CHEM01200604004 Shri Sanyasinaidu Boddu - Homi Bhabha ...

615 nm
Fig.50:
FT-IR patterns (a) and Raman Spectra (b) of Sb 2 O 3 nanorods prepared in
presence of different Eu 3+ concentrations
Fig.51:
FT-IR patterns for the region corresponding to the OH stretching vibrations from
(a) Sb 2 O 3 nanorods (b) Sb 2 O 3 nanorods with 10 at % Eu 3+ .
Fig.52: XRD patterns for the product obtained by the reaction between Sb 3+ and Eu 3+
ions taken in stoichiometric amounts and heated at different temperatures: (a) as
prepared (b) 500°C and (c) 900°C.
Fig.53:
Emission spectra (a) and decay curves corresponding to the 5 D 0 level of Eu 3+ (b)
for the product obtained by the reaction between Sb 3+ and Eu 3+ ions taken in the
stoichiometric ratio. Samples were excited at 395 nm and emission monitored at
612nm.
Fig.54:
XRD patterns for (a) hexagonal GaPO 4 standard corresponding to JCPDS file
no. 080497 (b) GaPO 4 nanoparticles, (c and d) GaPO 4 nanoparticles with 2.5 and
5 at % Eu 3+ , respectively.
Fig.55:
TEM images of (a) GaPO 4 nanoparticles. The selected area electron diffraction
pattern from nanoparticles is shown in Fig.55 (b).
Fig.56: Emission spectrum from GaPO 4 nanoparticles containing (a) 2.5 at % and (b) 5
at % Eu 3+ ions. The corresponding pattern from EuPO 4 nanoparticles is shown in
Fig.56 (c). All samples were excited at 260 nm.
Fig.57:
Emission spectrum of europium hydroxide sample prepared in glycerol medium
by the identical method as that employed for GaPO 4 and EuPO 4 nanoparticles,
except that urea rather than ammonium dihydrogen phosphate was used to create
the alkaline environment and to prevent the formation of EuPO 4 phase.
Fig. 58:
31 P MAS NMR patterns of GaPO 4 nanoparticles containing (a) 0 at % (b) 2.5 at
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