Abstract
Nanomaterials have gained much relevant in the world of science due to their applications in catalysis, wastewater treatment and desulfurization of fossil fuels, biotechnology, pharmaceuticals and medicine. The green approach of nanoparticle synthesis employs the use of non-toxic reagents and is now preferred to the other methods which include thermal decomposition, electrochemical, photochemical, microwave assisted process chemical methods. Silver nanoparticle was biosynthesized using flower extract of Musa acuminata as reducing and capping agents. The synthesized silver nanoparticle was confirmed by the colour change after addition of the flower extract of Musa acuminata into silver nitrate solution. The silver nanoparticle was characterized by UV–Visible spectrophotometer, scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDX), and Fourier transform infrared (FTIR) spectrophotometer. The result of SEM reveals the formation of silver nanoparticle which was spherical in shape with varying sizes ranged between 20-30 nm. The biosynthesized silver nanoparticle gave absorption at 375 nm, revealed silver metal as the most abundant element, vibrational bands indicating the presence of quinone, amides and conjugated ketone which served as reducing and capping agent. The bio-synthesized silver nanoparticles revealed potent antibacterial activity and the economical synthesis of silver nanoparticle from aqueous flower extract of Musa acuminata which is ecofriendly. Keywords :Green synthesis; silver nanoparticles; flower extract; capping agents; antibacterial activity; scanning electron microscopy. DOI : 10.7176/CMR/11-7-02 Publication date :September 30 th 2019
Highlights
Nanomaterials can be useful in such areas as catalysis [1, 2], medicine [3], waste water treatment [4,5,6,7] and desulfurization [8, 9]
2.3 Characterization of the biosynthesized AgNPs The AgNPs was characterized using UV-Vis spectrophotometer, Fourier transform Infrared spectrophotometer (FTIR), Scanning Electron Microscope (SEM), Energy Dispersive X-ray (EDX) 2.3.1 UV-Vis spectrophotometer The formation of AgNPs was monitored through visual observation of the change of colour and measurement of the maximum absorbance using UV–visible spectrophotometer model 6715
UK) 2.3.2 Fourier Transform Infrared Spectrophotometer To give qualitative and preliminary analysis of the main functional groups that might be involved in nanoparticle synthesis, FT-IR analysis was performed on the AgNPs and concentrated Musa acuminata aqueous extract using Fourier Transform Infrared Spectrometer (Perkin Elmer Spectrum 100 series spectrometer, USA)
Summary
Nanomaterials can be useful in such areas as catalysis [1, 2], medicine [3], waste water treatment [4,5,6,7] and desulfurization [8, 9]. 2.3 Characterization of the biosynthesized AgNPs The AgNPs was characterized using UV-Vis spectrophotometer, Fourier transform Infrared spectrophotometer (FTIR), Scanning Electron Microscope (SEM), Energy Dispersive X-ray (EDX) 2.3.1 UV-Vis spectrophotometer The formation of AgNPs was monitored through visual observation of the change of colour and measurement of the maximum absorbance using UV–visible spectrophotometer model 6715 (Jenway Ltd. Essex, UK) 2.3.2 Fourier Transform Infrared Spectrophotometer To give qualitative and preliminary analysis of the main functional groups that might be involved in nanoparticle synthesis, FT-IR analysis was performed on the AgNPs and concentrated Musa acuminata aqueous extract using Fourier Transform Infrared Spectrometer (Perkin Elmer Spectrum 100 series spectrometer, USA). UK) 2.3.2 Fourier Transform Infrared Spectrophotometer To give qualitative and preliminary analysis of the main functional groups that might be involved in nanoparticle synthesis, FT-IR analysis was performed on the AgNPs and concentrated Musa acuminata aqueous extract using Fourier Transform Infrared Spectrometer (Perkin Elmer Spectrum 100 series spectrometer, USA) This was conducted at the University of Ibadan, Department of Geology, Nigeria. 2.4 Antimicrobial activities of synthesized AgNPs Silver nanoparticles exhibit promising applications in several biomedical fields such as biomedicine, drug delivery and antiangiogenics [37].The AgNPs was tested against two gram positive (S. aureus and B. subtilis) www.iiste.org shown in Plates 1 below and two gram negative microbes (E. aerogenes and E. coli) shown in Plates 2 below to evaluate their antimicrobial activities
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