Aging study of the powdered magnetite nanoparticles

Document Type

Article

Source of Publication

Materials Chemistry and Physics

Publication Date

3-1-2017

Abstract

© 2016 Elsevier B.V. Magnetite nanoparticles were produced via co-precipitation method and then stored at room temperature for 6 years in aerobic atmosphere. Variations in the inherent solid phase and solid interfacial properties of the prepared magnetite nanoparticles were investigated. For this purpose the fresh and aged samples were characterized using transmission electron microscopy, vibrating sample magnetometer, X-ray diffractometer and energy dispersive X-ray spectrometer. The solid phase transformations of magnetite nanoparticles to maghemite nanoparticles as well as formation of other iron oxides were happened. After aging of 6 years, no change was occurred in the magnetic features; however increase in particle size from 9.6 to 18.5 measured by transmission electron microscopy was confirmed. The crystallite size and vibrating sample magnetometer values were measured before and after aging and found to increase from 8.98 nm and 47.23 emu/g to 16.18 nm and 58.36 emu/g respectively. The formation of other iron oxides, recrystallization and agglomeration during aging process, caused a significant decrease in the specific surface area from 124.43 to 45.00 m2/g of the stored sample.

ISSN

0254-0584

Publisher

Elsevier Ltd

Volume

189

First Page

86

Last Page

89

Disciplines

Life Sciences

Keywords

Aging, Maghemite, Magnetite, Nanoparticles

Scopus ID

85010911733

Indexed in Scopus

yes

Open Access

no

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