Cerium-manganese catalyst for decomposing ozone at room temperature in high humidity as well as preparation method and application of cerium-manganese catalyst

Abstract

The invention discloses a cerium-manganese catalyst for decomposing ozone at room temperature in high humidity as well as a preparation method and an application of the cerium-manganese catalyst. The cerium-manganese catalyst comprises the following chemical composition: CeMnaOx, wherein a is a natural number being 1 to 8. The method comprises the following steps: (1) dissolving a divalent manganese source into deionized water, sufficiently stirring till the divalent manganese source is completely dissolved, and subsequently adjusting the pH value to be 4-5; (2) adding a cerium source into the solution obtained in the step (1), sufficiently stirring till the solid is completely dissolved, then slowly dropping a potassium permanganate solution, stirring, and subsequently moving the solution into a high pressure hydrothermal kettle, and performing hydrothermal reaction for 24 hours at 100 DEG C; and (3) cooling, performing centrifugal washing, and drying, thereby obtaining the cerium-manganese catalyst for decomposing ozone at room temperature in high humidity. The cerium-manganese catalyst shows relatively high ozone catalysis and decomposition activity when the relative humidity is 90%, and can be applied to ozone decomposition at room temperature in high humidity.

Description

technical field [0001] The invention relates to a cerium-manganese catalyst for decomposing ozone at room temperature and high humidity, a preparation method and an application thereof, belonging to the technical field of catalysts. Background technique [0002] Ozone (O 3 ) is an unstable lavender gas with a special fishy smell, which has a double-edged sword effect on our living environment. In the stratosphere, ozone can resist ultraviolet rays directly irradiating the earth, which is beneficial to our living environment. However, near the surface, ozone is very harmful and will have varying degrees of impact on the human skin, immune system, and nervous system. , so we must attach great importance to the harm of ozone. [0003] The World Health Organization stipulates that the concentration of ozone in the working environment for 8 hours of continuous work cannot exceed 0.1ppm (4×10 -9 mol / L). In recent years, due to its strong oxidation properties, ozone has been wi...

AI Technical Summary

Problems solved by technology

However, the existing catalysts still have problems such as high cost, poor humidity resistance, and low ozone decomposition rate.

[0005] CN1785507A discloses an ozone decomposition catalyst and its preparation method, which is characterized in that manganese oxide is used as the main active component, and alkali metal or alkaline earth metal is added as the auxiliary active component, and it is loaded on metal or ceramic honeycomb by spraying process On the carrier, the preparation process is relatively complicated

However, both catalysts require the use of noble metals, which limits their wide application.

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