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Lanthanum-loaded di-amino modified meso-porous silicon material and preparation method thereof

A mesoporous silicon, bisamino technology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve problems such as low adsorption capacity, achieve uniform pore size distribution, good application prospects, The effect of good adsorption properties

Inactive Publication Date: 2017-07-21
HEBEI NORMAL UNIV
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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 lanthanum-loaded diamino-modified mesoporous silicon material and its preparation method, which solves the problem of low adsorption capacity of materials adsorbing phosphate

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] A lanthanum-supported diamino-modified mesoporous silicon material, specifically prepared according to the following steps:

[0024] Step 1, preparation of MCM-41 mesoporous silicon material

[0025] First, dissolve 1.376g of sodium hydroxide (NaOH) in water, slowly stir and add 15.6g of cetyltrimethylammonium bromide (CTAB), stir for 0.5h until the solution is clear, slowly add 32ml of orthosilane under vigorous stirring Tetraethyl Oxide (TEOS), after the dropwise addition, adjust the pH=9.5, continue to stir vigorously for 2h to promote its hydrolysis, and then adjust the pH=9.5 to obtain the raw material mixture; wherein sodium hydroxide: hexadecyltrimethyl bromide The ratio of ammonium chloride: tetraethyl orthosilicate: water is 1.376g: 15.6g: 32ml: 320ml;

[0026] Transfer the above raw material mixture to a self-boosting reaction kettle, crystallize at 110°C for 48 hours, filter, collect the white precipitate, then wash it with deionized water, and finally dry i...

Embodiment 2

[0034] A lanthanum-supported diamino-modified mesoporous silicon material, specifically prepared according to the following steps:

[0035] Step 1, preparation of MCM-41 mesoporous silicon material

[0036] First, dissolve 1.376g of sodium hydroxide (NaOH) in water, slowly stir and add 15.6g of cetyltrimethylammonium bromide (CTAB), stir for 0.5h until the solution is clear, slowly add 32ml of orthosilane under vigorous stirring Tetraethyl Oxide (TEOS), after the dropwise addition, adjust the pH=9.5, continue to stir vigorously for 2h to promote its hydrolysis, and then adjust the pH=9.5 to obtain the raw material mixture; wherein sodium hydroxide: hexadecyltrimethyl bromide The ratio of ammonium chloride: tetraethyl orthosilicate: water is 1.376g: 15.6g: 32ml: 320ml;

[0037] Transfer the above raw material mixture to a self-boosting reaction kettle, crystallize at 110°C for 48 hours, filter, collect the white precipitate, then wash it with deionized water, and finally dry i...

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Abstract

The invention discloses a lanthanum-loaded di-amino modified meso-porous silicon material and a preparation method thereof. The preparation method comprises the following steps: preparing MCM-41 meso-porous silicon material by using sodium hydroxide, cetyl trimethylammonium bromide, tetraethyl orthosilicate and water as raw materials; then carrying out di-amino modification on the MCM-41 meso-porous silicon material to obtain a di-amino modified meso-porous silicon material; and finally carrying out lanthanum loading with lanthanum nitrate isopropanol to obtain the lanthanum-loaded di-amino modified meso-porous silicon material. A large number of lanthanum ions are loaded on the surface of the material, by effects of the lanthanum ions and phosphate in water, the phosphate is fixed on the surface of an adsorption material, and therefore, phosphate ions in the water are removed. The lanthanum-loaded di-amino modified meso-porous silicon material can be used for an adsorption phosphorous removal process of sewage, the adsorption capacity can reach 38 mg / g or above, and therefore, the preparation method has good application prospect in the aspect of preparation of a phosphate adsorbent.

Description

technical field [0001] The invention belongs to the technical field of preparation of mesoporous silicon materials, and in particular relates to a lanthanum-supported diamino-modified mesoporous silicon material and a preparation method thereof. Background technique [0002] At present, with the discharge of phosphorus-containing domestic sewage and industrial waste books, the concentration of phosphate in the water body increases, and phosphate is the limiting nutrient element for the growth of aquatic algae. The original ecological balance of the water body was damaged, causing the ecological disaster of the water body, and finally caused the water body to lose its original function. Therefore, how to eliminate excess phosphate radicals in water bodies has become one of the research hotspots of scientists from all over the world. [0003] At present, the removal methods of phosphorus in water mainly include: biological method, chemical precipitation method, artificial wet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/0207B01J20/0296B01J20/22B01J20/28057B01J20/28083B01J20/2809C02F1/288C02F2101/105
Inventor 张鉴达杨小雨周美玲于国强乔志芳张旭辉常春平高伟明
Owner HEBEI NORMAL UNIV
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