• 文献标题:   Liquid exfoliation of mechanochemically nanostructured tungsten disulfide to a graphene-like state
  • 文献类型:   Article
  • 作  者:   POSUDIEVSKY OY, KHAZIEIEVA OA, KONDRATYUK AS, CHEREPANOV VV, DOVBESHKO GI, KOSHECHKO VG, POKHODENKO VD
  • 作者关键词:   graphenelike ws2, mechanochemical solventless nanostructuration, structural spectral characterization
  • 出版物名称:   NANOTECHNOLOGY
  • ISSN:   0957-4484 EI 1361-6528
  • 通讯作者地址:   Natl Acad Sci Ukraine
  • 被引频次:   4
  • DOI:   10.1088/1361-6528/aaa381
  • 出版年:   2018

▎ 摘  要

The possibility of the efficient preparation of graphene-like 1H-WS2 by the primary solventless nanostructuration of bulk 2H-WS2 by means of its mechanochemical treatment in the presence of a chemically inert agent (NaCl) and the subsequent liquid exfoliation of the nanostructured 2H-WS2 in an organic solvent is shown for the first time. The shear stresses generated during the grinding of the WS2/NaCl mixture caused the formation of WS2 particles with a reduced number of layers, while the stresses normal to their surface led to their cracking and a significant reduction in lateral size. The graphene-like morphology of the 1H-WS2 nanoparticles in the prepared dispersions is confirmed by atomic force microscopy and Raman spectroscopy. The semiconducting character of 1H-WS2 is supported by electron absorption and x-ray photoelectron spectroscopy data.