Degradation of methylene blue by three-dimensional heterogeneous electro-Fenton system with CuFeKao particle electrode
CuFe2O4/Fe2O3/Kaolin(CuFeKao) catalytic particle electrode was synthesized by sol-gel method and used in three-dimensional heterogeneous electro-Fenton system to degrade Methylene blue(MB). XRD results showed that CuFeKao was a composite material composed of CuFe2O4, Fe2O3 and Kaolin. Through compar...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Industrial Water Treatment
2025-02-01
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| Series: | Gongye shui chuli |
| Subjects: | |
| Online Access: | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2024-0250 |
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| Summary: | CuFe2O4/Fe2O3/Kaolin(CuFeKao) catalytic particle electrode was synthesized by sol-gel method and used in three-dimensional heterogeneous electro-Fenton system to degrade Methylene blue(MB). XRD results showed that CuFeKao was a composite material composed of CuFe2O4, Fe2O3 and Kaolin. Through comparative experiments, it was found that three-dimensional electrochemical interactions could increase the yield of H2O2, and heterogeneous electro-Fenton systems could catalyze the in-situ conversion of H2O2 to ·OH. Compared with 3D systems using CuFe2O4/Fe2O3 or Kaolin as particle electrode and 2D systems, the 3D/EF/CuFeKao system exhibited the highest ·OH yield and the best MB degradation effect. The degradation conditions of the 3D/EF/CuFeKao system were optimized by single factor experiments. Under the optimized conditions, the removal rates of MB and TOC could reach 99.81% and 58.13% respectively after 60 minutes of reaction. The quenching of free radicals confirmed that the system contained two reactive oxygen species, ·OH and O2·-, whose relative proportions could be regulated by solution pH. Mechanism analysis showed that the main mechanism of MB degradation in the 3D/EF/CuFeKao system is the heterogeneous electro-Fenton reaction occurring on the surface of the CuFeKao particle electrode. |
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| ISSN: | 1005-829X |