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Exfoliation of bulk 2H-MoS2 into bilayer 1T-phase nanosheets via ether-induced superlattices
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Exfoliation of bulk 2H-MoS2 into bilayer 1T-phase nanosheets via ether-induced superlattices
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Exfoliation of bulk 2H-MoS2 into bilayer 1T-phase nanosheets via ether-induced superlattices
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Journal Article
Exfoliation of bulk 2H-MoS2 into bilayer 1T-phase nanosheets via ether-induced superlattices
2024
Overview
The exfoliation of bulk 2H-molybdenum disulfide (2H-MoS
2
) into few-layer nanosheets with 1T-phase and controlled layers represents a daunting challenge towards the device applications of MoS
2
. Conventional ion intercalation assisted exfoliation needs the use of hazardous n-butyllithium and/or elaborate control of the intercalation potential to avoid the decomposition of the MoS
2
. This work reports a facile strategy by intercalating Li ions electrochemically with ether-based electrolyte into the van der Waals (vdW) channels of MoS
2
, which successfully avoids the decomposition of MoS
2
at low potentials. The co-intercalation of Li
+
and the ether solvent into MoS
2
makes a first-order phase transformation, forming a superlattice phase, which preserves the layered structure and hence enables the exfoliation of bulk 2H-MoS
2
into bilayer nanosheets with 1T-phase. Compared with the pristine 2H-MoS
2
, the bilayer 1T-MoS
2
nanosheets exhibit better electrocatalytic performance for the hydrogen evolution reaction (HER). This facile method should be easily extended to the exfoliation of various transition metal dichalcogenides (TMDs).
Publisher
Tsinghua University Press
