TITLE:
Preparation and Characterization of Nano-Sized (Mg(x)Fe(1–x)O/SiO2) (x = 0.1) Core-Shell Nanoparticles by Chemical Precipitation Method
AUTHORS:
Mohsen Ahmadipour, Mozhgan Hatami, Kalagadda Venkateswara Rao
KEYWORDS:
Magnetic Nanoparticle; Core-Shell; TG-DTA; SEM; TEM
JOURNAL NAME:
Advances in Nanoparticles,
Vol.1 No.3,
November
30,
2012
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.