Outline
- Abstract
- Keywords
- 1. Introduction
- 2. Experiment
- 3. Results and Discussion
- 4. Conclusion
- Acknowledgments
- Appendix A. Supplementary Materials
- References
رئوس مطالب
- چکیده
- کلیدواژه ها
- 1. مقدمه
- 2. بخش تجربی
- 3. نتایج و بحث
- 4. نتیجهگیری
Abstract
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 °C 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.
Keywords: Gas–solid reaction - MoS2 - Multilayer structure - Nanocrystalline materialsConclusions
In summary, a facile route for fabricating ultrathin MoS2 nanosheets was presented by the reaction of MoO3 and thiourea in a nitrogen atmosphere at temperature of 800–850 1C for 1 h. Ultrathin MoS2 nanosheets with thickness 5–10 nm and lateral size of about 100 nm were successfully synthesized through a two step reaction including thiourea decomposition and MoO3 sulfurization. The experimental results suggest that temperature plays a crucial role in the formation of MoS2 nanosheets. The approach presented here can be extended to synthesize other metal sulfides nanomaterial.