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Method for preparing magnetic SBA-15

A SBA-15, magnetic technology, applied in chemical instruments and methods, molecular sieve compounds, inorganic chemistry, etc., can solve the problems of high synthesis cost of instruments and equipment, and achieve the effect of low production cost, high porosity, and large specific surface area

Inactive Publication Date: 2014-11-26
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a greener, greener and less costly method for preparing magnetic SBA-15, to overcome the problems of acidic waste liquid brought by the prior art, high equipment for preparing materials and high synthesis cost question

Method used

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  • Method for preparing magnetic SBA-15
  • Method for preparing magnetic SBA-15

Examples

Experimental program
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Embodiment 1

[0019] First weigh 1.5g of ferrous chloride, stir it in the dark, dissolve it in a beaker with 50ml of deionized water, then add 2g of P123 to the beaker, stir magnetically at room temperature to form a uniform solution, then add 4.25 g TEOS, stirred at 40°C for 20h, then transferred the reaction product and mother liquor to a polytetrafluoroethylene stainless steel hydrothermal kettle, and heated it at 100°C for 72h, after cooling, the sample was filtered, oven-dried, and finally in air atmosphere Calcined at 500°C for 6 hours to remove the template and obtain a magnetic SBA-15 sample with a specific surface area of ​​749m 2 / g, pore diameter 7.5nm, pore volume 1.40cc / g.

[0020] The scanning electron microscope picture of the magnetic SBA-15 mesoporous molecular sieve material prepared in this embodiment is as follows figure 1 shown.

[0021] The transmission electron microscope picture of the magnetic SBA-15 mesoporous molecular sieve material prepared in this embodiment ...

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Abstract

The invention relates to a method for preparing magnetic SBA-15, which comprises the following steps: 1) dissolving a ferrous compound in water by stirring under dark conditions, adding P123 and TEOS (tetraethyl orthosilicate), and stirring; 2) transferring the reaction product and mother solution into polytetrafluoroethylene to carry out hydrothermal crystallization; and 3) cooling, filtering, drying, and calcining to obtain the end product. In the method, the ferrous chloride water solution is an acidic solution, the P123 can be dissolved more quickly in the acidic solution, and the TEOS can be hydrolyzed under such acidic conditions; and therefore, no additional acid source in the public known technique is needed, so no acidic waste liquid can be generated.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic materials, and in particular relates to a green and environment-friendly method for preparing magnetic SBA-15. Background technique [0002] Mesoporous molecular sieves have become a hot research field since the first report of MCM-41 mesoporous silica material by scientists from Mobil Oil Company in the United States in 1992. In the past 20 years, both in the synthesis of new mesoporous molecular sieves, in the study of their formation mechanism, and in the application of mesoporous molecular sieves, rapid development has been achieved. In particular, the discovery of new mesoporous molecular sieves of the SBA series has further expanded the types and structures of mesoporous materials. [0003] SBA-15 mesoporous molecular sieve is often used in catalysis, adsorption, separation and host-guest due to its regular pore structure, adjustable pore size, high specific su...

Claims

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Application Information

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IPC IPC(8): C01B37/00C01B39/00C01G49/02
Inventor 赵颖席北斗彭星李曹乐夏训峰杨天学李晓光张列宇侯佳奇郭祎阁刘文芳
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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