AI Article Synopsis
- Sulfate radical mediated advanced oxidation processes (SR-AOPs) are gaining attention for effectively degrading emerging contaminants, but balancing the reactivity and stability of these systems remains challenging.
- A novel cubic CaTiO perovskite catalyst, enhanced with cobalt, was developed to activate peroxymonosulfate (PMS), resulting in 98% degradation of amitriptyline within 60 minutes.
- The study revealed that the redox properties of cobalt and lattice oxygen play crucial roles in PMS activation and the subsequent generation of reactive species, offering a promising approach for improving water treatment methods.
Article Abstract
Sulfate radical mediated advanced oxidation processes (SR-AOPs) have emerged as a promising alternative for emerging contaminants degradation. However, high activity and great stability are commonly difficult to juggle, and the structure-activity correlations are still ambiguous. This study constructed the cubic CaTiO perovskite modified by highly-dispersed cobalt for peroxymonosulfate (PMS) activation to improve the specific lattice plane exposure and reduce the metal leaching simultaneously. 98% of amitriptyline (AMT) degradation was achieved within 60 min under the condition of 200 mg/L Co0.1-CTO and 100 mg/L PMS. The results indicated that surface Co/Co redox couple and lattice oxygen were responsible for PMS activation, and the evolution of OH, SO and O were revealed. According to density functional theory (DFT) calculations, the highly-dispersed Co on cubic surface effectively captured PMS and promoted electron transfer for the generation of OH and SO, while more oxygen atoms exposed on Co0.1-CTO(200) surface facilitated the generation of O. Briefly, this study provides a novel strategy of catalyst synthesis in PMS activation for water treatment.
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| http://dx.doi.org/10.1016/j.jhazmat.2023.132191 | DOI Listing |
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