Hydrothermal synthesis of MnO<sub>2</sub>/SiC activated peroxymonosulfate for degradation of methylene blue

CHEN Yinjie; LI Li; CAI Xinyu; ZHANG Wenjuan; ZHANG Wenqi; LI Guanghui; RAO Pinhua

doi:10.12299/jsues.23-0172

Volume 38 Issue 2

Jun. 2024

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Article Navigation > Journal of Shanghai University of Engineering Science > 2024 > 38(2): 139-145

CHEN Yinjie, LI Li, CAI Xinyu, ZHANG Wenjuan, ZHANG Wenqi, LI Guanghui, RAO Pinhua. Hydrothermal synthesis of MnO2/SiC activated peroxymonosulfate for degradation of methylene blue[J]. Journal of Shanghai University of Engineering Science, 2024, 38(2): 139-145. doi: 10.12299/jsues.23-0172

Citation:

CHEN Yinjie, LI Li, CAI Xinyu, ZHANG Wenjuan, ZHANG Wenqi, LI Guanghui, RAO Pinhua. Hydrothermal synthesis of MnO₂/SiC activated peroxymonosulfate for degradation of methylene blue[J]. Journal of Shanghai University of Engineering Science, 2024, 38(2): 139-145. doi: 10.12299/jsues.23-0172

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Hydrothermal synthesis of MnO₂/SiC activated peroxymonosulfate for degradation of methylene blue

doi: 10.12299/jsues.23-0172

a.
School of Chemistry and Chemical Engineering
b.
Innovation Center of Environment and Resource, Shanghai University of Engineering Science, Shanghai 201620, China

Received Date: 2023-07-29
Publish Date: 2024-06-30

Abstract

Abstract

The degradation of organic pollutants by transition metal activated peroxymonosulfate (PMS) has important application value in the field of advanced oxidation. MnO₂/SiC composite catalyst was prepared by hydrothermal method on the surface of silicon carbide (SiC), which was used to activate PMS to degrade and remove methylene blue (MB) from water. The results show that MnO₂ is uniformly attached to the surface of SiC in the form of particles, and the removal rate of MB by MnO₂/SiC-PMS system reaches 99% within 40 min. The MnO₂/SiC-PMS system can achieve high degradation efficiency of MB over a wide pH range (5.0~9.0), while 5 mmol/L Cl⁻and NO⁻ ₃ had no significant effect on the MnO₂/SiC-PMS system. Phosphate and bicarbonate have quenching effect on oxidative free radicals, leading to a decrease in the degradation efficiency of MB in the MnO₂/SiC PMS system. The results of free radical quenching experiments indicate that $ {\text{O}}_{\text{2}}^{{-·}} $ plays a major role in the MnO₂/SiC-PMS system. In addition, MnO₂/SiC has good recyclability.
- hydrothermal method,
- manganese dioxide (MnO₂),
- silicon carbide (SiC),
- peroxymonosulfate (PMS),
- methylene blue (MB)

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References(24)

References

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