Absract

Ultrathin MoS2 nanosheets with thickness of 5–10 nm were successfully synthesized by a facile gas–solid reaction method, using molybdenum trioxide (MoO3) and thiourea as the precursors, and then calcined at 800–850 1C under N2 for 1 h. As-prepared MoS2 samples were characterized by XRD, EDS, FESEM, and TEM. TEM and FESEM results showed that the obtained MoS2 ultrathin nanosheets mainly consisted of 5–10 layers stacking of the monatomic sheets. The influence of temperature on the formation of MoS2 nanosheets was investigated. A possible two-step reaction mechanism is proposed to explain the formation of MoS2 nanosheets on the basis of observations of a temperature-dependent morphology evolution process.