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Journal of Nanotechnology
Volume 2014 (2014), Article ID 474909, 7 pages
http://dx.doi.org/10.1155/2014/474909
Research Article

Synthesis, Characterization, and Magnetic Studies of - Nanoparticles

1Department of Chemistry, Maharishi Markandeshwar University, Mullana, Haryana 133207, India
2Department of Chemistry, College of Engineering Studies, University of Petroleum and Energy Studies, Bidholi, Dehradun 248001, India

Received 27 May 2013; Revised 19 November 2013; Accepted 19 November 2013; Published 29 January 2014

Academic Editor: Paresh Chandra Ray

Copyright © 2014 Avnish Kumar Arora 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

Very fine nanosized metal oxide, namely, iron oxide (α-Fe2O3) has been synthesized by precipitation method using ammonia as precipitating agent and characterized by using XRD (X-ray diffraction), TGA/DTA, surface area measurement, transmission electron microscopy (TEM), and magnetic measurements techniques. XRD studies show that iron oxide was formed as α-Fe2O3 instead of the commonly formed magnetite nanoparticles (Fe3O4) or a mixture of magnetite (Fe3O4) and maghemite (γ-Fe2O3, cubic), and it has rhombohedral structure. Magnetic measurements showed that iron oxide has five unpaired electrons and is ferromagnetic in nature, Ms value being 1.7 emu/g. The particle size of the synthesized iron oxide was determined by TEM. TEM images show that the size of particles of Fe2O3 varied from 15 nm to 49 nm with average crystallite size 35 nm.