Silver-manganese oxide composite catalyst and preparation method and application thereof

Abstract

The invention provides a silver-manganese oxide composite catalyst and a preparation method and application thereof. The preparation method comprises the following steps that an alkaline solution is added into a mixed solution of a manganese source and a silver source to react to generate solid precipitate; and the obtained solid precipitate is roasted to obtain the silver-manganese oxide composite catalyst. The silver-manganese oxide composite catalyst is prepared through a co-precipitation-roasting method, the catalyst forms a manganese-barium ore crystal structure, the electron transfer rate is high, the catalytic ozone decomposition activity is high, and when the relative humidity is about 70%, the ozone conversion rate can reach 80% or above in 6 h. The catalyst preparation method issimple and fast, the preparation process is high in controllability, adopted raw materials and the operating process are low in cost, and industrial production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a silver-manganese oxide composite catalyst, its preparation method and application, in particular to a silver-manganese oxide composite catalyst, its preparation method and its application in the field of ozone decomposition. Background technique [0002] Ozone (O 3 ) is an allotrope of oxygen, which is unstable at room temperature and has a double-edged sword effect on the environment on which human beings live. In the stratosphere, ozone is beneficial to the living environment of human beings, and it can resist harmful The ultraviolet rays of the earth directly shine on the earth, but near the surface, the ozone is more harmful, and it will have different degrees of impact on the human skin, immune system and nervous system. Part of the ozone that people are exposed to comes from the ozone generated by photochemical reactions of nitrogen oxides and volatile organic compounds ...

AI Technical Summary

Problems solved by technology

CN 102513106A discloses a high-efficiency ozone decomposition catalyst at room temperature, which uses manganese nitrate, cerium nitrate, and silver nitrate as precursors, supplemented with precipitants, oxidants, and templates for hydrothermal reaction, and then roasts. Although the catalyst can be Efficiently decomposes ozone at room temperature, but the preparation method is complicated, the cost is high, and the catalyst is difficult to controllably synthesize

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