Abstract:
Nanoparticle based materials find a lot of interest as antibacterial agents. ZnS
nanoparticles are exhibit excellent antibacterial effect. Here we present our studies on synthsis,
characterization and photocatalytic property of mercury doped and nitrogen doped ZnS
nanoparticles and compared with undoped ZnS nanoparticles. The photocatalytic property was
studied by determining antibacterial activity of Hg-doped ZnS and dye degradation ability of 1-Igdopcd
ZnS and N-doped ZnS nanoparticles. The ZnS nanoparticles were synthesized by
chemical precipitation method. The synthesized nanoparticles were characterized by an array of
techniques, namely, IJV-Visible spectroscopy, Diffuse Reflectance Spectroscopy (DRS) and
fluorescence spectroscopy, X-ray diffractometry (XRD) analysis, Scanning Electron Microscopy
(SEM) with Energy Dispersive X-ray Analysis (EDAX) and Transmission electron microscopy
(TEM). In our study we also reported reactive oxygen species (ROS) mediated membrane lipid
oxidation of E. coil treated with Hg doped and undoped ZnS. The antibacterial effects of these
ZnS NPs were studied by measuring the growth curve of E. coil cells of K-12 strain, in which
mercury doped ZnS NPs showed enhanced antibacterial activity compared to undoped ZnS NPs.
The results of antibacterial studies and their possible mechanism have been discussed in this
work. Dye degradation studies were carried out by monitoring decolorization of methyl blue by
treating photocatalyst of different photocatalyst concentration. Degradation kinetic studies were
done by using both photocatalysts by recording absorbance of decolorized dye by UV-visible
spectroscopy
