Synthesis and Characterization of CdS/Polypyrrole Core/Shell Nanocomposites with Controlled Grain Size

Article history: Received 20 March 2019 Accepted 29 April 2019 Available online 04 June 2019 Many challenges of core/shell nanostructures for various applications still exist. The structure including the diameter, length, spacing and the thickness of the core or shell is difficult to control precisely. Metal nanoparticles used as various types of catalysts adsorbents and sensors. They have applications in optical, electronic and magnetic devices. Majority of these applications significantly depend on the size of the nanoparticles. Therefore, the synthesis of nanoparticles with controlled grain size is important. In the present work, Cadmium sulfide (CdS) was used as the core material which coated by the polypyrrole (PPy). To form the core and the shell set, the diameter fixed and measured theoretically. The calculated amount is used to prepare the shell which is formed by addition polymerization. The XRD studies are used to determine the particle size of the core shell nanocomposite. The average particle size of CdS and CdS/PPy is 13 nm and 15 nm respectively. Fourier transform infrared (FTIR) spectra and UV-Vis spectra are used to characterize the structure and to calculate the band gap of the core/shell nanocomposite. The AFM studies give the surface morphology of the samples.