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Journal of Nanotechnology
Volume 2014 (2014), Article ID 193162, 6 pages
http://dx.doi.org/10.1155/2014/193162
Research Article

Synthesis of Nickel and Nickel Hydroxide Nanopowders by Simplified Chemical Reduction

Department of Chemistry, University of North Texas, 1155 Union Circle No. 305070, Denton, TX 76203, USA

Received 31 July 2013; Revised 3 December 2013; Accepted 4 December 2013; Published 5 February 2014

Academic Editor: Thomas Thundat

Copyright © 2014 Jeerapan Tientong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Nickel nanopowders were synthesized by a chemical reduction of nickel ions with hydrazine hydrate at pH ~12.5. Sonication of the solutions created a temperature of 54–65°C to activate the reduction reaction of nickel nanoparticles. The solution pH affected the composition of the resulting nanoparticles. Nickel hydroxide nanoparticles were formed from an alkaline solution (pH~10) of nickel-hydrazine complexed by dropwise titration. X-ray diffraction of the powder and the analysis of the resulting Williamson-Hall plots revealed that the particle size of the powders ranged from 12 to 14 nm. Addition of polyvinylpyrrolidone into the synthesis decreased the nickel nanoparticle size to approximately 7 nm. Dynamic light scattering and scanning electron microscopy confirmed that the particles were in the nanometer range. The structure of the synthesized nickel and nickel hydroxide nanoparticles was identified by X-ray diffraction and Fourier transform infrared spectroscopy.