CHEM01200604004 Shri Sanyasinaidu Boddu - Homi Bhabha ...

3.8 Interaction of Eu 3+ ions with Sb 2 O 3 nanorods: Figure 46 shows the XRD patterns of
Sb 2 O 3 nanorods prepared both the XRD patterns of Sb 2 O 3 nanorods prepared in both the
presence and absence of Eu 3+ ions. Sharp peaks in the XRD patterns indicate crystalline
nature of the samples. The peak positions in the XRD patterns confirm that the Sb 2 O 3
samples crystallize in the orthorhombic structure. From the line width of diffraction peaks,
average crystallite sizes was calculated using Debye-Scherer formula and found to be around
40 nm, for the nanorods. Lattice parameters were calculated based on the least square fitting
of the diffraction peaks. The values are a = 4.916(1) Å, b = 12.471(2) Å, c = 5.418(2) Å.
Corresponding values for Sb 2 O 3 nanorods prepared in the presence of Eu 3+ are a = 4.918(3)
Å, b = 12.453(2) Å, c = 5.427(2) Å. The values are comparable within error limits for both
type of samples (i. e., prepared in presence and absence of Eu 3+ ions). The Eu 3+ ions do not
have any effect on the crystallinity and orientation of the nanorods as revealed by the
identical line width and intensity corresponding to the diffraction peaks for Sb 2 O 3 nanorods
prepared in both the presence and absence of Eu 3+ ions.
Intensity (arb.units)
(110)
(111)
(121)
(131)
(200)
(211)
(221)
(240)
(161)
(251)
(310)
(a)
(b)
(321)
20 30 40 50 60
2θ/ o
Fig.46. XRD patterns of Sb 2 O 3 nanorods prepared in presence of (a) 0 at % Eu 3+ and (b) 5 at
% Eu 3+ .
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