Effect of FeCl2 concentration on the properties of magnetic nanoparticles by using Massart's procedure

Ang, Beechin and Yaacob, Iskandar Idris and Chew, C. S. (2014) Effect of FeCl2 concentration on the properties of magnetic nanoparticles by using Massart's procedure. Sains Malaysiana, 43 (4). pp. 611-616. ISSN 0126-6039

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Abstract

The effect of variation of FeCl2 concentration on the properties of magnetic nanoparticles produced by Massart's procedure was investigated. Samples with different FeCl2 concentration of 0.1, 0.8, 1.0, 1.2 and 1.5 M were produced. In this technique, an aqueous mixture of ferrous and ferric chloride was co-precipitated under controlled conditions to yield magnetic iron oxide nanoparticles. Thermogravimatric analysis (up to 700°C) showed a continuous weight loss from room temperature to 200°C that was mainly due to evaporation of water from the sample. Above 230°C, no more weight loss was observed indicating the stability of the maghemite nanoparticles. The lattice parameter of the samples obtained from X-ray diffraction analysis showed that the nanoparticles formed were maghemite (γ-Fe2O3). The crystallite sizes calculated from the broadening of XRD peaks were 6.79, 6.56, 6.15, 6.72 and 7.24 nm for FeCl2 concentration of 0.1, 0.8, 1.0, 1.2 and 1.5 M, respectively. The magnetization curves showed no hysteresis indicating that the particles were superparamagnetic. The least upper bound of the 'magnetic' sizes calculated were 7.53, 6.29, 5.92, 6.41 and 8.04 nm and the physical sizes measured from TEM images were 5.97, 6.02, 4.98, 5.35 and 5.98 nm, respectively. The crystallite, magnetic and physical sizes were similar, indicating that the particles are mon°Crystals.

Item Type:	Article (Journal)
Additional Information:	6524/58389
Uncontrolled Keywords:	Maghemite; magnetic nanoparticles; Massart’s procedure
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Prof. Dr. Iskandar Idris Yaacob
Date Deposited:	18 Sep 2017 14:41
Last Modified:	18 Sep 2017 14:41
URI:	http://irep.iium.edu.my/id/eprint/58389

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