Structure and photoluminescent properties of TiO2:Eu3+ nanoparticles synthesized under hydro and solvothermal conditions from different precursors

Abstract

Crystalline phosphors of Eu 3+-doped titania (TiO 2 :Eu 3+) were prepared by hydro and solvothermal synthesis with luminescent ion concentration of 2 mol.%. The structure and shape of the synthesized nanoparticles were characterized using X-ray powder diffraction, transmission electron microscopy, and Raman spectroscopy. Changes in the emission, excitation spectra, and the intensity decay of the photoluminescence for TiO 2 :Eu 3+ nanoparticles were analyzed their phase composition. The photoluminescence of synthesized TiO 2 :Eu 3+ crystalline phosphors depends on whether the said nanophosphors are formed from organometallic or inorganic precursors under hydro-and solvothermal conditions. Indeed, photoluminescence excitation at wavelengths ranging from 350-550 nm leads to splitting of electron dipole transitions into Stark components according to the symmetry of the Eu 3+ surroundings. Also, both nanoparticles with the anatase structure and phosphors predominantly containing rutile showed very short photoluminescence lifetimes.

Synergistic Effect of Metal Oxide and Carbon Nanoparticles on the Thermal and Mechanical Properties of Polyimide Composite Films

“…Solvothermal treatment under the same conditions was performed on a mixture of titanium butoxide with toluene in autoclaves. TiO 2 nanoparticles with the anatase structure were formed [ 64 ], and annealed at 500 °C for 2 h.…”

Metal Oxide Nanoparticles: An Effective Tool to Modify the Functional Properties of Thermally Stable Polyimide Films

“…Titanium butoxide was added dropwise to toluene and stirred continuously for 24 h, the reaction mixture was then transferred to a steel autoclave with a Teflon cell with 80% filling factor. The parameters of isothermal treatment were chosen in accordance with the method presented in [29], the TiO 2 nanoparticles obtained being of size 14 nm.…”

Synthesis of core-shell titanium dioxide nanoparticles with water-soluble shell of poly(methacrylic acid)

“…In the recent years, nanosized titania and titania-based nanocomposites have become increasingly popular materials in the industrial-scale manufacturing of many products, agriculture, environmental science, and power engineering due to their photocatalytic [1][2][3][4][5][6], photoluminescent [7,8], semiconductor [9][10][11], pigment [12], and biological [13][14][15] properties. In particular, titanium dioxide nanoparticles are widely used in agriculture for the photocatalytic decomposition of pesticides [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31], solar energy-assisted photocatalytic water purification (review [16] and references therein), plant disease control [32][33][34].…”