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Effect of precipitation temperature and organic additives on size and morphology of ZnO nanoparticles

Published online by Cambridge University Press:  13 March 2012

Özlem Altıntaş Yıldırım  and
Caner Durucan
Özlem Altıntaş Yıldırım
Affiliation:
Department of Metallurgical and Materials Engineering, Middle East Technical University, 06531 Ankara, Turkey
Caner Durucan*
Affiliation:
Department of Metallurgical and Materials Engineering, Middle East Technical University, 06531 Ankara, Turkey
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Low temperature (25 °C–80 °C) synthesis of zinc oxide (ZnO) nanoparticles (<20 nm) at short synthesis periods (∼30 min) was achieved by precipitation. The precipitation system was formed using zinc acetate dihydrate as zinc source, ethylene glycol (EG) as solvent and polyvinyl pyrrolidone (PVP) as chelating agent. The size of spherical ZnO nanoparticles was manipulated by the choice of precipitation temperature (13.0 ± 1.9 nm at 25 °C and 9.0 ± 1.3 nm at 80 °C), which essentially changes the nature of adsorption events between ZnO crystals and organic molecules. The particle size can also be regulated by the amount of chelating agent as a result of further enhancement in adsorption between ZnO crystals and organic additives. The spherical ZnO nanoparticles were agglomerated into triangular form when different solvent was used – by substituting water for EG, which has different adsorption ability. Accordingly, formation and growth mechanisms controlling the size and morphology of ZnO nanoparticles have been proposed.

Keywords

nanostructuremorphologychemical synthesis
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 11 , 14 June 2012 , pp. 1452 - 1461
Copyright
Copyright © Materials Research Society 2012

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