Volume 51 (2007)

LUMINESCENT PROPERTIES OF TiO₂: Gd³⁺, Y³⁺ OBTAIN THROUGH SOL-GEL AND HYDROTHERMAL METHODS
Pages 1-4
M. Vasile, N. M. Avram, C. Lăzău, P. Vlăzan

Abstract
The aim of this paper is to present the results of the synthesized TiO₂: Gd³⁺, Y³⁺ nanoparticles by sol-gel and hydrothermal process. Phase-pure anatase TiO₂ nanocrystallites were synthesized directly from a TiCl₄ aqueous solution using C₂H₂O₄ as an additive [1, 2]. A sol-gel was formed when a mixture of TiCl₄ and C₂H₂O₄ was heated on a water bath. Ultrafine powders of TiO₂ were formed in the anatase phase, when the gel was decomposed at room temperature [3]. These powders were analyzed by X-ray diffraction (XRD) and characterized by scanning electron microscopy (SEM). Photoluminescence (PL) and photoluminescence excitation (PLE) measurements were obtained with a conventional lamp as an excitation source [4]. The obtained results are discussed.