GREEN SYNTHESIS OF SILVER NANOPARTICLES USING LEAF (Vernonia amygdalina) EXTRACTS IN SELECTED SOLVENTS AND IT’S CHARACTERIZATION BY SPECTROCOPIC METHODS AND SCANNING ELECTRON MICROSCOPY.

Amechi, Miracle/O. (2018) GREEN SYNTHESIS OF SILVER NANOPARTICLES USING LEAF (Vernonia amygdalina) EXTRACTS IN SELECTED SOLVENTS AND IT’S CHARACTERIZATION BY SPECTROCOPIC METHODS AND SCANNING ELECTRON MICROSCOPY. Other thesis, Godfrey Okoye University, Enugu.

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Abstract

Nanoscience has been set up recently as a new interdisciplinary science with potential application in medicine, cosmetics, renewable energies, environmental remediation, agriculture among others. Even in the usefulness of nanoscience, a lot of chemicals are used for its production which pose a potential threat to the environment and public health. Thus, the importance of green synthesis. The aim of this study is to synthesize silver nanoparticles AgNPs using Vernonia amygdalina as a reducing and capping agent in various solvents; distilled water, ethanol and methanol. With the range AgNPs being between 1-100nm, the major goal was to determine the degree of reduction of the silver ions (Ag+) to metallic nanosilver (Ag0) in all the sample extracts. The laboratory experiment was carried out to produce the solvent extracts which were used as reducing and capping agents on AgNO3 to synthesize AgNPs of ethanol, methanol and water extract. Characterization in UV- Vis Spectroscopy showed that Surface Plasmon Resonance (SPR) in 414nm, 406nm and 306nm for ethanol, methanol and water extracted AgNPs respectively. FTIR showed the possible presence of AgNPs in ethanol, methanol and water extracted AgNPs at 669.09, 669.38 and 616.17 cm-1 respectively. The Scanning Electron Microscopy (SEM) showed that ethanol, methanol and water extracted AgNPs had values of 335nm, 584nm and 460nm respectively. The morphologies were also obtained as follows; ethanol extracted AgNPs had spherical shaped particles, water extracted AgNPs had thread-like particles and methanol extracted AgNPs had crystal-like particles. Thus, it is safe to say that Vernonia amygdalina extracts has the potential of reducing Ag+ to Ag0.

Item Type:	Thesis (Other)
Subjects:	Q Science > QD Chemistry
Divisions:	Faculty of Natural and Applied Sciences
Depositing User:	Miss. Miracle Ozioma Amechi
Date Deposited:	31 Jul 2018 21:56
Last Modified:	31 Jul 2018 21:56
URI:	http://eprints.gouni.edu.ng/id/eprint/363

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