Preparation and Characterization of Nano-Sized (Mg_(x)Fe_(1–x)O/SiO₂) (x = 0.1) Core-Shell Nanoparticles by Chemical Precipitation Method

Mohsen Ahmadipour, Mozhgan Hatami, Kalagadda Venkateswara Rao

Center Nano science and Technology, Institute of Science and Technology, Jawaharlal Nehru Technological University Hyderabad, Hyderabad, India.

DOI: 10.4236/anp.2012.13006                

Abstract

Magnetic core-shell nanoparticles have been widely studied because of their excellent and convenient magnetic and electrical properties.In this present work core-shell magneticnanoparticles (MNPs) were synthesized by simple chemical precipitation method. Firstly Mg_(x)Fe_(1–x)O (magnesiwuestite) nano powder samples were synthesised by low temperature chemical combustion method. Secondly the as synthesised Mg_(x)Fe_(1–x)O nanoparticles are used to synthesis magnetic core-shell Nano particles byusing 2-propanol, poly ethylene glycol (PEG), ammonia solution 30 wt%, tetraethyl orthosilicate (TEOS). Separation of the core-shell magnetic nanoparticles from the aqueous suspension using a centrifuge. The synthesised MNPs and core shell MNP were characterized by X-ray diffraction (XRD), Thermal gravimetric-differential thermal analyzer (TG-DTA), Transmission electron microscopy (TEM), scanning electron microscopy (SEM), (EDAX) for structural, thermal and morphological respectively. It is observed that the particle size of spherical sampleis 32.5 nm.

Keywords

Magnetic Nanoparticle; Core-Shell; TG-DTA; SEM; TEM

Conflicts of Interest

The authors declare no conflicts of interest.

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