Synthesis of PbS/poly (vinyl-pyrrolidone) nanocomposite |
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Authors: | Jayesh D. Patel |
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Affiliation: | Dr. K.C. Patel Research and Development Centre, Education Campus-Changa, At- Changa, Tal.-Petlad, Anand, Gujarat 388421, India |
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Abstract: | A simple solution growth method for synthesis of nanocomposite of PbS nanoparticles in poly(vinyl-pyrrolidone) (PVP) polymer is described. The nanocomposite is prepared from methanolic solution of lead acetate (PbAc), thiourea (TU) and PVP at room temperature (∼27 °C). Optical absorption spectrum of PbS/PVP nanocomposite solution shows strong absorption from 300 to 650 nm with significant bands at 400 and 590 nm which is characteristic of nanoscale PbS. Spin-coated nanocomposite films on glass have an absorption edge at ∼650 nm with band gap of 2.55 eV. Fourier transform infrared (FTIR) spectroscopy of PbS/PVP nanocomposite and PVP shows strong chemical bond between PbS nanoparticles and host PVP polymer. The transmission electron microscope (TEM) images reveal that 5-10 nm PbS particles are evenly embedded in PVP polymer. The formation of PbS is confirmed by selective area electron diffraction (SAED) of a typical nanoparticle. |
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Keywords: | A. Composites B. Chemical synthesis C. Electron microscopy D. Microstructure D. Optical properties |
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