A Facile Method for Synthesis of CdS/P(St-сo-MMA) Nanorods Composite and Characterization of its Optical Properties

Abstract:

Composite of Cadmium sulphide (CdS) nanoparticle on the surface of polystyrene- co- maleic anidride (St-co-MMA) were prepared via surfactant free emulsion polymerization. Methylmetacrylate (MMA) was used as auxiliary monomer which co-polymerized with styren (St) and provided the side for coordinating with Cd²⁺. By the coordination of Cd²⁺ ions to methyl metacrylate, decoration of the Cd²⁺ ions on the surface of copolymer were prepared successfully. With the release of S^2- ions from the thioacetamide (TAA), CdS was formed on the surface of nanorods copolymer in facile method. Fourier transform infrared spectroscopy (FT-IR) of nanocomposite was confirmed the polymerization of monomers. Structure and morphology of CdS nanoparticles have been characterized using x-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD measurements suggest the cubic structure for CdS and the particles size was estimated to about 3.35 nm by applying Scherrer’s equation. The SEM analysis confirmed the nanorode structure of CdS/ (St-co-MMA) composite. The photoluminescence (PL) and UV–Vis spectroscopy revealed the quantum confinement effect in the CdS/ (St-co-MMA) nanocomposite. Using effective mass approximation (EMA) method particle sizes were calculated from the shift in optical band gap. The thermal properties of the CdS/ (MMA-co-St) were explored by thermal gravimetric analysis (TGA). The improved thermal stability of nanocomposite was attributed to the interaction of CdS nanoparticles with polymer. The CdS/ (MMA-co-St) nanocomposite exhibited a glass transition temperature around 250^◦C.

• Periodical: Journal of Nano Research (Volume 37)
• Pages: 20-27
• DOI: https://doi.org/10.4028/www.scientific.net/JNanoR.37.20
• Online since: December 2015
• Authors: Asghari Jila*, Khoje Golshad
• Keywords: CdS Nanoparticles, Glass Transition Temperature, Nanocomposite, Optical Band Gap, Optical Properties, Surfactant-Free, Thermal Stability

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