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

Singlet oxygen ( O ) 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 O is acknowledged as a key strategy to mitigate water production costs and ensure water supply safety. Herein, we synthesized MnO intercalated MnFe layered double hydroxides (MF-MnO ) to selectively produce O through the activation of PMS. The distinctive confined structure endowed MF-MnO with a special pathway for the PMS activation. The direct oxidation of BPA on the intercalated MnO induced the charge imbalance in the MnFe-LDH layer, resulting in the selective generation of O . Moreover, acceptable activity deterioration of MF-MnO was observed in a 10 h continuous degradation test in actual water, substantiating the application potential of MF-MnO . This work presents a novel catalyst for the selective production of O , and evaluates its prospects in the remediation of micro-polluted water.