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Synthesis of nitrogen-doped ZnO particles by decomposition of zinc nitrate hexahydrate in molten ammonium salts

Published online by Cambridge University Press:  31 January 2011

Naofumi Uekawa ,
Takashi Kojima  and
Kazuyuki Kakegawa
Naofumi Uekawa*
Affiliation:
Graduate School of Engineering, Department of Applied Chemistry and Biotechnology, Chiba University, Chiba-shi 263-8522, Japan
Takashi Kojima
Affiliation:
Graduate School of Engineering, Department of Applied Chemistry and Biotechnology, Chiba University, Chiba-shi 263-8522, Japan
Kazuyuki Kakegawa
Affiliation:
Graduate School of Engineering, Department of Applied Chemistry and Biotechnology, Chiba University, Chiba-shi 263-8522, Japan
*
a) Address all correspondence to this author. e-mail: uekawa@faculty.chiba-u.jp
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Abstract

The N-doped ZnO was prepared by heating a mixture of zinc nitrate hexahydrate [Zn(NO3)2·6 H2O] and ammonium salt at 623 K for 1 h in air. The mixture of zinc nitrate hydrate and ammonium salt formed a homogeneous molten salt at 623 K, and the homogeneous dispersion of the metal ions and ammonium ions contributed to the N-doping. In particular, when the mixture of zinc nitrate hydrate and ammonium acetate (CH3COONH4) was heated at 623 K, the doped amount of nitrogen was higher than with the mixture of zinc nitrate hydrate and NH4NO4. The acetate anion (CH3COO−) restricted the oxidation reaction of nitrate anion (NO3−). Furthermore, Al- and N-co-doped ZnO particles were obtained by heating the mixture of zinc nitrate hydrate, aluminum nitrate hydrate, and ammonium acetate. The Al and N co-doping effectively increased the doped amount of nitrogen. The spontaneous formation of ZnO lattice and the nitrogen source in the molten salt and the homogeneous dispersion of Zn2+ ions and Al3+ ions contributed to the increase in the amount of doped nitrogen.

Keywords

DopantNPowder

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Type
Articles
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Journal of Materials Research , Volume 24 , Issue 11 , November 2009 , pp. 3343 - 3349
Copyright
Copyright © Materials Research Society 2009

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