Regulating nonradicals generation through peroxymonosulfate activation via localized dipole to enhance wastewater biodegradability.

ABSTRACT: It is still greatly desirable to activate peroxymonosulfate (PMS) forming nonradicals for the removal of electron-rich contaminants in complex water matrices. However, achieving this on heterogeneous metal-based catalysts with uniform electron distribution remains challenging due to the asymmetric structure of PMS molecules (H-O-O-SO₃^-). Here, inspired by the dipole effect, we design a Co-doped ZnO catalyst (ZOC) to break charge symmetry at active sites and enhance nonradicals generation. The high charge density at Co sites facilitates two-electron transfer, promoting O-O and O-H bond cleavage to form high-valent cobalt-oxo (Co^IV=O), while positively polarized Zn sites drive PMS self-decomposition to generate singlet oxygen (¹O₂). As a

SUBMITTER: Zhao Z 

PROVIDER: S-EPMC12214739 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature