Abstract
The study on luminescent and optical properties of ceria nanoparticles allow one to indirectly assess the defectiveness of the material crystal lattice. The decomposition of the luminescence spectrum in the Gaussian bands shows the presence of Ce3+ ions in the CeO2 crystal lattice, as well as optical active centers, probably associated with oxygen vacancies. These characteristics permit us to estimate the relative amount of Ce3+ ions in the crystal lattice and could be considered as an important prerequisite for the use of nanoparticles as redox agents in industry and medicine.
Highlights
Cerium dioxide nanoparticles are a promising material for use in industry, chemistry, medicine and biology [1,2]
The purpose of this work is to study the optical and luminescent properties of cerium dioxide nanoparticles synthesized by the gas-phase method of electron beam evaporation of ceramic targets
Characteristics of nanoparticles Nanoparticles of cerium dioxide obtained by electron beam evaporation have a grain size of 3-5 nm and a specific surface area of up to 190 m2/g [10]
Summary
Cerium dioxide nanoparticles are a promising material for use in industry, chemistry, medicine and biology [1,2]. Such defects include defects associated with oxygen vacancies (F, F+ and F++ centers), as well as Ce3+ centers, resulting from Ce4+ ions reduction near to oxygen vacancies [4]. These defect centers expressed cause the oxygen nonstoichiometry ceria nanoparticles and, the activity of the material participation in redox reactions. The CeO2 nanoparticles appear antioxidant properties in case of the Ce3 ions presence [5]. The ratio of (Ce3+/Ce4+) is a crucial factor determining activity of CeO2 nanoparticles
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