Hydrothermal-assisted shearing exfoliation for few-layered MoS₂ nanosheets

Abstract

A facile exfoliation method based on hydrothermal-shearing exfoliation to obtain MoS2 nanosheets.

Synthesis and Photoluminescence Properties of MoS2/Graphene Heterostructure by Liquid-Phase Exfoliation

“…Lattice vibrations and the intralayer bonding in stacked few-layered crystallites were perturbed by weak van der Waals interlayer interactions. The E 2g mode assigned to the opposite vibration of S atoms with respect to the Mo atom and the out-of-plane vibration of only S atoms in opposite directions yields the A 1g mode . The layer thickness-dependent frequency shift of both modes has been examined, and the frequency of the E 2g peak decreases while that of the A 1g peak increases with increasing layer thickness.…”

Removal and degradation of mixed dye pollutants by integrated adsorption-photocatalysis technique using 2-D MoS2/TiO2 nanocomposite

“…In the case of 10 wt %, MoS 2 coated TiO 2 (TM 10%), the aggregated nanoflakes presence in the pristine MoS 2 became debundled by few-layer sheets (Figure 2 (f)). These debundled few-layer MoS 2 nanosheets are coated on the TiO 2 surface, due to high van der Waal force during hydrothermal synthesis (Wu et al, 2019) (Duong et al, 2017) where the TiO 2 nanoparticles act as a substrate for the growth of a few-layered 2-D MoS 2 nanoflake. It was difficult to differentiate the TiO 2 nanoparticles and MoS 2 nanoflakes from SEM images (Figure S1).…”

Study on the Performance of Ni–MoS2 Catalysts with Different MoS2 Structures for Dibenzothiophene Hydrodesulfurization

“…The catalyst activity was found to be influenced by several key factors, including the quantity of active sites in MoS 2 , the presence of sulfur vacancies, and the concentration of active components (Ni–Mo–S and Ni x S y ) within the catalyst. ,, As the hydrothermal treatment temperature increases, the lateral size, the number of stacked layers, and S/Mo atomic ratio of MoS 2 in the catalyst first decrease and then increase (Tables , , and ), reaching a minimum when the hydrothermal treatment temperature is 150 °C, i.e., in the following order: H-NiMo-150–400 < H-NiMo-120–400 < H-NiMo-180–400 < H-NiMo-90–400 < H-NiMo-200–400. The smaller lateral size of MoS 2 and the reduced number of stacked layers are more favorable for the exposed active sites. , Additionally, these factors promote the formation of a higher proportion of Ni–Mo–S and Ni x S y during the calcination process, thereby contributing to the improved activity of the catalyst. , At the same time, the smaller S/Mo ratio indicates the higher number of S vacancies in the catalyst, − which helps to improve the activity of the DBT reaction on the catalyst. Therefore, the order of activity of the DBT reaction on the catalyst is consistent with the results of XRD (Figure and Table ), TEM (Figure and Table ), ERP (Figure ), SEM-EDS (Table ), and XPS (Figure and Table ) characterization.…”