Enhanced Activation of Peroxymonosulfate via Sulfate Radicals and Singlet Oxygen by SrCoxMn1−xO3 Perovskites for the Degradation of Rhodamine B

Perovskite is of burgeoning interest in catalysis, principally due to such material having high thermal stability, modifiable variability, ferromagnetism, and excellent catalytic performance in peroxomonosulfate (PMS) activation. In this study, the SrCoxMn1−xO3 perovskites with different Mn doping w...

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Published in:Processes 2023-04, Vol.11 (4), p.1279
Main Authors: Shao, Penghui, Yin, Xiping, Yu, Chenyu, Han, Shuai, Zhao, Baohuai, Li, Kezhi, Li, Xiang, Yang, Zhenyu, Yuan, Zhiwei, Shi, Qinzhi, Ren, Jing, Hu, Haiqiang, Cui, Kai, Li, Tengfei, Jiang, Jun
Format: Article
Language:English
Subjects:
Bisphenol A
Catalysis
Catalysts
Catalytic activity
Degradation
Doping
Efficiency
Ferromagnetism
Nitrates
Oxidation
Oxygen
Oxygen enrichment
Perovskites
Pollutants
Radicals
Rhodamine
Scanning electron microscopy
Singlet oxygen
Sol-gel processes
Thermal stability
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Summary:Perovskite is of burgeoning interest in catalysis, principally due to such material having high thermal stability, modifiable variability, ferromagnetism, and excellent catalytic performance in peroxomonosulfate (PMS) activation. In this study, the SrCoxMn1−xO3 perovskites with different Mn doping were synthesized by a facile sol-gel method for peroxymonosulfate (PMS) activation to degrade Rhodamine B. The obtained SrCo0.5Mn0.5O3 perovskite exhibited the best catalytic efficiency, as Rhodamine B (40 mg/L) was removed completely within 30 min. In the system of SrCo0.5Mn0.5O3–PMS, several reactive species were produced, among which sulfate radicals and the singlet oxygen mainly contributed to Rhodamine B degradation. The relatively high catalytic performance could be attributed to the coupled redox cycle between Mn and Co, and the abundant oxygen vacancies. Moreover, the SrCo0.5Mn0.5O3 catalyst showed excellent stability and reusability, maintaining a high catalytic activity after several cycling tests. This study demonstrated that the Mn doping of SrCoO3 could not only enhance the B-site activation in SrCo0.5Mn0.5O3 but also enrich the oxygen vacancies, thus improving the efficiency of PMS activation.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr11041279