Effect of solvents on the structure and magnetic properties of pyrolysis derived carbon globules embedded with iron/iron carbide nanoparticles and their applications in magnetorheological fluids

Kumar, R and Anupama, AV and Kumaran, V and Sahoo, B (2018) Effect of solvents on the structure and magnetic properties of pyrolysis derived carbon globules embedded with iron/iron carbide nanoparticles and their applications in magnetorheological fluids. In: Nano-Structures and Nano-Objects, 16 . pp. 167-173.

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Abstract

Carbon globules embedded with magnetic iron/iron carbide nanoparticles were synthesized by pyrolysis route using different organic solvents (benzene/toluene/xylene) along with ferrocene as iron catalyst precursor. All other synthesis parameters were kept constant (e.g. reaction temperature ≈ 950 ºC, heating rate of 3 ºC/min). We observed a variation of magnetic phase composition with the type of solvent (carbon source) used for synthesis, although the morphology of all the samples was similar. Improved sample crystallinity, distribution of particles and saturation magnetization were obtained, when toluene was used as solvent. Interestingly, rod shaped magnetic particles were observed in case of benzene, whereas for toluene and xylene, all iron-based magnetic particles were spherical. Due to higher saturation magnetization, we have used the particles prepared using toluene as a solvent to demonstrate the magnetorheological behaviour of these carbon-coated magnetic nanoparticles. We observed good magneto-response for the samples suggesting that these particles are potential candidate for magnetorheological applications.

Item Type:	Journal Article
Publication:	Nano-Structures and Nano-Objects
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to the Elsevier B.V.
Keywords:	Carbon encapsulated iron-based nanoparticles; Iron/iron carbide; Magnetorheology; Pyrolysis
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	05 Aug 2022 09:26
Last Modified:	05 Aug 2022 09:26
URI:	https://eprints.iisc.ac.in/id/eprint/75361

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