CHEM01200604004 Shri Sanyasinaidu Boddu - Homi Bhabha ...

3.6 Structural and luminescence studies on antimony oxide nanomaterials: Antimony
oxide nanomaterials were prepared by hydrolysis of antimony trichloride by aqueous
ammonia solution in iso-propanol, at room temperature. As prepared samples were heated at
100, 200 and 400°C for 5 hours. The XRD patterns of these samples (room temperature,
heated at 100, 200 and 400°C) corresponds to orthorhombic form of Sb 2 O 3 (Fig.42).
However, the sample heated at 400°C showed an additional Sb 2 O 4 phase (2θ=29.03°) [156].
Sharp diffraction peaks indicate crystalline nature of Sb 2 O 3 samples. The average particle
size was calculated by using Debye–Scherrer formula and found to be around 40 nm. Lattice
parameters were calculated for the as prepared sample and found to be a = 4.916(1) Å, b =
12.471(2) Å and c = 5.418(2) Å. Corresponding values for bulk Sb 2 O 3 are a = 4.918(3) Å, b =
12.453(2) Å and c = 5.427(2) Å.
(1 1 0)
(1 2 1)
(1 1 1)
(2 0 0)
(2 1 1)
(2 4 0)
(1 6 1)
(3 1 0)
(3 2 1)
(a)
Intensity (arb.units)
Sb 2
O 4
(b)
(c)
(d)
(e)
20 30 40 50 60
2θ/°
Fig.42. XRD pattern of (a) Sb 2 O 3 sample prepared at room temperature in isopropanol
medium. Corresponding patterns from the samples heated at 100, 200 and 400°C
along with that of bulk Sb 2 O 3 are shown in (b)–(e), respectively.
For bulk Sb 2 O 3 sample the highest intensity peak corresponds to (121) plane around a
2θ value of 28.42° (Fig.42 (e)). However, for samples prepared in isopropanol the highest
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