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A highly ordered radial spherical wrinkled mesoporous silica material and its preparation method

A silica, highly ordered technology, applied in the field of highly ordered radial spherical wrinkled mesoporous silica material and its preparation, to achieve the effects of large adsorption capacity, high selectivity and fast adsorption

Active Publication Date: 2017-02-01
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

However, the preparation method of wrinkled silica nanospheres with stable mesoscopic structure, particle size less than 300nm, pore size greater than 7nm, and highly ordered radial radial radiation mesoporous channels has not been reported yet.

Method used

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  • A highly ordered radial spherical wrinkled mesoporous silica material and its preparation method
  • A highly ordered radial spherical wrinkled mesoporous silica material and its preparation method
  • A highly ordered radial spherical wrinkled mesoporous silica material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Disperse 0.5 g of TEOS in 4 mL of cyclohexane solution at room temperature;

[0033] (2) At room temperature, add 0.08g of CTAB into a mixed solution of 25mL distilled water and 15mL ethanol, and keep stirring until a transparent solution is formed;

[0034] (3) 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;

[0035] (4) Add 0.5 mL of ammonia water to the mixed solution obtained in step (3), and continue to stir and react at 35° C. for 4 h;

[0036] (5) the mixed solution that step (4) is obtained is transferred in the autoclave of the polytetrafluoroethylene liner of 100mL;

[0037] (6) Tighten the autoclave in step (5) and put it in an oven, and cool the autoclave to room temperature naturally after solvothermal reaction at 100° C. for 12 hours;

[0038] (7) Centrifuge the precipitate in step (6), wash it with distilled ...

Embodiment 2

[0042] (1) Disperse 0.5 g of TEOS in 4 mL of cyclohexane solution at room temperature;

[0043] (2) Add 0.08g of CTAB and 0.2g of PVP into a mixed solution of 25mL distilled water and 15mL ethanol, and keep stirring until a transparent solution is formed;

[0044] (3) 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;

[0045] (4) Add 0.5 mL of ammonia water to the mixed solution obtained in step (3), and continue to stir and react at 35° C. for 4 h;

[0046] (5) the mixed solution that step (4) is obtained is transferred in the autoclave of the polytetrafluoroethylene liner of 100mL;

[0047] (6) Tighten the autoclave in step (5) and put it in an oven, and cool the autoclave to room temperature naturally after solvothermal reaction at 100° C. for 12 hours;

[0048] (7) Centrifuge the precipitate in step (6), wash it with distilled wat...

Embodiment 3

[0052] (1) Disperse 0.5 g of TEOS in 4 mL of cyclohexane solution at room temperature;

[0053] (2) Add 0.08g of CTAB and 0.4g of PVP into a mixed solution of 25mL distilled water and 15mL ethanol, and keep stirring until a transparent solution is formed;

[0054] (3) 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;

[0055] (4) Add 0.5 mL of ammonia water to the mixed solution obtained in step (3), and continue to stir and react at 35° C. for 4 h;

[0056] (5) the mixed solution that step (4) is obtained is transferred in the autoclave of the polytetrafluoroethylene liner of 100mL;

[0057] (6) Tighten the autoclave in step (5) and put it in an oven, and cool the autoclave to room temperature naturally after solvothermal reaction at 100° C. for 12 hours;

[0058] (7) Centrifuge the precipitate in step (6), wash it with distilled wat...

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Abstract

The invention relates to a highly-ordered radial spherical crinkled mesoporous silicon dioxide material and a preparation method thereof. The preparation method comprises the following steps: hydrolyzing a silicon source TEOS (tetraethyl orthosilicate) at 35 DEG C by using ethanol, cyclohexane and water as solvents, CTAB (cetyltrimethylammonium bromide) as a surfactant and PVP (polyvinyl pyrrolidone) as a coating agent in the solvothermal reaction process, polycondensing, and calcining the formed mixture to obtain the spherical wrinkled mesoporous SiO2 nano material containing radially-highly-ordered radial pore canal structure. The spherical mesoporous SiO2 prepared by the preparation method has the advantages of controllable particle size and ordered and controllable pore canal structure. The particle size is 240-540nm, the specific area is 490-634 m<2> / g, and the pore size is about 7.4-10.1nm. The invention provides a new idea for preparing the highly-ordered radial pore canal spherical wrinkled mesoporous SiO2 nano material which radiates from the center to the sphere surface.

Description

technical field [0001] The invention belongs to the technical field of nanometer material preparation, in particular to a highly ordered radial spherical wrinkled mesoporous silicon dioxide material and a preparation method thereof. Background technique [0002] Since Mobile successfully prepared the MCM-41 series of mesoporous silica, mesoporous materials have been widely used because of their unique and uniform pore structure, large specific surface area and pore volume, controllable pore size and easy-to-modify surface structure. In the fields of carrier, adsorption, separation and catalysis. However, traditional disordered mesoporous silica spheres face a series of difficulties such as less adsorption capacity and low catalytic activity. Therefore, the preparation of silica materials with ordered mesoporous pore structures has important research value and potential applications. prospect. At present, controlling the morphology, structure and pore size has become one of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/18B82Y30/00
Inventor 周国伟庞晋丽李秀艳
Owner 山东济清科技服务有限公司
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