Open AccessControlling luminescent and redox properties of nanoceria
Author(s) -
Vladyslav Seminko
Publication year - 2022
Publication title -
vìsnik nacìonalʹnoï akademìï nauk ukraïni/vìsnik nacìonalʹnoï akademìï nauk ukraïni
Language(s) - English
Resource type - Journals
eISSN - 2518-1203
pISSN - 1027-3239
DOI - 10.15407/visn2022.02.057
Subject(s) - cerium oxide , nanocrystal , nanoparticle , antioxidant , irradiation , luminescence , redox , cerium , doping , materials science , chemistry , chemical engineering , oxide , nanotechnology , photochemistry , inorganic chemistry , metallurgy , organic chemistry , optoelectronics , physics , nuclear physics , engineering
The unique antioxidant and radioprotective properties of cerium oxide nanocrystals (СеО2–х) in the biological environment has led to considerable attention to these nanocrystals of scientists from various fields. The influence of the defect structure on the mechanisms of antioxidant activity of nanocrystals is revealed, and possible ways to control both the defect structure and antioxidant properties of nanoparticles are shown. The luminescence properties and antioxidant activity of nanoceria and ceria-based mixed (CeO2—Re2O3 (Re = Y, Eu, Tb), CeO2—ZrO2) colloidal nanoparticles depends strongly on the type and concentration of doped ions and laser irradiation. The continuous UV irradiation with specific wavelengths leads to formation of additional Ce3+—Vo—Ce3+ complexes providing better antioxidant activity of pre-irradiated ceria nanoparticles.