Synthesis and characterization of hexagonal shaped nanocrystalline zinc oxide powders

Ahmad, M. and Ahmed, E. and Khalid, N. R. and Jackson, M. J. and Ahmed, W. (2014) Synthesis and characterization of hexagonal shaped nanocrystalline zinc oxide powders. In: Nanotechnology: concepts, methodologies, tools, and applications. IGI Global, pp. 204-217. ISBN 9781466651265, 1466651253, 9781466651258

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Abstract

Nanocrystalline ZnO powders are synthesized using a quick, simple and inexpensive combustion method. Glycine and zinc nitrate, used as fuel and oxidant/cation sources respectively, were mixed together at room temperature to form a slurry or gel. A series of experiments were performed to synthesize nanoparticles for different fuel to oxidant ratios. The rate of heating and stirring greatly influenced the combustion process. The as-synthesized powder was heat treated at elevated temperatures for varying time to remove adsorbed impurities from the surface of the ZnO nanoparticles. Both the as-synthesized and heat treated powders were characterized using a variety of analytical techniques. The hexagonal wurtzite phase of the ZnO powder was revealed from x-ray diffraction measurements. A decrease in the x-ray diffraction density (Dx) and the bulk density (D) resulted in an increase in percentage porosity (P) of as-synthesized and heat treated ZnO powders. The range of fuel to oxidant ratios used in the present work indicates that they had a strong influence on the grain size of ZnO powders. The average grain size estimated by using the Scherer formula indicated an approximate value of 6-21 nm for the as-synthesized and heat treated samples. © 2014, IGI Global.

Keywords:Nanotechnology, Materials
Subjects:F Physical Sciences > F200 Materials Science
J Technologies > J510 Materials Technology
Divisions:College of Science > School of Mathematics and Physics
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ID Code:27127
Deposited On:06 Jul 2017 10:16

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