One-Pot hydrothermal synthesis and characterization of FeS2(Pyrite)/graphene nanocomposite

Golsheikh, A.M. and Huang, N.M. and Lim, H.N. and Chia, C.H. and Harrison, I. and Muhamad, M.R. (2012) One-Pot hydrothermal synthesis and characterization of FeS2(Pyrite)/graphene nanocomposite. Chemical Engineering Journal, 218. ISSN 1385-8947

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Abstract

This work reports on the investigation of temperature, reaction time, pH, concentration of graphene oxide (GO) and the effect of gelatin on the synthesis of pyrite structured FeS2 nanoparticles assembled on graphene nanosheets using a facile one-pot hydrothermal method. The results of X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy and electron microscopy confirmed the simultaneous formation of pyrite structured FeS2 and the reduction of GO, yielding a nanocomposite of the materials, through the hydrothermal process. The systematic investigation shows that the nanocomposite, comprising a uniform distribution of nanoparticles on the surface of the graphene sheets, is easily synthesized, providing that certain reaction criteria are achieved. The condition warrants that the reaction is carried out in the presence of gelatin with a concentration of 1.5 wt./v in a pH of 11 at 200 °C for 24 h. Photocurrent response of the samples showed that the nanocomposite with the GO concentration of 1 mg/mL produced the highest photocurrent value of about 1.01 μA, which is about 2.6 times higher than that obtained by the pure FeS2.

Item Type: Article
Additional Information: Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Gelatin; Graphene; Hydrothermal; Nanocomposite; Pyrite
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: miss munirah saadom
Date Deposited: 21 Feb 2013 00:07
Last Modified: 23 Sep 2013 01:49
URI: http://eprints.um.edu.my/id/eprint/6319

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