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Browsing Physics by Author "AAQIL HUSSAIN"

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    Green synthesis of silver nano-particles using dracaena trifasciata extract
    (UMT, Lahore, 2023) AAQIL HUSSAIN
    There is an increasing industrial need for nanoparticles because of their wide pertinency in several fields like electronic engineering, catalysis, chemical engineering, power, and therapeutic treatment etc. Metal nanoparticles have been usually synthesized through aquatic chemical techniques. The precursors used in those techniques are highly toxic and flammable. In current research, a cheap and ecological friendly method of green synthesis has been proposed for the preparation of silver nanoparticles from silver nitrate solution by using the extract of Dracaena Trifasciata leaves as reducer. We also have used one chemical and one organic agent for capping. The structural, morphological, optical, and chemical characteristics of the synthesized nanoparticles have been analyzed using X-ray crystallography, SEM, UV-Visible spectroscopy and FTIR. XRD analysis of nanoparticles confirmed the development of face-centered cubic structure and phase purity. No additional peaks of foreign impurities have been observed in XRD spectra. The SEM micrographic analysis revealed that silver nanoparticles have smooth sphere-shaped surface. Due to the coating of protective agent, the edges of the crystallites have been brighter than the cores, causing prepared nanoparticles to be in oval and elliptical shapes. The change in internal parameters (e.g., lattice constant, interplanar spacing, broadening and shifting in XRD peaks) and the rise of absorption in the Uv-Vis spectra signified the capping and reduction of silver nanoparticles. Fourier transform infrared spectroscopy confirmed the existence of functional groups and chemical bonds in samples. Such a silver nano particles can be used in electronic devices as they exhibit excellent electrical conductivity, can also use for chemical stabilities, antimicrobial properties etc.