Role of Electronegativity in Environmentally Persistent Free Radicals (EPFRs) Formation on ZnO.

ABSTRACT: Environmentally persistent free radicals (EPFRs), a group of emerging pollutants, have significantly longer lifetimes than typical free radicals. EPFRs form by the adsorption of organic precursors on a transition metal oxide (TMO) surface involving electron charge transfer between the organic and TMO. In this paper, dihalogenated benzenes were incorporated to study the role of electronegativity in the electron transfer process to obtain a fundamental knowledge of EPFR formation mechanism on ZnO. Upon chemisorption on ZnO nanoparticles at 250 °C, electron paramagnetic resonance (EPR) confirms the formation of oxygen adjacent carbon-centered organic free radicals with concentrations between 10¹⁶ and 10¹⁷ spins/g. The radical concentrations show a trend of 1,2-dibromoben

SUBMITTER: Ahmed SM 

PROVIDER: S-EPMC10983065 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature