Transformation of Goethite to Hematite Nanocrystallines by High Energy Ball MillingReport as inadecuate




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Advances in Materials Science and EngineeringVolume 2014 2014, Article ID 589146, 5 pages

Research ArticlePhysics Department, College of Sciences, Al Imam Mohammad Ibn Saud Islamic University IMSIU, P.O. Box 90950, Riyadh 11623, Saudi Arabia

Received 3 June 2014; Accepted 15 July 2014; Published 18 August 2014

Academic Editor: Yong Ding

Copyright © 2014 O. M. Lemine. 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

α-Fe2O3 nanocrystallines were prepared by direct transformation via high energy ball milling treatment for α-FeOOH powder. X-ray diffraction, Rietveld analysis, TEM, and vibrating sample magnetometer VSM are used to characterize the samples obtained after several milling times. Phase identification using Rietveld analysis showed that the goethite is transformed to hematite nanocrystalline after 40 hours of milling. HRTEM confirm that the obtained phase is mostly a single-crystal structure. This result suggested that the mechanochemical reaction is an efficient way to prepare some iron oxides nanocrystallines from raw materials which are abundant in the nature. The mechanism of the formation of hematite is discussed in text.





Author: O. M. Lemine

Source: https://www.hindawi.com/



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