Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (5): 1027-1032.doi: 10.3866/PKU.WHXB201702081

• ARTICLE • Previous Articles     Next Articles

Polyol-Mediated Synthesis of MoS2 Nanosheets Using Sulfur Powder as the Sulfur Source

Hui WANG1,De-Chun ZOU1,2,*()   

  1. 1 Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology, Beijing 100083, P. R. China
    2 College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
  • Received:2016-11-23 Published:2017-04-20
  • Contact: De-Chun ZOU E-mail:dczou@pku.edu.cn
  • Supported by:
    the"Thousand Talents"Program of China for Pioneering Researchers and Innovative Teams, National Natural Science Foundation of China(51573004);the"Thousand Talents"Program of China for Pioneering Researchers and Innovative Teams, National Natural Science Foundation of China(91333107);Natural Science Foundation of Beijing, China(Z160002)

Abstract:

MoS2 nanosheets are prepared with sulfur powder and Na2MoO4 by a one-pot two-phase method at 170-200 ℃ for 8 h. In addition, a three-step growth mechanism based on the aggregation and coalescence model is proposed. The reassembly of sulfur powder ensures the transformation from sulfur powder to H2S to reduce Na2MoO4 and plays a key role in the successful preparation of MoS2 nanosheets. The as-prepared MoS2 nanosheets are rich in unsaturated sulfur atoms, probably resulting from the dislocation cores of the MoS2 nanosheets, which have been found to be beneficial for hydrogen evolution reaction catalysis. The method and growth mechanism adopted in this study may be applied to other transition metal dichalogenides for similar structures. The facile and green method provides an alternative for the preparation of MoS2 nanosheets.

Key words: MoS2 nanosheet, Sulfur powder, Aggregation and coalescence model, Ethylene glycol, Two-phase method

MSC2000: 

  • O643