Light-free formaldehyde removal catalyst, formaldehyde removal system containing catalyst and purpose thereof

Abstract

The invention relates to a light-free formaldehyde removal catalyst, which can effectively decompose formaldehyde substances in light-free environment and can effectively decompose formaldehyde substances under the condition of no need of external energy. The light-free formaldehyde removal catalyst is prepared from transition metal particles and alkaline carriers; the transition metal particles are loaded onto the surface of the alkaline carriers; after the transition metal particles and the alkaline carriers are in contact with air and / or aldehyde substances, active oxygen species are generated in the interface positions of the transition metal particles and the alkaline carriers; an alkaline carrier-transition metal-active oxygen species structure is formed; the active oxygen species comprise superoxide free radicals, peroxy free radicals and hydroxyl free radicals; the alkaline carrier-transition metal-active oxygen species structure comprises alkaline carrier-transition metal-superoxide free radicals, alkaline carrier-transition metal-hydroperoxide free radicals and / or alkaline carrier-transition metal-hydroxyl radicals. The light-free formaldehyde removal catalyst provided by the invention has the advantages that the formaldehyde removal efficiency is very high; the cost is low; the formaldehyde removal efficiency can reach 99.9 percent to the highest degree.

Description

technical field [0001] The invention relates to the field of environment, in particular to a non-light aldehyde removal catalyst, an aldehyde removal system containing the catalyst and its application. Background technique [0002] In modern society, aldehydes generally exceed the standard after decoration of new houses. Aldehyde is a gas with a strong pungent smell, not only pungent, but also harmful to the human body and has a long incubation period. It is called "the first killer of indoor pollution"; The main cause of leukemia, memory and intelligence decline of teenagers, has been identified as "carcinogenic and teratogenic substances" by the World Health Organization. Therefore, there are various methods for removing aldehydes on the market. Generally speaking, they can be divided into the following categories: [0003] The first category: physical adsorption of porous materials, such as activated carbon, bamboo charcoal and diatomaceous earth, etc., but this method ...

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Problems solved by technology

[0005] The third category: Spraying aldehyde-dissolving enzymes, aldehyde-dissolving enzymes can oxidize aldehydes into acids or reduce them to alcohols, but the toxicity of the products still exists, and spraying high-concentration scavengers in the air will harm people. Create new pollution hazards

[0006] The fourth category: the application of air purifiers. In the case of indoor air pollution, the use of air purifiers can reduce the degree of pollution to a certain extent, but air purifiers can only play an auxiliary and remedial role, and do not mean Can fundamentally eliminate air pollution

At present, there is no technology that can effectively decompose aldehydes once they are released in the absence of light.

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