NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2019, 10 (2), P. 164–175
The influence of chemical prehistory on the structure, photoluminescent properties, surface and biological characteristics of Zr0.98Eu0.02O1.99 nanophosphors
A. N. Bugrov – Institute of Macromolecular Compounds of RAS, Bolshoy pr. 31, 199004 St. Petersburg; St. Petersburg Electrotechnical University “LETI”, ul. Professora Popova 5, 197376 St. Petersburg, Russia; alexander.n.bugrov@gmail.com
R.Yu. Smyslov – Institute of Macromolecular Compounds of RAS, Bolshoy pr. 31, 199004 St. Petersburg; Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia; urs1968@gmail.com
A.Yu. Zavialova – St. Petersburg Electrotechnical University “LETI”, ul. Professora Popova 5, 197376 St. Petersburg; St. Petersburg State Institute of Technology (Technical University), Moskovsky prospect 26, St. Petersburg, 190013, Russia; zavialova.a.y@gmail.com
G. P. Kopitsa – St. Petersburg Nuclear Physics Institute, NRC KI, Orlova roscha mcr. 1, Gatchina, Leningrad region, 188300; Grebenshchikov Institute of Silicate Chemistry RAS, Makarova nab. 2., letter B, 199034 St. Petersburg, Russia; kopitsa_gp@pnpi.nrcki.ru
ZrO2 nanoparticles doped with 2 mol.% of EuO1.5 were obtained from solutions of inorganic salts, zirconium alkoxide and chelating compounds under hydro and solvothermal conditions. The phase compositions of the synthesized nanophosphors were determined using the methods of X-ray diffraction, photoluminescence and Raman spectroscopy. The changes in a particle size, the value of the specific surface area and its charge depending on the conditions of preparation (the type of solvent, isothermal exposure time) and the precursor nature used in the synthesis were considered. It was found that Zr0.98Eu0.02O1.99 nanoparticles with a high content of the monoclinic phase, synthesized from zirconium and europium acetylacetonates, have the highest luminescence efficiency. At the same time, the maximum photoluminescence lifetime and the least cytotoxicity were characteristic of crystal phosphors with a more symmetrical crystal lattice of the host matrix, as well as a high surface area/volume ratio.
Keywords: solvothermal synthesis, zirconia, europium, phase transitions, nanoparticles, photoluminescence, fluorescence lifetime, quantum yield, cytotoxicity.
PACS 78.67. n; 78.67.Bf
DOI 10.17586/2220-8054-2019-10-2-164-175
