.5 mL of the mixed solution obtained in step (3) Ammonia, continue to stir and react at 35°C for 4h; (5) centrifuge the precipitate in step (4), wash it with distilled water for 3 times, and dry it at 60°C for 24h in a blast drying oven to obtain the product; ) The product obtained is placed in a box-type calciner and calcined at 550°C for 6h to obtain SiO 2 powder. Product Mesoporous SiO 2 The average particle size of the ball is 400nm, the mesopore diameter is 3.91nm, and the specific surface area is 1046m 2 / g. Product N 2 ...

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Abstract

The invention discloses a spherical SiO2 material with a radial mesoporous structure and a preparation method of the spherical SiO2 material. The preparation method comprises the steps: with an oil-in-water type microemulsion system formed by CTAB, PVP, ethanol, cyclohexane and water as a template and TEOS as a silicon source, hydrolyzing, carrying out condensation polymerization and self-assembling to synthesize a mesoporous material, and calcining to remove organic matters to obtain the required spherical mesoporous SiO2 nanomaterial with the radial mesoporous structure. The mesoscopic orderliness of the material exists in the whole particle, the particle size ranges from 350nm to 650nm, the specific surface area is 975-1114m<2> / g, and the pore diameter is 3.9-4.1nm. The preparation method of the spherical mesoporous SiO2, disclosed by the invention, is relatively simple, simple and efficient in preparation process and good in repeatability; the used raw materials are cheap, easy to obtain and safe. The invention provides a new thought for preparing the spherical mesoporous SiO2.

Description

technical field [0001] The invention belongs to the field of inorganic material science, and in particular relates to a spherical mesoporous silica material with a radial mesoporous channel structure and a preparation method thereof. Background technique [0002] Silica nanospheres are very popular for their unique large specific surface area, large pore volume and narrow pore size distribution. As an important carrier material, good biocompatibility, thermal stability and high mechanical stability make it highly academic in the fields of drug delivery and release, enzyme immobilization, and biomolecular separation. Research and industrial application value, thus becoming a hot spot in material science research. [0003] Microemulsions are usually isotropic, thermodynamically stable, low-viscosity, transparent or translucent in appearance, and nano-scale dispersion systems composed of surfactants, co-surfactants, oil phases, and water phases in appropriate proportions. Acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
Inventor 周国伟庞晋丽李秀艳张彦孙彬
Owner 山东济清科技服务有限公司
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