Abstract
Pristine Cadmium Sulphide (CdS) and Polyvinylpyrrolidone (PVP) capped CdS nanoparticles have been synthesized by co-precipitation method. X-ray diffraction (XRD) analysis reveals that the CdS nanoparticles have a hexagonal structure. Field emission scanning electron microscopy (FESEM) with Energy dispersive x-ray spectroscopy (EDX) have been employed to study morphology and elemental composition for the prepared samples. From FESEM images, the average particle size of nanostructures is found to be 23.6 nm for PVP capped CdS and 16.2 nm for pristine CdS. Absorption spectroscopy reveals that the bandgap of 2.48 eV and 2.23 eV for pure CdS and PVP capped CdS nanoparticles respectively. Fourier transforms infrared (FTIR) spectroscopy provides information about the functional groups present in the samples. Out of these two samples, CdS nanoparticles with PVP polymer have been used as a gas sensing application at room temperature for various gases like N2, NH3, O2, and Ar because it shows the better properties than the pure CdS nanoparticles.
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