Cobalt-based MOF derivative catalyst and preparation method and application thereof

By controlling the pyrolysis temperature and time in an air atmosphere, a highly active Co3O4 catalyst was prepared, which solved the problem of insufficient low-temperature activity of cobalt-based oxide catalysts in the prior art and achieved efficient catalytic oxidation of toluene at low temperatures.

CN122124796APending Publication Date: 2026-06-02FUJIAN JINHUANG ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Application Number
CN202512039702.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-31
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing technologies have failed to fully reveal how to maximize the low-temperature activity of cobalt-based oxide catalysts through the systematic regulation of a single variable—especially the pyrolysis atmosphere and temperature of the CoMOF74 precursor. Furthermore, traditional methods suffer from problems such as easy agglomeration of metal particles, insufficient exposure of active sites, and inadequate low-temperature activity.

Method used

The cobalt-based MOF derivative catalyst was prepared by pyrolysis in air at a heating rate of 5-12℃/min within the range of 350℃ to 450℃, especially by isothermal treatment at 390℃ to 410℃ for 3-5 hours, to ensure the generation of highly active Co3O4.

Benefits of technology

The prepared catalyst exhibits excellent low-temperature catalytic oxidation capability for low concentrations of toluene, with a T90 as low as 195℃, which is significantly better than existing technologies. Moreover, the method is simple, economical, and easy to repeat, making it suitable for large-scale production.

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Abstract

The invention belongs to the technical field of environmental catalytic materials and air pollution treatment, and particularly relates to a cobalt-based MOF derivative catalyst and a preparation method and application thereof. The preparation method comprises the following steps: by taking CoMOF74 as a precursor, pyrolyzing for 35 hours at 350450 DEG C in an air atmosphere, so as to obtain the cobalt-based MOF derivative catalyst. According to the method, the precursor is converted into the Co3O4-based catalyst with high crystallinity, abundant surface pore channels and fully exposed active sites by precisely regulating and controlling the pyrolysis atmosphere and temperature. The catalyst shows excellent activity in low-temperature catalytic oxidation of toluene, the minimum T90 can reach 195 DEG C, the preparation process is simple, the reproducibility is good, and the catalyst is suitable for efficient purification of low-concentration toluene.
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