Cu-doped manganese oxide octahedral molecular sieve catalyst and preparation method and application thereof

Abstract

The invention provides a Cu-doped manganese oxide octahedral molecular sieve catalyst and a preparation method and application thereof. The preparation method comprises the following steps: S1, dissolving bivalent manganese salt in deionized water, and adding an appropriate amount of nitric acid for regulating the pH value to obtain a first solution; S2, dissolving permanganate in deionized waterto obtain a permanganate solution, dropwise adding the obtained permanganate solution in a first solution or dropwise adding the first solution in the permanganate solution, after the dropwise addingis completed, obtaining a mixed solution, adding a copper salt containing metal component solution, and performing reflowing at the temperature of 100-140 DEG C to obtain an intermediate; S3, washingthe intermediate with deionized water, filtering and drying to obtain a black solid; and S4, performing high-temperature calcination to obtain the Cu-doped manganese oxide octahedral molecular sieve catalyst. The catalyst has effective ozone decomposing performance at room temperature.

Description

technical field [0001] The invention relates to the technical field of environmental catalysis, in particular to a copper-doped manganese oxide octahedral molecular sieve catalyst, its preparation method, application and a material for decomposing ozone. Background technique [0002] Ozone is a common oxidizing agent. Prolonged exposure of the human body to ozone can damage the immune function and nervous system. The main source of ozone near the ground surface is the residue after using ozone in the fields of medical and health care, food preservation, water quality treatment and so on. Green, efficient, safe, stable and economical ozonolysis technology is urgently needed by human beings. [0003] The method of catalytic decomposition of ozone at room temperature has the characteristics of high efficiency, safety, stability and economy, and has attracted the attention of the academic circle. Chinese patent CN101357331A uses manganese oxide molecular sieves containing dope...

AI Technical Summary

Problems solved by technology

However, in the M / OMS-2 catalyst prepared by this method, the metal species are located on the surface of the support and fail to enter the framework of OMS-2, that is, the Cu-O-Mn bridge structure cannot be formed, so the metal species and the support The interaction between OMS-2 is weak, and its redox ability is weak

At the same time, the catalyst prepared by this method, due to the synergistic effect of the interaction between the metal and the support, the performance of the catalyst is improved to a certain extent, but if the loading is too large, more active sites will be covered, which will cause a decrease in activity , the ability to influence the OMS-2 catalyst will be greatly weakened

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