596-603Cerium oxide (ceria)
nanoparticles were synthesized using cerium nitrate and ammonium carbonate as
precursors.
As-synthesized CeO2 powders were calcined between 400-850°C for 2 h. The samples were characterized by thermogravimetric
analysis, X-ray powder diffraction, transmission electron microscopy, Fourier
transform infrared,
UV-Visible, photoluminescence
and Raman spectroscopies. The FTIR spectrum exhibits strong broad band below
600 cm<span style="font-family:Symbol;mso-ascii-font-family:
" times="" new="" roman";mso-hansi-font-family:"times="" roman";mso-char-type:symbol;="" mso-symbol-font-family:symbol"="" lang="EN-GB">-1 which
is due to Ce-O stretching mode
to confirm the formation of pure CeO2. It is shown that average
particle size increases as calcination temperature is increased and the
absorption is red shifted. PL studies observed that emission band is blue
shifted and intensity of emission peaks decreases with increase in calcination
temperature. Raman spectrum is characterized by the presence of a very strong
band near 464 cm<span style="font-family:Symbol;
mso-ascii-font-family:" times="" new="" roman";mso-hansi-font-family:"times="" roman";="" mso-char-type:symbol;mso-symbol-font-family:symbol"="" lang="EN-GB">-1. The desired structural and optical properties of CeO2
nanoparticles make it as a promising material for photocatalytic and
optoelectronic applications.
</span