期刊
CURRENT APPLIED PHYSICS
卷 11, 期 1, 页码 101-108出版社
ELSEVIER
DOI: 10.1016/j.cap.2010.06.027
关键词
Ferrite; Nanoparticles; Synthesis; X-ray diffraction; Magnetic properties; Electron microscopy
资金
- The National Nanotechnology Center (NANOTEC)
- NSTDA
- Ministry of Science and Technology, Thailand
This study reports the simple synthesis of MFe2O4 (where M = Cu, Ni, and Zn) nanoparticles by a modified sol-gel method using high purity metal nitrates and aloe vera plant extracted solution. Using of aloe vera extract simplifies the process and provides an alternative process for a simple and economical synthesis of nanocrystalline ferrites. The obtained precursors were characterized by TG/DTA to determine the thermal decomposition and subsequently were cc at different temperatures in the range of 600-900 degrees C for 2 h to obtain the ferrite nanoparticles. The calcined samples were characterized by XRD, FT-IR, SEM, and TEM. All the prepared samples are polycrystalline and have spinel structure with crystallite sizes of 15-70 nm. The crystallite size increases with increasing the calcination temperature. Magnetic properties of the prepared ferrite samples were measured using Vibrating sample magnetometer (VSM). The room temperature magnetic behavior of as-prepared ferrite powders can be explained as the results of the three important factors: impurity phase of a-Fe2O3, cationic distribution in spinel structure, and the surface spin structure of nanoparticles. (C) 2010 Elsevier B.V. All rights reserved.
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