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A rapid preparation of high surface area porous feo x /sio 2 Methods of composite materials and resulting porous materials and applications

A composite material, high surface area technology, applied in applications, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of difficult to achieve efficient mass production, easy to block pores, cumbersome steps, etc., to promote adsorption. and the effect of catalytic activity, increased specific surface area, and simple process steps

Active Publication Date: 2021-03-02
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the post-synthesis loading method can introduce active components into porous silica, the steps are cumbersome and when the loading is high, it is easy to block the pores and destroy the pore structure, and it is difficult to achieve efficient mass production
The above two types of methods have certain difficulties in the preparation of iron-silicon composite materials with high iron content, and the waste liquid pollutes the environment.
[0004] In addition, traditional porous composite materials and iron-degradable materials are mostly in powder form, which is inconvenient to use, difficult to recycle, and has a low recycling rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049](1) Add 12.4 moles of water and 30.6 moles of absolute ethanol to the beaker, stir for 10 minutes under a magnetic stirrer, add 1.68 moles of n-butylamine, stir for 30 minutes, add 1 mole of ethyl orthosilicate and stir for 4 minutes Let it stand for 6 minutes, and after gelation, age for 1 hour. The aging gel sample is put into the oven,oC dry for 4 hours;

[0050](2) Using Fe / SiO2The molar ratio is 0.01, and weigh the iron acetylacetonate and SiO2The gel is mixed and put into the agate ball milling tank, the mass ratio of the material balls is 1:25, and the composite powder is obtained by ball milling at a speed of 150 revolutions per minute for 30 minutes;

[0051](3) The composite powder is subjected to compression molding when the molding pressure is 34 MPa to prepare a block composite material. The obtained bulk composite material is heated at a heating rate of 5oC / minute rises to 550oC calcined for 6 hours;

[0052](4) The prepared porous FeOx / SiO2The composite material was adde...

Embodiment 2

[0055](1) Same as Example 1;

[0056](2) Using Fe / SiO2The molar ratio is 0.05, and weigh the iron acetylacetonate and SiO2The gel is mixed and put into the agate ball milling tank, the mass ratio of the material balls is 1:25, and the composite powder is obtained by ball milling at a speed of 150 revolutions per minute for 30 minutes;

[0057](3) The composite powder is subjected to compression molding when the molding pressure is 34 MPa to prepare a block composite material. The obtained bulk composite material is heated at a heating rate of 5oC / minute rises to 750oC calcined for 6 hours;

[0058](4) The prepared porous FeOx / SiO2The composite material was added to a 20 mg / L methylene blue solution at a ratio of 0.01 g / mL, and placed in a water bath constant temperature oscillator for adsorption for 5 hours.

[0059]Through nitrogen adsorption and desorption analysis, the specific surface area of ​​the composite material is 310m2 / g, the pore size is 17.4 nm, and the pore volume is 0.827mL / g; th...

Embodiment 3

[0061](1) Add 12.4 moles of water and 30.6 moles of absolute ethanol to the beaker, stir for 10 minutes under a magnetic stirrer, add 1.68 moles of n-butylamine, stir for 30 minutes, add 1 mole of ethyl orthosilicate and stir for 4 minutes Let it stand for 6 minutes, and after gelation, age for 1 hour. The aging gel sample is put into the oven,oC dry for 4 hours;

[0062](2) Using Fe / SiO2The molar ratio is 0.1, weigh out iron acetylacetonate and SiO2The gel is mixed and put into the agate ball milling tank, the mass ratio of the material balls is 1:25, and the composite powder is obtained by ball milling at a speed of 150 revolutions per minute for 30 minutes;

[0063](3) The composite powder is subjected to compression molding at a molding pressure of 34 MPa to prepare a block composite material. The obtained bulk composite material is heated at a heating rate of 5oC / minute rises to 550oC calcined for 6 hours;

[0064](4) The prepared porous FeOx / SiO2The composite material was added to a 50...

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Abstract

The invention provides a rapid preparation of high surface area porous FeO x / SiO 2 Methods of composite materials and resulting porous materials and applications. Using tetraethyl orthosilicate, absolute ethanol, distilled water, and n-butylamine as raw materials, SiO was prepared by sol-gel method 2 sol, dried to obtain SiO 2 dry gel. Weigh the dried SiO 2 The gel and iron acetylacetonate are mixed according to different proportions, put into an agate ball mill jar, and ball milled to obtain a composite powder, which is molded and then calcined to obtain a block composite material. Under the condition of ball milling, iron acetylacetonate and SiO 2 The chemical bonds of the gel are broken, and the two substances recombine to form a new stable state, achieving the purpose of compounding. Iron-containing bulk composites with purer SiO 2 Compared with the bulk materials pressed by gel, the surface area is increased. The obtained composite material has a good ability to adsorb dye molecules in the dye wastewater, and also has the effect of degrading the dye after adding the hydrogen peroxide solution.

Description

Technical field[0001]The invention relates to a rapid preparation of high surface area porous FeOx / SiO2The method of composite material and the obtained porous material and its application, specifically involving the use of SiO2Dry gel and iron acetylacetonate are compounded by ball milling, then molded and calcined to prepare porous FeOx / SiO2Composite material method and obtained high specific surface area porous FeOx / SiO2The application of composite materials in the adsorption and degradation of dye wastewater belongs to the technical field of environmental materials.Background technique[0002]Pure porous silica has a large surface area and can be used as an adsorbent for wastewater treatment, but only by adsorption, its effect on wastewater treatment is limited, and it is related to the type of wastewater to be treated and the pH value. By compounding with other materials and introducing functions such as ion exchange and catalytic degradation, the use range and efficiency of poro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/00C04B38/00C04B35/14C04B35/624B01J20/10B01J20/28B01J20/30C02F1/28C02F1/72C02F101/36C02F101/38C02F101/30
CPCB01J20/06B01J20/103B01J20/28061B01J20/28064B01J20/28073B01J20/28076B01J20/28083C02F1/281C02F1/288C02F1/722C02F1/725C02F2101/308C02F2101/36C02F2101/38C02F2101/40C04B30/00C04B35/14C04B35/624C04B38/0054C04B2235/3272C04B14/06C04B22/06C04B38/0045
Inventor 刘世权刘璐
Owner UNIV OF JINAN