Morphology- and pH-dependent peroxidase mimetic activity of nanoceria.

ABSTRACT: The peroxidase mimetic properties of nanoceria have attracted extensive attention in recent years. In this work, the peroxidase mimetic properties of CeO₂ nanocrystals with different morphologies, namely, nanocubes and nanorods, were investigated. Two types of oxidative species, HO˙ radicals and peroxide-like intermediates, were identified in the CeO₂/H₂O₂ systems. The formation of these oxidative species is strongly dependent on the pH value and the morphology of the CeO₂ nanocrystals. The origin of the peroxidase mimetic activity of nanoceria was mainly ascribed to the presence of HO˙ under acidic conditions, whereas the peroxide-like species also played a major role under neutral and basic conditions. CeO₂ nanorods with e

SUBMITTER: Wei X 

PROVIDER: S-EPMC9079050 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature