Low-cost and eco-friendly synthesis of silver nanoparticles using coconut (Cocos nucifera)oil cake extract and its antibacterial activity

Abstract

The present study reports the simple, inexpensive, eco-friendly synthesis of silver nanoparticles (AgNPs) using coconut oil cake extract. Scanning electron microscopy-energy dispersive spectroscopy peak at 3 keV confirmed the presence of silver. Transmission electron micrograph showed that nanoparticles are mostly circular with an average size of 10-70 nm. The results of the X-ray powder diffraction analysis (2θ = 46.2, 67.4 and 76.8) indicated the crystal nature of the AgNPs. Fourier transform infrared spectroscopy analysis indicates that proteins present in the oilcake extract could be responsible for the reduction of silver ions. The synthesized AgNPs (1-4 mm) reduced the growth rate of multi-antibiotic-resistant bacteria such as Aeromonas sp., Acinetobacter sp. and Citrobacter sp. isolated from livestock wastewater.

Synthesis of silver-anchored polyaniline–chitosan magnetic nanocomposite: a smart system for catalysis

“…Fig. 2A [57][58][59] These XRD data match with FTIR spectra and therefore they prove the presence of magnetite and silver nanoparticles on the PANI-CS-Fe 3 O 4 nanocomposite.…”

Augmented photocatalytic, antibacterial and antifungal activity of prunosynthetic silver nanoparticles

“…PCFE phytochemicals reduced and stabilized the DIBSNPs and SLEBSNPs maximally at longer incubation period of 150 min. The augmented absorbance and intense dark brown colour turning to grey indicated the formation of greater [15,16]. Both the reactions in dark as well in sunlight exposed generated 442 and 410 nm absorption maxima respectively thus pointing towards the possibility of prunosynthesis of BSNPs in sunlight where no additional magnetic stirring and heat were provided as in case of DIBSNPs.…”

Biosynthesis of Cr(III) nanoparticles from electroplating wastewater using chromium-resistant Bacillus subtilis and its cytotoxicity and antibacterial activity

“…However, no growth inhibition was observed in the control wells. Smaller size and larger surface area of the biofabricated Cr(III) nanoparticles enable efficient interaction with the bacterial cell walls and make them more penetrating than macro-sized structures (Azam et al 2012, Govarthanan et al 2016, Konwarh et al 2011. Moreover, the spherical shape of the synthesized Cr(III) nanoparticle has a critical role in antibacterial activity (Konwarh et al 2011).…”