Preparation method of Mn3O4-MnO2 nano composite material and application thereof

Abstract

The invention relates to a preparation method of Mn3O4-MnO2 nano composite material and an application thereof; the preparation method includes steps of adding tetrahydrate manganese chloride and polyvinylpyrrolidone in de-ionized water, and adding the prepared mixing solution to the de-ionized water; adding sodium hydroxide and reacting; adding potassium permanganate in the reacted solution; keeping the stirring for 3-6 hours, and then cooling to room temperature; performing the centrifugal separation and obtaining precipitate; after alternatively washing the precipitate by de-ionized water and absolute ethyl alcohol, drying and obtaining the Mn3O4-MnO2 nano composite material, wherein the material thickness is 10-30 nm; the prepared nano composite material can be importantly applied to advanced oxidization technology. The process is simple in flow and free from pollution; the production and manufacturing costs of Mn3O4-MnO2 nano composite material can be reduced; meanwhile, the Mn3O4-MnO2 nano composite material prepared by the method can fundamentally degrade the organic pollutant in the water.

Description

technical field [0001] The invention relates to the preparation and application of a composite catalyst, in particular to a Mn 3 o 4 -MnO 2 Preparation methods of nanocomposites and their applications. Background technique [0002] With the development of modern industry, the number of synthetic organic substances is increasing, and the use and discharge of various organic substances have caused the pollution of the surface water environment. These organic pollutants are difficult to degrade in the natural environment and will accumulate in the environment. Substances such as antibiotics, endocrine disruptors, and phthalates are sometimes detected in surface water. The compound toxicity produced by various organic substances may cause Produce greater harm and pose a threat to the sustainability of the ecosystem and human health. [0003] Conventional water treatment processes have a low removal rate for refractory organic matter, and toxic and harmful organic matter will...

AI Technical Summary

Problems solved by technology

However, the current photocatalysts still have problems such as high production cost, complex process and energy loss during the transfer of photogenerated carriers. Studies have shown that photogenerated carriers are easier to transfer between multiple valence states of an element

[0006] Manganese has attracted attention due to its various valence states (+2, +3, +4, +6 and +7), although nano-Mn 3 o 4 and MnO 2 It has broad application prospects in the fields of manufacturing industry and environment, but its preparation process often requires high temperature and high pressure, and the process is complicated, which increases its cost of use.

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