Table of Contents
Journal of Nanoparticles
Volume 2013 (2013), Article ID 671214, 10 pages
http://dx.doi.org/10.1155/2013/671214
Research Article

Aqueous Medium Synthesis Route for Randomly Stacked Molybdenum Disulfide

Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal 721302, India

Received 23 October 2012; Revised 6 February 2013; Accepted 20 March 2013

Academic Editor: Dongsheng Wen

Copyright © 2013 Pravas Kumar Panigrahi and Amita Pathak. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Synthesis of poorly crystalline, randomly oriented rag-like structures of molybdenum disulfide has been reported starting from aqueous solutions of ammonium molybdate, and thioacetamide in presence of sodium dodecyl sulfate via calcination of the amorphous precipitates, obtained through acidification of the in situ generated intermediate of ammonium tetrathiomolybdate. X-ray photoelectron spectroscopy, UV-visible spectroscopy, and X-ray diffraction of the calcined samples reveal the formation of single-phase MoS2, while the amorphous precipitates have been found to be a mixture of Mo2S5, MoS3, and a trace amount of H2MoS4. Highly folded and disordered layers of rag-like MoS2 have been confirmed through high-resolution transmission electron microscopy. The electrical conductivity for the cold pressed pellet of the MoS2 sample is found to be significantly higher than that of 2H-MoS2 and increases further on annealing.