Studies on the use of nano zinc oxide and modified silica in NR, CR ...

Preparation and characterization of zinc oxide
From the bulk density results, it is seen that ZnO prepared in the
laboratory has high values when compared with those of the conventional
ZnO. This may be due to reduction in particle size and difference in structure.
It is observed that particle size is lower for ZnO(p) and ZnO(s) than that of
ZnO(c).
3.4.2 Purity of zinc oxide
Purity of ZnO are shown in Table 3.2.
Table 3.2: Purity of zinc oxide
Sample Purity of ZnO (%)
ZnO(p) 99.8
ZnO(s) 99.9
ZnO(c ) 99.8
The purity of nano zinc oxide prepared from precipitation and solid
state pyrolytic method is not less than 99.0 percent. This indicates the high
purity of prepared nano zinc oxide and conventional zinc oxide.
3.4.3. Energy dispersive X-ray spectrometry
The chemical stoichiometry of ZnO nanoparticle was investigated
with EDX (Figure 3.1 a, b), which affirmed an atomic ratio of Zn: O ≅ 1:1.
Element Element % Atomic %
O 19.66 24.21
Zn 80.34 75.79
Total 100.00 100.00
Figure 3.1 a: .EDX patterns of ZnO(p) nanoparticles
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