Molecular sieve-based Ce-Mn oxide porous photocatalyst, and preparation method and application thereof

Abstract

The invention provides a molecular sieve-based Ce-Mn oxide porous photocatalyst, and a preparation method and an application thereof, and relates to the technical field of nanomaterial photocatalysis.The porous photocatalyst contains a large amount of meso-pores, and the active components of the porous photocatalyst composed of cerium oxide and manganese oxide, wherein the manganese oxide existsin an amorphous state, the cerium oxide exists in a crystalline state, and cerium atoms in the cerium oxide are partially substituted by manganese atoms. The preparation method comprises the followingsteps: certain amounts of cerium acetate, manganese acetate and a molecular sieve are weighed, and are added into deionized water, heating and stirring are carried out until the added substances arecompletely dissolved, the obtained solution is stirred and reacted, and then is ultrasonically treated, solid particles in the solution are separated from the solution, and the obtained solid is driedat a low temperature, and then is calcined at a high temperature to prepare the molecular sieve-based Ce-Mn oxide porous photocatalyst. The molecular sieve-based Ce-Mn oxide photocatalyst of the invention has the advantages of increase of photocatalytic active sites, expansion of the visible light response range, inhibition of the regeneration of photogenerated charges, and improved visible lightphotocatalytic activity.

Description

technical field

[0001] The invention relates to the technical field of photocatalysis of nanomaterials, in particular to a molecular sieve-based Ce-Mn oxide porous photocatalyst and its preparation method and application. Background technique

[0002] With the development of science and technology and the progress of society, people pay more and more attention to the problem of environmental pollution, and the degradation of organic matter in sewage treatment has always been a difficulty and a hot spot. According to records, about 70 tons of usable organic dyes are commercially produced every year. These organic dyes can absorb and reflect sunlight entering the water, interfere with the growth of bacteria and other organisms, and at the same time, they are highly toxic and chemically stable, and difficult to biodegrade. Once discharged into the Aquatic ecosystems will cause very serious harm to the ecological environment (source: Liu Xingyan, Xiong Cheng, Xu Yonggang, Tan Yu...

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