Preparation method and application of catalytic material based on magnetic layered double hydroxides

A hydroxide and catalytic material technology, applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, chemical instruments and methods, etc., can solve the problem of poor catalyst recycling effect and low catalytic efficiency , complex preparation process and other problems, to achieve the effect of good catalytic activity and stability, stable structure, and simple preparation process

Inactive Publication Date: 2020-03-17
CHINESE ACAD OF ENVIRONMENTAL PLANNING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The longer the silver branches in the prepared sea urchin-shaped silver shell, the better the catalytic effect, but it is more difficult to prepare longer silver branches, and the chance is greater
[0006] In order to improve the catalytic efficiency of magnetic catalysts, researchers have conducted a lot of research. However, the current preparation technology still has problems such as complicated preparation process, low catalytic efficiency, and poor catalyst recycling effect. Therefore, it is urgent to develop a magnetic catalyst. Preparation process of magnetic catalyst with simple preparation process and high catalytic efficiency

Method used

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  • Preparation method and application of catalytic material based on magnetic layered double hydroxides
  • Preparation method and application of catalytic material based on magnetic layered double hydroxides
  • Preparation method and application of catalytic material based on magnetic layered double hydroxides

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Embodiment 1

[0045] A preparation method of a catalytic material based on a magnetic layered double hydroxide:

[0046] (1) The preparation method of magnetic layered double metal hydroxide, comprises the following steps:

[0047] [1] Mix and stir 5.4g ferric chloride, 9.6g sodium acetate, 2.0g sodium citrate, and 160mL ethylene glycol for 30 minutes to obtain mixture 1;

[0048] [2] The mixture 1 obtained in step [1] is placed in a reactor for reaction, the reaction temperature is 200°C, and the time is 8 hours to obtain ferric oxide;

[0049] [3] After mixing and stirring 0.425g ferric oxide, 100mL ethanol, 25mL deionized water, and 1.8mL ammonia water, add 1.25mL tetraethoxysilane to react at room temperature for 12 hours to obtain magnetic silica gel particles;

[0050] [4] Mix 0.2 g of magnetic silica gel particles with 100 mL of deionized water, adjust the pH of the solution to 10, and obtain an aqueous silica gel solution.

[0051] [5] Adding 40mL of magnesium nitrate and aluminum...

Embodiment 2

[0056] A preparation method of a catalytic material based on a magnetic layered double hydroxide:

[0057] (1) The preparation method of magnetic layered double metal hydroxide, comprises the following steps:

[0058] [1] Mix and stir 5.0g ferric chloride, 9.2g sodium acetate, 1.6g sodium citrate, and 140mL ethylene glycol for 35 minutes to obtain mixture 1;

[0059] [2] The mixture 1 obtained in step [1] is placed in a reactor for reaction, the reaction temperature is 200°C, and the time is 8 hours to obtain ferric oxide;

[0060] [3] After mixing and stirring 0.40g ferric oxide, 80mL ethanol, 20mL deionized water, and 1.6mL ammonia water, add 1.0mL tetraethoxysilane to react at room temperature for 10 hours to obtain magnetic silica gel particles;

[0061] [4] Mix 0.15 g of magnetic silica gel particles with 90 mL of deionized water, adjust the pH of the solution to 9.5, and obtain an aqueous silica gel solution.

[0062] [5] Add 40mL magnesium nitrate and aluminum nitrate...

Embodiment 3

[0067] A preparation method of a catalytic material based on a magnetic layered double hydroxide:

[0068] (1) The preparation method of magnetic layered double metal hydroxide, comprises the following steps:

[0069] [1] Mix and stir 5.8g ferric chloride, 10.0g sodium acetate, 2.4g sodium citrate, and 180mL ethylene glycol for 35 minutes to obtain mixture 1;

[0070] [2] The mixture 1 obtained in step [1] is placed in a reactor for reaction, the reaction temperature is 200° C., and the time is 10 hours to obtain ferric oxide;

[0071] [3] After mixing and stirring 0.45g ferric oxide, 120mL ethanol, 30mL deionized water, and 2.0mL ammonia water, add 1.5mL tetraethoxysilane to react at room temperature for 14 hours to obtain magnetic silica gel particles;

[0072] [4] Mix 0.35 g of magnetic silica gel particles with 110 mL of deionized water, adjust the pH of the solution to 10.5, and obtain an aqueous silica gel solution.

[0073] [5] Add 40mL magnesium nitrate and aluminum ...

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Abstract

The invention discloses a preparation method and application of catalytic material based on magnetic layered double hydroxides, and belongs to the technical field of catalysts. The preparation methodmainly comprises the following steps of: preparing magnetic layered double hydroxides by using magnetic silica gel particles as a core, and reacting the magnetic layered double hydroxides with silvernitrate to obtain a magnetic nano-silver catalyst. The prepared magnetic nano-silver catalyst has the characteristics of the large loading capacity, the high activity, the high catalytic efficiency and the stable structure, the prepared magnetic nano-silver catalyst can be quickly separated from mother liquor, is simple and convenient, and can be repeatedly used, and after the silver catalyst is repeatedly used for 10 times, the degradation rate of a target object is still 95% or above.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a preparation method and application of a magnetic layered double metal hydroxide-based catalytic material. Background technique [0002] Double metal hydroxide nanomaterials are materials with abundant raw materials, which not only have good biocompatibility, but also have strong ion exchange capacity. Because this double metal hydroxide has special physical and chemical properties, there is enough free space between the interlayers, and the space can be changed, so it can accommodate the entry of molecules of different sizes, which is conducive to further modification. Studies have shown that after the double metal hydroxide surface is modified with Au, Ag and other particles, the material exhibits superior catalytic performance. The activity of nanocatalysts is related to their particle size, the smaller the particle size, the higher the catalytic activity. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J37/03B01J37/34B01J35/02C02F1/70C02F101/38
CPCB01J35/0033B01J23/8946B01J37/343B01J37/035B01J35/023B01J35/0013B01J35/008C02F1/70C02F2101/38
Inventor 刘双柳程亮徐顺青陈鹏卢静徐毅高军陶亚
Owner CHINESE ACAD OF ENVIRONMENTAL PLANNING
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