MoS2 Nanosheets for HER and LIB

Very high surface area thin nanosheets of MoS2, with also low lateral dimension, as well as high number of edges sites, were prepared via a solvent free, easily controllable and scalable process. The syntheses were performed by thermolysis of ammonium thiomolybdates (NH4)2MoS4 in a continuous flow reactor, monitored with a mass spectrometer. The precursor decomposition was promoted in the temperature range 25-400 °C, obtaining amorphous MoS2. Nanosheets were obtained thought a successive annealing, while material order can be improved by progressively increasing temperature and time. It was found that the annealing time at the end of the first step determines a reduction of the final nanosheets lateral size and number of layers. The samples were characterized by Raman Spectroscopy, Scanning (SEM) and Transmission (TEM-EDS) Electron Microscopy, thermogravimetric analysis (TG-DTG-MS), X-ray diffraction (XRD).