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Cerium-manganese composite oxide catalyst as well as preparation method and application thereof

A composite oxide and catalyst technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve problems such as environmental pollution and achieve high ozone catalytic decomposition activity Effect

Inactive Publication Date: 2017-12-29
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the thermal stability of the cerium-manganese catalyst is only 170°C, and potassium permanganate is required in its preparation process, which pollutes the environment

Method used

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  • Cerium-manganese composite oxide catalyst as well as preparation method and application thereof
  • Cerium-manganese composite oxide catalyst as well as preparation method and application thereof
  • Cerium-manganese composite oxide catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A cerium-manganese composite oxide catalyst has the following chemical composition: CeMn 10 o x .

[0053] The preparation method of cerium-manganese composite oxide catalyst comprises the steps:

[0054] (1) Dissolve 3.375g of manganese sulfate in 80mL of deionized water and stir until completely dissolved;

[0055] (2) add 0.852g cerium nitrate in the solution that step (1) obtains, fully stir until solid dissolves completely, then add ammonium persulfate (concentration after ammonium persulfate dissolves completely is 45.75mg / mL) and stir for a while, After complete dissolution, transfer it to a 100mL high-pressure hydrothermal kettle, and conduct a hydrothermal reaction at 90°C for 24 hours; cool the hydrothermal reaction product to room temperature, filter and wash until neutral, and dry at 80°C for 12 hours to obtain a solid product;

[0056] (3) Calcining the solid product at 300° C. for 2 hours to obtain the cerium-manganese composite oxide catalyst.

[0057...

Embodiment 2

[0064] A cerium-manganese composite oxide catalyst has the following chemical composition: CeMn 15 o x .

[0065] Its preparation method is the same as the preparation method described in Example 1 except that the mass ratio of manganese sulfate to cerium nitrate is 6:1.

Embodiment 3

[0067] A cerium-manganese composite oxide catalyst has the following chemical composition: CeMn 20 o x .

[0068] Its preparation method is the same as the preparation method described in Example 1 except that the mass ratio of manganese sulfate to cerium nitrate is 8:1.

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Abstract

The invention provides a cerium-manganese composite oxide catalyst as well as a preparation method and application thereof. Chemical components of the cerium-manganese composite oxide catalyst are as follows: CeMnaOx, wherein the valence state of Mn is mainly valence 4 and the value of a is selected from natural numbers between 10 to 25. The preparation method of the catalyst comprises the following steps: firstly, mixing ammonium persulfate with a solution containing a cerium source and a bivalent manganese source and then completely dissolving to obtain a reaction solution; secondly, carrying out hydrothermal reaction on the reaction solution; carrying out post treatment on a reaction product to obtain a solid product; thirdly, roasting the solid product to obtain the cerium-manganese composite oxide catalyst. The cerium-manganese composite oxide catalyst has the advantages of excellent moisture resistance, high decomposition rate of ozonolysis under the condition of high humidity and high airspeed and high heat stability; in addition, the preparation method of the cerium-manganese composite oxide catalyst is simple and is suitable for decomposing ozone.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a cerium-manganese composite oxide catalyst, its preparation method and application, in particular to a cerium-manganese composite oxide catalyst capable of decomposing ozone at room temperature, high humidity and high space velocity, a preparation method and its application. Background technique [0002] Ozone (O 3 ) and oxygen (O 2 ) is an allotrope of oxygen, which has a special fishy smell and is lavender in color. It has a double-edged sword effect on the environment on which human beings depend. . In the stratosphere, ozone can resist the harmful ultraviolet rays that directly irradiate the earth. However, near the surface, ozone will have varying degrees of impact on the human skin, immune system, and nervous system. Therefore, we must attach great importance to the hazards of ozone. [0003] On October 1, 2015, the US Environmental Protection Agency (EPA) tightened the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01D53/86B01D53/66
CPCB01D53/8675B01J23/34B01J37/10B01J35/40B01J35/51Y02A50/20
Inventor 贺泓马金珠李晓彤张长斌
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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