Open AccessPhoto-acoustic properties of nanoTiO2:Er
Author(s) -
R. Palomino-Merino,
R. LozadaMorales,
J. Martínez-Juárez,
G. Juárez-Díaz,
J. CarmonaRodríguez,
P. Del Ángel,
S. JiménezSandoval,
S.A. Tomás,
O. Zelaya-Ángel,
V. M. Castaño
Publication year - 2016
Publication title -
international journal of basic and applied sciences
Language(s) - English
Resource type - Journals
ISSN - 2227-5053
DOI - 10.14419/ijbas.v5i4.5739
Subject(s) - nanocrystalline material , materials science , anatase , transmission electron microscopy , absorption edge , analytical chemistry (journal) , absorption spectroscopy , absorption (acoustics) , scanning electron microscope , dispersion (optics) , diffraction , band gap , optics , nanotechnology , chemistry , optoelectronics , photocatalysis , composite material , biochemistry , physics , chromatography , catalysis
Nanocrystalline Er-doped TiO2 was prepared by sol-gel at room temperature. X-ray diffraction, photoacoustic spectroscopy (optical absorption), transmission electron microscopy (TEM), and electron dispersion microscopy (EDS) were carried out on both as-prepared and thermally-annealed (air at 700 ºC) samples, revealing the anatase crystalline phase of TiO2. The samples exhibit an average grain size from 38 to 5.1 nm, as the nominal concentration of Er varies from 0 % to 7 %. The photoacoustic spectra evidence the absorption edge at 300 nm attributed to TiO2, as well as several electronic transitions which are atomic energy absorption-line levels characteristics of Er.