Fast and Efficient Preparation of Exfoliated 2H MoS 2 Nanosheets by Sonication-Assisted Lithium Intercalation and Infrared Laser-Induced 1T to 2H Phase Reversion

Exfoliated 2H molybdenum disulfide (MoS2) 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 MoS2, which combines fast sonication-assisted lithium intercalation and infrared (IR) laser-induced phase reversion. We found that the complete lithium intercalation of MoS2 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.

• NN
  National Natural Science Foundation of China

  Award: 21222608
• MO
  Ministry of Education of the People's Republic of China

  Award: B06006
• SA
  State Administration of Foreign Experts Affairs

  Award: B06006
• AR
  Army Research Office

  Award: W911NF-11-1-0362