Microwave-assisted green synthesis of silver nanoparticles using dried extracts of Chlorella vulgaris and antibacterial activity studies

Abstract

<jats:title>Abstract</jats:title><jats:p>Green synthesis of metallic nanoparticles (NPs) is acquiring considerable attention due to its environmental and economic superiorities over other methods. This study describes the practical synthesis of silver nanoparticles (AgNPs) through the reduction of silver nitrate solution using an algal source, <jats:italic>Chlorella vulgaris</jats:italic>, as the reducing as well as the stabilizing agent. The energy required for this synthesis was supplied by microwave radiation. The ultraviolet-visible spectroscopy exhibited a single peak related to the surface plasmon absorbance of AgNPs at 431 nm. The AgNPs with high stability (a zeta potential of −17 mV), hydrodynamic size distribution of 1–50 nm, and mostly spherical shape were obtained through a 10 min process. Fourier transform infrared spectroscopy analysis revealed that several functional groups, including carbonyl groups of <jats:italic>C. vulgaris</jats:italic>, play a significant role in the formation of functional NPs. Antibacterial features of the produced AgNPs were verified against those of <jats:italic>Salmonella enterica</jats:italic> subsp. <jats:italic>enterica serovar typhimurium</jats:italic> and <jats:italic>Staphylococcus aureus</jats:italic>, demonstrating a considerable growth inhibition at increasing concentrations of the NPs. As a result, the formed AgNPs can be used as a promising agent against bacterial diseases.</jats:p>

Phycosynthesis of Silver Nanoparticles Using Cladophora Glomerata and Evaluation of Their Ability to Inhibit the Proliferation of MCF-7 and L20B Cell Lines

“…These NPs were also synthesized by Ghareeb et al (2020) utilizing Cladophora species with a 13 nm size. Also, with the help of secondary metabolites from the marine alga, Padinapavonica species (Torabfam and Yüce, 2020) and the green alga, Chlorella vulgaris (Sahayaraj et al, 2012), AgNPs were successfully synthesized. Algae are a prime choice for the biosynthesis of NPs because they are abundant in the secondary metabolites necessary for reducing and capping NPs.…”

Synthesis of Antibacterial Coating Using Chitosan, Polyethylene Glycol and Silver Nanoparticles and Investigation of Their Antibacterial Properties

“…To avoid microbial contamination; silver nanoparticles have been incorporated in polymers for their applications in wound/burn dressings, dental material, catheters, as well as in medical Implants and devices [7][8][9][10]. Due to various applications of silver nanoparticles, various methods have been advised for its production [11][12][13][14][15]. In chemical synthesis of silver nanoparticles, citrate and sodium borohydride are the commonly used reducing agents [16][17][18].…”