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Process for synthesizing mesoporous silicon molecular sieve with inorganic potassium salt reaction system

A technology of mesoporous silica and synthesis methods, which is applied in the directions of inorganic chemistry, chemical instruments and methods, molecular sieves and alkali-exchange compounds, etc., to achieve the effects of extending the application range, high synthesis efficiency, and reducing synthesis temperature and surfactant concentration.

Inactive Publication Date: 2004-10-06
FUDAN UNIV
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  • Description
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  • Application Information

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Problems solved by technology

The present invention just utilizes this principle to propose a method for synthesizing mesoporous silica molecular sieve materials using an inorganic potassium salt reaction system, but there is no report of this work in the existing literature

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1, 0.3 gram of Pluronic P123 (EO 20 PO 70 EO 20 ) and 2.5 grams of KCl were dissolved in 35 grams of 2M hydrochloric acid aqueous solution; after the surfactant and inorganic potassium salt were dissolved, 2.08 grams of TEOS was added to the solution; The process and the cooperative self-assembly process form a highly ordered organic-inorganic composite material; after the material is hydrothermally aged at 100°C for 24 hours, it is finally calcined at 550°C for 6 hours to remove the surfactant. Analysis tests such as PXRD, BET and TEM prove that the film material is a high-quality two-dimensional hexagonal silicon oxide material. The specific surface area of ​​the material is 680m 2 / g, the pore volume is 1.2cm 3 / g, the pore size is 7.4 nm.

Embodiment 2

[0013] Embodiment 2, 0.5 gram of Pluronic P123 (EO 20 PO 70 EO 20 ) and 1.5 grams of KCl were dissolved in 35 grams of 2M hydrochloric acid aqueous solution; after the surfactant and inorganic potassium salt were dissolved, 2.08 grams of TEOS was added to the solution; The process and the cooperative self-assembly process form a highly ordered organic-inorganic composite material; after the material is hydrothermally aged at 100°C for 24 hours, it is finally calcined at 550°C for 6 hours to remove the surfactant. Analysis tests such as PXRD, BET and TEM prove that the film material is a high-quality two-dimensional hexagonal silicon oxide material. The specific surface area of ​​the material is 760m 2 / g, the pore volume is 1.3cm 3 / g, the pore size is 7.4 nm.

Embodiment 3

[0014] Embodiment 3, 0.7 gram of Pluronic P123 (EO 20 PO 70 EO 20 ) and 1.0 g of KCl were dissolved in 35 g of 2M hydrochloric acid aqueous solution; after the surfactant and inorganic potassium salt were dissolved, 2.08 g of TEOS was added to the solution; The process and the cooperative self-assembly process form a highly ordered organic-inorganic composite material; after the material is hydrothermally aged at 100°C for 24 hours, it is finally calcined at 550°C for 6 hours to remove the surfactant. Analysis tests such as PXRD, BET and TEM prove that the film material is a high-quality two-dimensional hexagonal silicon oxide material. The specific surface area of ​​the material is 810m 2 / g, the pore volume is 1.3cm 3 / g, the pore size is 7.4 nm.

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Abstract

A 2D and 3D silicon oxide molecular sieve material is prepared from concentrated solution of inorganic potassium salt and non-ionic surfactant as structure guiding agent, and is characterized by highly ordered mesoporous structure, very high specific surface area and pore volume, low synthesizing temp, less consumption of template agent, and wide application range.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanometer materials, and specifically relates to a method for synthesizing mesoporous silicon oxide molecular sieve materials by using an inorganic potassium salt reaction system. technical background [0002] In M41S and SBA-n series mesoporous molecular sieves, MCM-41 and SBA-15 are the two main members, both of which have similar one-dimensional channels, high specific surface area and excellent thermal stability. Their unique structure endows them with broad application prospects and great significance in catalysis and separation. In comparison, SBA-15 has a larger pore size and larger pore volume than MCM-41, so it has more application advantages in the separation of biological macromolecules and the chemistry of host-guest materials. Therefore, it is very important to optimize the synthesis of SBA-15, and its optimization direction is mainly: 1, reduce the reaction temperature; 2, reduce ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/00C01B39/04
Inventor 田博之刘晓英屠波赵东元
Owner FUDAN UNIV
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