Fast and Efficient Preparation of Exfoliated 2H MoS<sub>2</sub> Nanosheets by Sonication-Assisted Lithium Intercalation and
Infrared Laser-Induced 1T to 2H Phase Reversion
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Abstract
Exfoliated 2H molybdenum disulfide
(MoS<sub>2</sub>) has unique properties and potential applications
in a wide range of fields, but corresponding studies have been hampered
by the lack of effective routes to it in bulk quantities. This study
presents a rapid and efficient route to obtain exfoliated 2H MoS<sub>2</sub>, which combines fast sonication-assisted lithium intercalation
and infrared (IR) laser-induced phase reversion. We found that the
complete lithium intercalation of MoS<sub>2</sub> with butyllithium
could be effected within 1.5 h with the aid of sonication. The 2H
to 1T phase transition that occurs during the lithium intercalation
could be also reversed by IR laser irradiation with a DVD optical
drive