Carbon-supported manganese oxide / manganese carbide composite catalyst and its preparation method and application

CN117427681BActive Publication Date: 2025-09-23CHINA UNIV OF GEOSCIENCES (BEIJING)
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Patent Information

Application Number
CN202311534379.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-11-17
Publication Date
2025-09-23
Estimated Expiration
2043-11-17

AI Technical Summary

Technical Problem

Existing technologies make it difficult to activate peroxymonosulfate catalysts efficiently and at low cost, and they lack stability and recyclability, making it difficult to quickly remove organic pollutants such as rhodamine B from water.

Method used

A carbon-supported manganese oxide/manganese carbide composite catalyst is used, and manganese oxide and manganese carbide nanoparticles are loaded on nitrogen-doped carbon nanospheres. Multivalent manganese ions and nitrogen-doped carbon supports are used to synergistically activate peroxymonosulfate to generate active groups such as sulfate radicals and singlet oxygen, which rapidly oxidize and degrade organic pollutants.

Benefits of technology

It achieves efficient and rapid degradation of organic pollutants, has strong catalytic activity, good stability, and can be recycled multiple times, making it suitable for industrial applications.

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Abstract

The present invention discloses a carbon-supported manganese oxide / manganese carbide composite catalyst, its preparation method, and application. The catalyst comprises manganese oxide, manganese carbide, and a nitrogen-doped carbon support. The preparation method comprises adding a manganese ion solution and dopamine hydrochloride to a tris (hydroxymethylaminomethane) buffer solution, stirring for 24 hours, centrifugally drying, and then calcining the mixture at 900°C in a nitrogen atmosphere for 2 hours to obtain the catalyst. The carbon-supported manganese oxide / manganese carbide composite catalyst of the present invention, using nitrogen-doped carbon as a support and composite transition metal oxide / carbide nanoparticles, exhibits advantages such as efficient peroxymonosulfate activation, high catalytic activity, strong redox capacity, excellent stability, and recyclability. It is capable of efficiently and rapidly degrading organic pollutants (99% of rhodamine B dye can be removed in 5 minutes), has high practical value, and promising application prospects. The preparation method of the carbon-supported manganese oxide / manganese carbide composite catalyst of the present invention has the advantages of a simple synthesis method, low raw material cost, low energy consumption, short time consumption, and easily controllable conditions. It is suitable for continuous large-scale batch production and facilitates industrial utilization.
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Citation Information

Patent Citations

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