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Issue 26, 2016
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Molybdenum disulfide nanoflakes through Li-AHA assisted exfoliation in an aqueous medium

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Abstract

Two dimensional materials are promising candidates for sensing, catalysis, and energy storage applications because of their high surface area and excellent electronic properties. Layered materials such as graphite, transition metal dichalcogenides (TMDs) and transition metal oxides (TMOs) can be a major source of two dimensional systems. However, the development of two dimensional systems from layered materials has been hindered by the lack of a proper exfoliation technique. We report the exfoliation of bulk MoS2 powder into few layered nanoflakes using lithium salt of 6-aminohexanoic acid (Li-AHA) in an aqueous dispersion. Li-AHA treated MoS2 was ‘destacked’ to form few layered nanoflakes due to the electrostatic repulsion. XRD analysis showed that the Li-AHA treatment resulted in the formation of highly crystalline MoS2 nanoflakes. Raman spectroscopic analysis indicated a shift in E12g and A1g peaks suggesting the reduction in interlayer interactions, which in turn indicates exfoliation. Electron microscopic observations strongly suggested the formation of a few layered structure. These nanoflakes can be further incorporated into various polymer matrices to prepare composites with superior mechanical and electrical properties as compared to its bulk counterpart. The reported exfoliation technique is simple, effective and can be extended to exfoliate various transition metal dichalcogenides.

Graphical abstract: Molybdenum disulfide nanoflakes through Li-AHA assisted exfoliation in an aqueous medium

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Article information


Submitted
29 Nov 2015
Accepted
15 Feb 2016
First published
17 Feb 2016

RSC Adv., 2016,6, 22026-22033
Article type
Paper
Author version available

Molybdenum disulfide nanoflakes through Li-AHA assisted exfoliation in an aqueous medium

B. Bindhu, B. K. Sharu, M. S. Gopika, P. K. Praseetha and K. Veluraja, RSC Adv., 2016, 6, 22026
DOI: 10.1039/C5RA25368C

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