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Issue 38, 2013
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The enhanced photocatalytic and bactericidal activities of carbon microsphere-assisted solvothermally synthesized cocoon-shaped Sn4+-doped ZnO nanoparticles

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Abstract

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.

Graphical abstract: The enhanced photocatalytic and bactericidal activities of carbon microsphere-assisted solvothermally synthesized cocoon-shaped Sn4+-doped ZnO nanoparticles

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Publication details

The article was received on 22 Apr 2013, accepted on 01 Jul 2013 and first published on 01 Jul 2013


Article type: Paper
DOI: 10.1039/C3DT51058A
Citation: Dalton Trans., 2013,42, 13855-13865
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    The enhanced photocatalytic and bactericidal activities of carbon microsphere-assisted solvothermally synthesized cocoon-shaped Sn4+-doped ZnO nanoparticles

    C. Karunakaran, S. SakthiRaadha, P. Gomathisankar and P. Vinayagamoorthy, Dalton Trans., 2013, 42, 13855
    DOI: 10.1039/C3DT51058A

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