Open AccessAntioxidant and Antibacterial Activities of Biosynthesized Silver Nanoparticles using Aqueous Terminalia catappa Leaf Extracts as Novel Reducing Agent
Author(s) -
Paweena Porrawatkul,
Rungnapa Pimsen,
Saksit Chanthai,
Prawit Nuengmatcha
Publication year - 2020
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2020.22749
Subject(s) - chemistry , terminalia , silver nanoparticle , aqueous solution , reducing agent , antioxidant , dpph , nuclear chemistry , antibacterial activity , surface plasmon resonance , fourier transform infrared spectroscopy , nanoparticle , absorbance , particle size , bacteria , chromatography , organic chemistry , traditional medicine , nanotechnology , chemical engineering , materials science , medicine , biology , engineering , genetics
In this study, silver nanoparticles (AgNPs) were successfully synthesized from aqueous Terminaliacatappa leaf extract that acts as a novel reducing agent. Various parameters, including pH, temperatureand reaction time, were determined. The UV-visible spectra showed the main peak at 416 nm, whichwas the characteristic surface plasmon resonance of AgNPs. The spherical shape and particle size of49 ± 0.01 nm were observed from SEM, TEM and laser particle size analysis (LPSA). FTIR spectra ofthe leaf extract exhibited the characteristic functional groups that should be responsible for Ag+ ionreduction. The EDX spectrum proved that the obtained sample is silver. The antioxidant activity ofAgNPs treated with the leaf extract as determined by the DPPH assay was higher compared to that ofTerminalia catappa leaf extract, and the treated AgNP sample exhibited high antibacterial potentialagainst both Gram-positive and Gram-negative bacteria.