Zno / co3o4 composite oxide catalyst, preparation method and application thereof
CN121130901BActive Publication Date: 2026-05-29JILIN JIANZHU UNIVERSITY
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JILIN JIANZHU UNIVERSITY
- Filing Date
- 2025-11-17
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
Existing metal oxide catalysts are inefficient and energy-intensive in removing bisphenol A, and it is difficult to precisely control the concentration and distribution of oxygen vacancies, which affects catalytic activity.
Method used
The ZnO/Co3O4 composite oxide catalyst was prepared by mixing zinc nitrate, cobalt nitrate and 2-methylimidazole, followed by high-temperature calcination and grinding to form a heterogeneous Co-Ov-Zn type asymmetric oxygen vacancies, thereby improving catalytic activity.
Benefits of technology
The activation efficiency of persulfate was improved, enabling efficient removal of bisphenol A. The catalyst was stable over a wide pH range, reducing energy consumption and improving reaction selectivity.
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Abstract
The application belongs to the technical field of metal oxide catalysts, and provides a ZnO / Co3O4 composite oxide catalyst, a preparation method and application thereof, and comprises the following steps: mixing zinc nitrate, cobalt nitrate and 2-methyl imidazole by ball milling, then putting the mixture into a crucible, performing high-temperature calcination after temperature rising, and then grinding the obtained product; wherein the mass ratio of the zinc nitrate, the cobalt nitrate and the 2-methyl imidazole is 1.6-2.4:3.12-2.32:2.6. The ZnO / Co3O4 composite oxide catalyst containing a large number of asymmetric oxygen vacancies is prepared, wherein the introduction of Zn increases the asymmetry of the oxygen defects on the surface of the material, the type of the oxygen defects on the surface of the material is changed from Co-Ov-Co to Co-Ov-Zn, the local electronic environment is changed, the activation efficiency of persulfate is improved, and thus the ZnO / Co3O4 composite oxide catalyst can be applied to removal of bisphenol A.
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