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

Environ Pollut. 2024 Mar 26;348:123865. doi: 10.1016/j.envpol.2024.123865. Online ahead of print.ABSTRACTSinglet oxygen (1O2) 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 1O2 is acknowledged as a key strategy to mitigate water production costs and ensure water supply safety. Herein, we synthesized MnOx intercalated MnFe layered double hydroxides (MF-MnOx) to selectively produce 1O2 through the activation of PMS. The distinctive confined structure endowed MF-MnOx with a special pathway for the PMS activation. The direct oxidation of BPA on the intercalated MnOx induced the charge imbalance in the MnFe-LDH layer, resulting in the selective generation of 1O2. Moreover, acceptable activity deterioration of MF-MnOx was observed in a 10 h continuous degradation test in actual water, substantiating the application potential of MF-MnOx. This work presents a novel catalyst for the selective production of 1O2, and evaluates its prospects in the remediation of micro-polluted water.PMID:38548162 | DOI:10.1016/j.envpol.2024.123865
Source: Environmental Pollution - Category: Environmental Health Authors: Source Type: research