Journal
DALTON TRANSACTIONS
Volume 42, Issue 38, Pages 13855-13865Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3dt51058a
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Funding
- Science and Engineering Research Board (SERB), Department of Science and Technology (DST), New Delhi [SR/S1/PC-41/2011]
- Council of Scientific and Industrial Research (CSIR), New Delhi [21(0887)/12/EMR-II]
- DST
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Cocoon-shaped Sn4+-doped ZnO nanoparticles have been synthesized by a solvothermal method using carbon microspheres as a template. The optimum doping level for photocatalysis is 3% (g. atom). Powder X-ray diffractograms show that the ZnO has a primitive hexagonal crystal structure and that doping ZnO with Sn4+ increases the unit cell lengths and the Zn-O bond lengths. Larger crystal growth along the c-axis is also observed. The measured size of the cocoon-shaped Sn4+-doped ZnO nanoparticles is larger than the mean crystallite size. Solid state impedance spectroscopy studies reveal that Sn4+-doping increases the charge transfer resistance. Doping does not significantly modify the optical band gap, but does suppress green emission. A decrease in the number of crystal defects due to oxygen vacancies is likely to be a reason for the enhanced photocatalytic properties of the cocoon-shaped Sn4+-doped ZnO nanoparticles. Doping ZnO with Sn4+ enhances the bactericidal activity as well.
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