Open AccessEfficient exfoliation of molybdenum disulphide nanosheets by a high‐pressure homogeniser
Author(s) -
Shang Jingqi,
Xue Feng,
Ding Enyong
Publication year - 2015
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2015.0173
Subject(s) - exfoliation joint , materials science , homogenizer , chemical engineering , molybdenum , transmission electron microscopy , dimethylformamide , dispersant , suspension (topology) , dispersion (optics) , metallurgy , nanotechnology , chromatography , chemistry , solvent , organic chemistry , graphene , engineering , physics , mathematics , optics , homotopy , pure mathematics
A facile and fast approach is demonstrated for the production of well‐dispersed molybdenum disulphide (MoS 2 ) nanosheets through the exfoliation of MoS 2 bulk using a high‐pressure homogeniser in pure solvents. The MoS 2 bulk was infiltrated in dimethylformamide for several hours, then homogenised at 100 MPa for 10 min, followed by centrifugation to obtain few‐layer MoS 2 nanosheets. The structure and morphology of the nanosheets were examined by atomic force microscopy, X‐ray diffraction and transmission electron microscopy. The bulk also had an exfoliation in water and alcohol, but the suspension was unstable. It can be concluded that the energy as well as solvents plays a critical role in the liquid–phase exfoliation. These results provide a physical perspective for understanding the exfoliation of other layered materials in aqueous and ethanol dispersions.