835
fig. 5. eDs spectrum of Tio
2
nanopowder
Studies of the surface morphology of titanium oxide
commercially micro powder was performed by using scanning
electron micrographs and shown in Figures 6a and 6b. It can
be observed visible layer composed of the microparticles.
Only at a magnification, more than 250 kx
the diameter of the
microparticles can be analyzed. Using the Image J program was
determined that the diameter of the purchased a commercial
TiO
2
powder particles is in the range from 90 to 400 nm
comparison with the own prepared powder nanoparticles does
not exceed a few nanometers.
a)
b)
fig. 6. seM image of Tio
2
micro powder registered at a magnification:
a) 100 kx, b) 250 kx
To confirm that the tested
micro powder is a titanium
oxide also was made a qualitative study of the chemical
composition by using energy dispersive spectrometer and was
shown as graphs in Figure 7. The spectra were registered the
reflections characteristic for the titanium and
oxygen from the
sample.
fig. 7. eDs spectrum of Tio
2
micropowder
The entire structural studies were complemented by
using X-ray researches (Fig. 8a and 8b). Registered diffraction
pattern of titanium oxide nanopowder (Figure 7a) shows the
reflection characteristic for the indium tin oxide ITO (coming
from the conductive layer located on the glass substrate) and
the reflection characteristic for the titanium oxide -
a variety
of anatase (coming from the sample). Registered reflections
derived from anatase have characteristic wide shape that
indicates fine crystalline structure. On the other hand, the
diffraction pattern registered for the titanium oxide micro
powder (Figure 8b) shows the reflections from the only anatase.
Reflections are sharp and with a slim shape characteristic for
the microcrystalline structure.
a)
b)
Fig. 8. The diffraction pattern produced
titanium oxide nanopowder
(a) and micro powder (b)
Further testing of structural of deposited layers is made by
using an inVia Reflex Raman spectrometer equipped with an Ar
ion laser with a 514,5 nm length. Spectral range is 150 – 3200
cm-1. Raman spectra of samples for nano and micro powder
were registered (Fig. 9a and 9b). Using confocal microscope
images, the data point on the sample was presented. The
results
were processed by using the wire 3.1 program determining
the structure of the deposited layers as anatase, a variant of
titanium oxide that confirms earlier research done by using the
X-ray crystallography.
Prepared by doctor blade layers were tested for
absorbance. Samples were determined as follows:
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