Formaldehyde removal catalyst and preparation method and application thereof

Abstract

The invention provides a formaldehyde removal catalyst as well as a preparation method and application thereof. The formaldehyde removal catalyst comprises a catalyst material and a porous carrier, wherein the catalyst material is nanoscale particles and can be used for catalytic oxidation of formaldehyde at room temperature, and the catalyst material is loaded on the surface of the porous carrier. The catalyst material is loaded on the porous carrier, so that the specific surface area of the catalyst material is increased, catalytic oxidation of formaldehyde is facilitated, formaldehyde staysin the porous material for a long time, and complete catalytic decomposition of formaldehyde is facilitated.

Description

technical field [0001] The application belongs to the technical field of catalysts, and in particular relates to a catalyst for removing formaldehyde and its preparation method and application. Background technique [0002] As interior decoration becomes the fashion of people's life, the problem of indoor air pollution becomes more and more serious. Formaldehyde is one of the air pollutants, which is highly toxic and irritating to mucous membranes, and is recognized as a carcinogen and teratogenic substance by the World Health Organization. The concentration of formaldehyde in most of the newly decorated rooms exceeds the hygienic standard, which has caused great harm to the human body. Long-term inhalation can cause nasal cavity, mouth, throat cancer, digestive system cancer, lung cancer, skin cancer, and leukemia. Indoor furniture, paint, and interior decoration all volatilize a large amount of formaldehyde, which lasts for several years and endangers people's health and ...

AI Technical Summary

Problems solved by technology

At present, the commonly used catalysts on the market are noble metal catalysts, which have excellent aldehyde removal performance, but under low temperature conditions, the aldehyde removal effect is not good

Although it has been reported that the porous structure modified by tetrabutyl titanate and silane coupling agent was used as a carrier at room temperature, and Ag x -The core-grain structure of Pt is a low-temperature noble metal catalyst as the active component. The modification in this technology can effectively improve the hydrophobicity of the porous carrier and prevent the deactivation of the catalyst caused by the desorption of water on the catalyst. There is a synergistic effect between them, resulting in higher activity so that the reaction can be carried out at a lower temperature and the performance is stable, but the cost of the noble metal catalyst is higher, and the cost of replacing the filter screen is higher, which limits its actual use value

If non-precious metal catalysts can be used, the cost can be greatly reduced, but their activity, stability and aldehyde removal effect at low temperature are generally inferior to noble metal catalysts

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