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ZnS thin films have been deposited on a glass substrate by aerosol assisted chemical vapor deposition (AACVD) from the Zinc thiosemicarbazone precursors is reported. This approach exploits the use of Zn(II) thiosemicarbazone complexes as single source precursors. Thiosemicarbazone complexes such as Zn(cinnamtscz) 2 , Zn(4-Clbenztscz) 2 , ZnCl 2 (cinnamtsczH) 2 , ZnCl 2 (4-ClbenztsczH) 2 and ZnCl 2 (thioptsczH) 2 (Where, cinnamtsczH = cinnamaldehyde, 4-ClbenztsczH = 4-chlorobenzaldehyde, and thioptsczH = thiophene 2-carboxaldehyde thiosemicarbazones) were used as single source precursors for the deposition of thin films. They were obtained by treatment of zinc chloride with various thiosemicarbazone as sulfur-containing ligands. The deposition was carried out in the temperature range between 400 and 500 • C on a glass substrate. The X-ray diffraction pattern reveals the hexagonal phase of ZnS thin films. Scanning electron microscopy and atomic force microscopy analysis shows the granular shaped type of surface texture. The energy dispersive X-ray analysis indicates 1:1 stoichiometry of zinc and sulfur. UV-Visible spectroscopy is used to find the optical band gaps of thin films using Tauc's plots.

Bi- or tri- functional catalysts based on atomic layers are receiving tremendous scientific attention due to their importance in various energy technologies. Recent studies on molybdenum disulphide (MoS2) nanosheets revealed that controlling the edge states and doping/modifying with suitable elements are highly important in tuning the catalytic activities of MoS2. Here we report a bulk, single step method to synthesize metal modified MoS2 quantum dots (QDs). Three elements, namely Fe, Mg and Li, are chosen to study the effects of dopants in the catalytic activities of MoS2. Fe and Mg are found to act like dopants in the MoS2 lattice forming respective doped MoS2 QDs, while Li formed an intercalated MoS2 QD. The efficacy and tunability of these luminescent doped QDs towards various electrocatalytic activities (hydrogen evolution reaction, oxygen evolution reaction and oxygen reduction action) are reported here.

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