Preparation method of visible light catalyzing material silver tantalite for completely and rapidly degrading formaldehyde and benzene of indoor environment

Abstract

The invention belongs to an operative technology in the field of environmental engineering, and provides a photocatalytic material (Ag2Ta4O11/Ag/Ag8(Ta0.5Nb0.5)26O69) capable of completely and rapidlydegrading formaldehyde and benzene of an indoor environment under visible light to achieve a purpose of purifying air. A three-phase photocatalyst capable of efficiently oxidizing the formaldehyde and the benzene of the indoor environment under visible light is prepared from ethanol, tantalum pentoxide, niobium pentoxide, silver nitrate and polyvinylpyrrolidone through a simple ethanol refluxingmethod, a solid thermal method and in-situ reduction. Only a small amount of the catalyst needs to be horizontally laid on the surface of solid, then the formaldehyde and the benzene can be oxidized into carbon dioxide and water under illumination of the visible light, secondary pollution is avoided, and moreover, the catalyst is reusable and is quite high in stability and quite good in selectivity. The prepared catalyst is toxic-free and harmless, and is convenient to recycle and low in cost of raw materials. The catalyst meets the requirement for environment purification, and is expected tobe applied to the fields of indoor air purification such as air purifiers and internal wall coatings.

Description

technical field [0001] The invention relates to a synthesis method of a three-phase catalyst and its application in purifying indoor formaldehyde and benzene under visible light, relates to the technical field of indoor pollution treatment in engineering, and relates to the field of material synthesis and photocatalysis technically. Background technique [0002] Indoor formaldehyde and benzene mainly come from wooden furniture, wooden floors, and various boards, adhesives, paints, etc., and gradually volatilize and discharge into relatively closed rooms over time. For a long time, due to long-term indoor activities, human It can cause serious impacts on the health of human beings, causing respiratory diseases such as human immunity, allergies, asthma, and even the occurrence of cancer. Various methods have been proposed to purify the indoor environment, including adsorption, biodegradation, thermal degradation, and photocatalytic degradation technologies, among which photoca...

AI Technical Summary

Problems solved by technology

However, due to the high recombination rate of photogenerated electrons and holes, the catalytic performance of this material is low, which has become the biggest bottleneck for its degradation of indoor formaldehyde and benzene.

Images