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Method for preparing mesoporous silicon adsorption material with high specific surface area

A technology of high specific surface area and adsorption material, applied in the field of adsorption material preparation, can solve the problems of poor adsorption, low stability and high price, and achieve the effects of high stability, simple equipment and low price

Inactive Publication Date: 2009-08-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a high specific surface area mesoporous silicon adsorption material in order to solve the problems of poor adsorption, low stability and high price of the existing adsorption materials

Method used

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  • Method for preparing mesoporous silicon adsorption material with high specific surface area
  • Method for preparing mesoporous silicon adsorption material with high specific surface area

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specific Embodiment approach 1

[0008] Specific Embodiment 1: The preparation method of the high specific surface area mesoporous silicon adsorption material in this embodiment is realized according to the following steps: 1. The cetylpyridinium chloride solution with a molar concentration of 50 to 70 mmol / L and a volume of 200 to 300 mL Adjust the pH to 1.0 with hydrochloric acid solution, add the sodium silicate solution with a molar concentration of 2 to 3 mol / L and a volume of 40 to 60 mL dropwise into the cetylpyridinium chloride solution under stirring conditions, and continue to stir for 2.5 to 60 mL. 3.5h, to get a precipitate; 2. Wash the precipitate with deionized water until no foam is generated in the washing liquid, then dry it at a temperature of 50-70°C for 1.5-2.5h, and then dry it at a temperature of 500-700°C Calcination treatment at ℃ for 5-7 hours to obtain a high specific surface area mesoporous silicon adsorption material; wherein the stirring speed in step 1 is 150-200 r / min.

[0009] ...

specific Embodiment approach 2

[0011] Embodiment 2: This embodiment differs from Embodiment 1 in that the molar concentration of the cetylpyridinium chloride solution in step 1 is 55-65 mmol / L and the volume is 220-280 mL. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0012] Embodiment 3: This embodiment differs from Embodiment 1 in that the molar concentration of the cetylpyridinium chloride solution in step 1 is 60 mmol / L and the volume is 250 mL. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention provides a method for preparing a mesoporous silicon adsorption material with high specific surface area, and relates to a method for preparing an adsorption material. The method solves the problems of poor adsorptivity, low stability and high price existing in the prior adsorption material. The preparation method comprises: 1, dropwise adding a solution of sodium silicate to an acidified solution of cetylpyridinium chloride, and magnetically stirring the mixed solution to prepare a precipitate; and 2, washing, drying and calcining the precipitate to obtain the mesoporous silicon adsorption material with high specific surface area. In the method, the mesoporous silicon material is orderly synthesized under the acidic condition. The product obtained by the method has the advantages of good adsorptivity, high stability, large specific surface area, low price of raw materials, simple process and simple equipment.

Description

technical field [0001] The invention relates to a preparation method of an adsorption material. Background technique [0002] The natural environment is the basic guarantee for the survival and development of human beings and the civilization and progress of society. However, with the rapid development of industrialization and the continuous expansion of urbanization in recent years, the types and quantities of pollutants in water bodies have continued to increase, especially the problem of difficult removal of trace organic pollutants in water. At present, there are two methods for removing trace organic pollutants in water: destructive oxidation and adsorption by adsorption materials; however, due to the limitations of oxidants, in most oxidation processes, complex organic substances can be decomposed into small molecular substances, but it is difficult to completely remove them. Mineralization, and these small molecular organics cannot be removed in the subsequent treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/283B01J20/30
Inventor 张冬梅陈忠林徐贞贞
Owner HARBIN INST OF TECH
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