Porous CeO₂ nanozyme with visible-light-enhanced catalase-mimicking activities by ligand-to-metal charge transfer.

ABSTRACT: Nanozymes are promising synthetic alternatives to natural enzymes owing to their unique physical and chemical properties, but improving their thermocatalytic activity often involves complex procedures. This study introduces a light-induced approach to enhance the catalytic activity of facilely prepared porous cerium oxide ( P-CeO2 ) nanozymes. Under visible light irradiation, the catalytic efficiency (kcat/Km) of the P-CeO2 more than doubles compared to its thermocatalytic efficiency. Spectroscopic analyses reveal that this enhancement stems from a ligand-to-metal charge transfer (LMCT) band, arising from peroxide species adsorbed on the P-CeO2 surface. As a practical demonstration, P-CeO2 exhibits visible-light enhanced scavenging of reactive oxygen species (ROS) in vitro. Overall,

SUBMITTER: Li P 

PROVIDER: S-EPMC11978324 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature