MnO2-ACF material for removing indoor formaldehyde and preparation method thereof

Abstract

The invention discloses an MnO2-ACF material for removing indoor formaldehyde and a preparation method thereof. The material comprises carrier active carbon fiber and MnO2 loaded on the surface of a carrier. The preparation method of the MnO2-ACF material comprises the following steps of firstly dissolving KMnO4, alkaline substances, dispersing agents and template agents into water to prepare a mixed solution; then, dripping the mixed solution into a manganese salt solution; performing reaction to prepare a mixture; finally, soaking the active carbon fiber into the mixture; performing oscillation, washing, drying, calcination and cooling; preparing the MnO2-ACF material. The MnO2-ACF material has the advantages that the MnO2-ACF material provided by the invention can be used for efficiently removing low-concentration formaldehyde contaminants in a room; the stability is high; the service life is long; the cost is low; the repeated use can be achieved; meanwhile, the preparation process is simple; the operation is safe; the cost is lower.

Description

technical field [0001] The invention belongs to the field of preparation of air purification materials, in particular to a kind of MnO used for removing indoor formaldehyde 2 - ACF materials and methods for their preparation. Background technique [0002] Formaldehyde is a serious hazard to human health. It ranks second on the priority list of toxic chemicals in my country and has been identified as a Class I carcinogen by the World Health Organization (WHO) and the International Agency for Research on Cancer (IARC). The problem of indoor formaldehyde pollution has aroused great concern from all walks of life. Studies have shown that short-term exposure to formaldehyde can irritate the eyes, nasal cavity and respiratory tract and cause allergic reactions. Long-term exposure to low-dose formaldehyde can easily increase the possibility of nasopharyngeal cancer, leukemia and death. The "Indoor Air Quality Standard" (part B / T 18883-2002) promulgated by China stipulates that th...

AI Technical Summary

Problems solved by technology

The adsorption method is often unable to effectively remove low-concentration pollutants due to the small capacity of the adsorbent and the non-selectivity of the adsorption, and the desorption is easy to cause secondary pollution; the photocatalytic method needs to be carried out under low ultraviolet light conditions, and has a considerable application limitations, and the conversion efficiency is low; noble metal catalysts are prone to catalyst poisoning, which makes the catalyst invalid, and due to the scarcity and high price of precious metal resources, its promotion and application in room temperature catalytic oxidation formaldehyde removal catalysts are limited. Therefore, whether it is adsorption Neither photocatalysis nor noble metal catalysis can achieve satisfactory results.

Images