Radiation Chemistry Provides Nanoscopic Insights into the Role of Intermediate Phases in CeO₂ Mesocrystal Formation.

ABSTRACT: The role of intermediate phases in CeO₂ mesocrystal formation from aqueous Ce^III solutions subjected to γ-radiation was studied. Radiolytically formed hydroxyl radicals convert soluble Ce^III into less soluble Ce^IV . Transmission electron microscopy (TEM) and X-ray diffraction studies of samples from different stages of the process allowed the identification of several stages in CeO₂ mesocrystal evolution following the oxidation to Ce^IV : (1) formation of hydrated Ce^IV hydroxides, serving as intermediates in the liquid-to-solid phase transformation; (2) CeO₂ primary particle growth inside the intermediate phase; (3) alignment of the primary particles into "pre-mesocrystals" and subsequently to mesocrysta

SUBMITTER: Li Z 

PROVIDER: S-EPMC9303918 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature