MnFe layered double hydroxides confined MnO x for peroxymonosulfate activation: A novel manner for the selective production of singlet oxygen.

Singlet oxygen ( ¹ O ₂ ) is a reactive species for the selective degradation of stubborn organic pollutants. Given its resistance to harsh water environment, the effective and exclusive generation of ¹ O ₂ is acknowledged as a key strategy to mitigate water production costs and ensure water supply safety. Herein, we synthesized MnO _x intercalated MnFe layered double hydroxides (MF-MnO _x ) to selectively produce ¹ O ₂ through the activation of PMS. The distinctive confined structure endowed MF-MnO _x with a special pathway for the PMS activation. The direct oxidation of BPA on the intercalated MnO _x induced the charge imbalance in the MnFe-LDH layer, resulting in the selective generation of ¹ O ₂ . Moreover, acceptable activity deterioration of MF-MnO _x was observed in a 10 h continuous degradation test in actual water, substantiating the application potential of MF-MnO _x . This work presents a novel catalyst for the selective production of ¹ O ₂ , and evaluates its prospects in the remediation of micro-polluted water.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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