Ruthenium-doped manganese hydroxyoxide catalysts, their preparation methods and applications

The preparation of nano-sized manganese hydroxyl oxide catalysts by hydrothermal method and doping with ruthenium metal solved the problem of low activation efficiency of PMS-AOPs catalysts, and achieved efficient degradation of phenol and other pollutants, with significantly improved catalyst stability and degradation efficiency.

CN118513051BActive Publication Date: 2026-07-17HEBEI UNIV OF TECH
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Patent Information

Application Number
CN202410570771.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-05-09
Publication Date
2026-07-17
Estimated Expiration
2044-05-09

AI Technical Summary

Technical Problem

In the prior art, the catalyst activation efficiency of peroxymonosulfate-based advanced oxidation systems (PMS-AOPs) is low, resulting in low pollutant degradation efficiency, especially for phenol, and the catalyst stability is insufficient.

Method used

Nano-sized manganese hydroxyoxide was prepared by a hydrothermal method, and a ruthenium-doped manganese hydroxyoxide catalyst was prepared by doping with ruthenium metal. This catalyst was used to activate PMS to degrade pollutants, thereby improving catalytic activity and stability.

Benefits of technology

It achieves 100% degradation efficiency of phenol and exhibits high efficiency in the degradation of various pollutants. The catalyst maintains high activity after 5 cycles of testing. The preparation method is simple, environmentally friendly and low in cost.

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Abstract

This invention discloses a ruthenium-doped manganese hydroxyoxide catalyst, its preparation method, and its applications. The preparation method includes: mixing nano-manganese hydroxyoxide, a ruthenium source, and water until homogeneous at room temperature; hydrothermally reacting at 160–180°C for 6–8 hours; filtering to obtain a first precipitate; washing and drying the first precipitate to obtain the ruthenium-doped manganese hydroxyoxide catalyst. The ruthenium-doped manganese hydroxyoxide catalyst of this invention exhibits high catalytic activity, achieving a 100% degradation efficiency for phenol, and also demonstrates high degradation efficiency for various pollutants. Furthermore, it exhibits good stability, maintaining high catalytic degradation activity even after five cycles of testing.
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