Abstract
Undoped and TiO2 doped ZnS-MoS2 semiconducting nanocomposite materials were synthesized by bottom up hydrothermal approach to investigate their structural & optical properties. The structural, optical absorption, morphological studies of prepared powder samples were characterized by Powder X-ray diffraction (XRD), Diffusion reflectance spectrophotometer (DRS) and Scanning electron microscopy (SEM) techniques. Powder X-ray diffraction spectra reflect cubic & hexagonal phases of ZnS and hexagonal phase of MoS2. Average crystallite size of synthesized nanocomposites were in the limits of 14–20 nm and also lattice strain, dislocation density are estimated. Surface morphological studies confirms spherical ZnS spheres and MoS2 flakes sheet and with variation of doping concentration the inter-atomic distance between the spherical spheres decreases and forms flower like spherical network on MoS2 flakes sheet EDAX results confirm the chemical composition according to stoichiometry of the samples. With increasing of TiO2 doping concentration in the host lattice, optical energy bandgap decreases indicating the quantum confinement of synthesized samples.
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