to the complete decomposition of MB and MO structure. Meanwhile,
holes migrate to surface hydroxyl group to produce hydroxyl radicals
(•OH), which are also involved in degradation of dye molecules. Thus,
MB and MO were degraded under visible light irradiation.
Also with the increases in Hg percentage more red shift is observed
in the absorption edge as shown in Fig. 8. The experimental results
show that, the hole and electrons make direct or indirect decomposition
of organic dye molecule to reactive intermediates due to the existence
of the intermediate states [35–48].
4. Conclusion
In this paper, Hg doped ZnO nanorods have been successfully prepared
by simple thermal decomposition method. Compared to the
other methods, the preparation by this method is simple, fast and
cost effective. The characterization results show that, rod shaped Hg
doped ZnO exhibits hexagonal structure without changing the morphology
of ZnO and the EDXS result confirms the presence of Hg in
stoichiometric ratio. The UV–Vis spectra results explained the red
shift and that the doped samples exhibit higher photocatalytic activity
under visible light. This property enables us to use Hg doped ZnO in
opto-electronic devices.
to the complete decomposition of MB and MO structure. Meanwhile,holes migrate to surface hydroxyl group to produce hydroxyl radicals(•OH), which are also involved in degradation of dye molecules. Thus,MB and MO were degraded under visible light irradiation.Also with the increases in Hg percentage more red shift is observedin the absorption edge as shown in Fig. 8. The experimental resultsshow that, the hole and electrons make direct or indirect decompositionof organic dye molecule to reactive intermediates due to the existenceof the intermediate states [35–48].4. ConclusionIn this paper, Hg doped ZnO nanorods have been successfully preparedby simple thermal decomposition method. Compared to theother methods, the preparation by this method is simple, fast andcost effective. The characterization results show that, rod shaped Hgdoped ZnO exhibits hexagonal structure without changing the morphologyof ZnO and the EDXS result confirms the presence of Hg instoichiometric ratio. The UV–Vis spectra results explained the redshift and that the doped samples exhibit higher photocatalytic activityunder visible light. This property enables us to use Hg doped ZnO inopto-electronic devices.
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