Mitchell, E. and Souza, F. De and Gupta, R. K. and Kahol, P. K. and Kumar, D. and Dong, L. and Gupta, Bipin Kumar (2015) Probing on the hydrothermally synthesized iron oxide nanoparticles for ultra-capacitor applications. Powder Technology, 272. pp. 295-299. ISSN 0032-5910

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Abstract

Herein, we report a facile synthesis of iron oxide nanopatticles by a hydrothermal route. The X-ray diffraction analysis confirms that these nanoparticles are of pure magnetite (Fe3O4) phase. Further, the morphology and average particle size were investigated using scanning electron microscopy. The average particle size of these nanoparticles was observed to be similar to 65 nm. The magnetic measurement reveals the ferromagnetic nature of the synthesized Fe3O4 nanoparticles at room temperature. The coercivity and remanence magnetization were observed to be 98 Oe and 0.51 mu(B)/molecule, respectively. Fe3O4 nanoparticles showed a sharp transition (Verwey transition) around 120 K in M vs. T measurements. The observation of the Verwey transition indicates the high quality and phase purity of the synthesized Fe3O4. Moreover, the Fe3O4 nanoparticles were electrochemically characterized for their potential application as an electrode for ultra-capacitors. The specific capacitance of 97 F/g at the current of 1 mA was observed with excellent cyclic stability. The present facile synthesis method could be a potential approach for fabrication of ultra-capacitors using cheap and environment friendly ferromagnetic iron oxide nanoparticles for high performance energy materials.

Item Type:	Article
Uncontrolled Keywords:	Iron oxide Hydrothermal synthesis Scanning electron microscopy Magnetic properties Cyclic voltammetry Ultracapacitor
Subjects:	Chemistry > Chemical Sciences
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	06 Oct 2016 06:38
Last Modified:	06 Oct 2016 06:38
URI:	http://npl.csircentral.net/id/eprint/1957

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