Process for preparing silicon dioxide hollow ball material with hexagonal phase penetrating mesopore orbit

A technology of silica and hexagonal phase, applied in the direction of silica, etc., can solve the problem that the guest molecules cannot be transported inside and outside, and achieve the effect of simple preparation process, good dispersion and mild conditions

Inactive Publication Date: 2007-12-19
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is simple in process, and the hollow core/mesoporous shell structure can be obtained in one step. However, the mesoporous channels of

Method used

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  • Process for preparing silicon dioxide hollow ball material with hexagonal phase penetrating mesopore orbit
  • Process for preparing silicon dioxide hollow ball material with hexagonal phase penetrating mesopore orbit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Co-surfactant is polyvinylpyrrolidone (PVP, k 30 ); Silicon source is tetraethyl orthosilicate, Si(OC 2 h 5 ) 4 ; The surfactant is cetyltrimethylammonium bromide CTAB; the pH value of the solution is adjusted with sodium hydroxide. According to the formula ratio (mass ratio): 0.5PVP: 0.7CTAB: 0.23NaOH: 2.6TEOS: 60H 2 O was added to various reaction substances, stirred, aged, filtered, washed with deionized water and ethanol for several times, dried at 100°C for 12 hours, and finally calcined at 550°C for 6 hours to remove the surfactant.

[0024] Its small-angle X-ray diffraction results are shown in curve 1 in Figure 2; its low-power and high-power transmission electron microscope photos are shown in Figure 3a and b, and its product is a mesoporous hollow sphere with a through-hole channel, and the size of the hollow sphere is 300-400nm , the size of the hollow core is about 200nm. It can be seen that this method can obtain silica mesoporous hollow spheres with h...

Embodiment 2-5

[0025] Embodiment 2-5 basic reaction substance type is constant, only changes the add-on of various reaction substances, obtains following several different implementation modes:

Embodiment 2

[0027] Formula ratio: 0.25PVP: 0.7CTAB: 0.23NaOH: 2.6TEOS: 60H 2 O, its small-angle X-ray diffraction pattern is shown in curve 2 in Figure 2.

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Abstract

A process for preparing the hollow balls of hexagonal-phase meso-porous SiO2 includes such steps as dissolving cosurfactant and surfactant in deionized water, regulating pH value by NaOH, adding Si source, stirring, ageing, filtering, washing, drying and heat treating.

Description

technical field [0001] The invention relates to a method for preparing a silica hollow sphere material with hexagonal phase penetrating mesoporous channels, and belongs to the field of inorganic mesoporous materials. technical background [0002] In 1992, researchers from Mobil Corporation of the United States first reported the M41S series of mesoporous materials with high specific surface area and high degree of order in Nature. Extensive research. Generally, the structure and morphology of materials have an important impact on their applications. The shell has a hollow sphere structure that runs through the mesoporous channels, which can not only greatly increase the loading capacity of guest molecules, but also facilitate the internal and external transport of guest molecules. Therefore, such mesoporous hollow spheres have broader application prospects as catalysts and carrier materials for drug delivery systems. [0003] At present, the preparation methods of silica ...

Claims

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Application Information

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IPC IPC(8): C01B33/113
Inventor 朱钰方施剑林
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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