Hydrothermal synthesis and near In situ analysis of NiFe2O4 nanoparticles

Almeida, T. P. , Fay, M., Zhu, Y. and Brown, P. D. (2012) Hydrothermal synthesis and near In situ analysis of NiFe2O4 nanoparticles. Journal of Nanoscience and Nanotechnology, 12(11), pp. 8797-8800. (doi:10.1166/jnn.2012.6467) (PMID:23421289)

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Abstract

The hydrothermal synthesis (HS) of NiFe2O4 nanoparticles (NPs) has been investigated using a novel valve-assisted pressure autoclave. This approach has facilitated the rapid quenching of hydrothermal suspensions into liquid nitrogen, providing ‘snapshots’ representative of the near In Situ physical state of the synthesis reaction products as a function of known temperature. The acquired samples were examined using complementary characterisation techniques of transmission electron microscopy and X-ray diffractometry (XRD). The HS of NiFe2O4 NPs (<25 nm) at pH ∼ 8 proceeded through the formation and dissolution of intermediate amorphous Fe(OH)3 and FeNi3Cl2(OH)8·H2O sheets with increasing reaction temperature. The near In Situ nature of the HS suspension resulted in the formation of NaCl by-product during drying in advance of XRD investigation, not during the HS process.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Almeida, Dr Trevor
Authors: Almeida, T. P., Fay, M., Zhu, Y., and Brown, P. D.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Journal of Nanoscience and Nanotechnology
Publisher:American Scientific Publishers
ISSN:1533-4880
ISSN (Online):1533-4899

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