Synthesis and characterization of iron oxide nanoparticles prepared hydrothermally at different reaction temperatures and pH

Palagiri Bhavani; Chintaparty Rajababu; Md. Arif; Immareddy Venkata Subba Reddy; Nagireddy Ramamanohar Reddy

doi:10.3139/146.111417

Published by De Gruyter September 29, 2016

Synthesis and characterization of iron oxide nanoparticles prepared hydrothermally at different reaction temperatures and pH

Palagiri Bhavani , Chintaparty Rajababu , Md. Arif , Immareddy Venkata Subba Reddy and Nagireddy Ramamanohar Reddy

From the journal International Journal of Materials Research

https://doi.org/10.3139/146.111417

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Abstract

Iron oxide nanoparticles were synthesized with Fe⁺² and Fe⁺³ precursors in a 1 : 2 ratio by using the hydrothermal method under different reaction temperatures and alkaline conditions. The iron oxide nanoparticles were characterized for structure, morphology, optical and magnetic properties. X-ray diffraction analysis confirmed that the samples prepared at different hydrothermal temperatures exhibited a magnetite structure, the increased intensity of the peaks indicates a high degree of crystallinity. The transformation of goethite to Fe₃O₄ structure was observed with variation of the pH value. The morphological study revealed that some samples exhibited spherical particles and some others exhibited a mixed morphology of spheres and rods. The iron oxide synthesized at 190 °C exhibited better magnetic properties due to the uniform distribution of spheres with particles size in the range, 18 – 25 nm.

Keywords: Hydrothermal temperature; Alkaline concentration; Magnetite nanoparticles; Saturation magnetization

*Correspondence address, Nagireddy Ramamanohar Reddy, Department of Materials Science and Nanotechnology, Yogi Vemana University, Vemanapuram, Kadapa-516003, India, Tel.: +91-8562-225451, Fax: +91-8562-225419, E-mail: manoharphd@gmail.com

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Received: 2016-03-02

Accepted: 2016-05-11

Published Online: 2016-09-29

Published in Print: 2016-10-14

Synthesis and characterization of iron oxide nanoparticles prepared hydrothermally at different reaction temperatures and pH

Abstract

References

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