The influence of chemical prehistory on the structure, photoluminescent properties, surface and biological characteristics of Zr0.98Eu0.02O1.99 nanophosphors

Abstract

ZrO 2 nanoparticles doped with 2 mol.% of EuO 1.5 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 Zr 0.98 Eu 0.02 O 1.99 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.

Influence of Stabilizing Ion Content on the Structure, Photoluminescence and Biological Properties of Zr1–xEuxO2–0.5x Nanoparticles

“…With an increase in the content of europium ions in the ZrO 2 crystal structure, the phase composition of nanoparticles, the possible concentration quenching, and the P.L. efficiency depend strongly on the synthesis method and the nature of the precursors [30][31][32][33][34][35][36][37][38].…”

Structure of nanoparticles in the ZrO2-Y2O3 system, as obtained under hydrothermal conditions

“…Due to the presence of several polymorphic modifications [1][2][3][4] zirconium dioxide is of interest as a model for studying the effect of the synthesis methods and parameters on the formation of nanocrystals with different structure [5][6][7][8][9][10][11][12][13][14][15]. Zirconium dioxide based nanomaterials with various structures, morphologies, and particle size parameters have a wide range of applications [16][17][18][19][20][21][22][23][24][25][26][27], which makes the above studies relevant from a practical point of view as well.…”

Zirconia Reduced Graphene Oxide Nano-Hybrid Structure Fabricated by the Hydrothermal Reaction Method

“…S3/2D intesity ratio is related to the diminution in defects and involves a lower quantity of oxygen in graphene [56]. Raman shifts at 149 cm −1 , 269 cm −1 , 407 cm −1 and 616 cm −1 were interpreted as tetragonal zirconia phases [57,58].…”