TITLE:
Organometallic Titanium Oxides Obtained by Low-Pressure Plasmas of Water on Titanium Tetrapropoxide
AUTHORS:
F. González-Salgado, G. J. Cruz, M. G. Olayo, G. García-Rosales, L. M. Gómez
KEYWORDS:
Particles; Titanium Oxide; Plasma; Synthesis; Titanium Tetrapropoxide
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.2 No.4,
December
28,
2012
ABSTRACT:
This work describes the
synthesis of organometallic titanium oxides using low-pressure plasmas of water
on titanium tetrapropoxide (TTP) in solid phase with glow discharges in the 0.3 - 0.9
mbar, 100 - 150 W and 60 - 240 min intervals. The accelerated particles in
the plasma promoted chemical reactions which produced the partial separation of
organic and inorganic parts of TTP with the consequent formation of TiO in
organometallic films and particles with photosensitivity. These compounds could
hardly be obtained by conventional chemical synthesis. The size of particles
was calculated in the 50 - 414 nm interval. The elemental analysis of the
titanium oxides indicates that the C/Ti and O/Ti atomic ratios are in the 0.63 - 0.54 and
1.89 - 1.96 intervals respectively, depending on the conditions of
synthesis, which suggests that the organic residues are approximately half of
the inorganic content. This proportion affects the X-ray diffraction of the
organometallic compounds making them essentially amorphous; however, they may
have overlapped arrangements resembling some faces of anatase, at 25.3o and
32.5o, and rutile, at 43o, phases. The electrical conductivity of TiO between
20℃ and 100℃ was from 10–10 to 10–12 S/m with
activation energy in the 0 - 2.12 eV interval with 3 tendencies associated
with temperature.