Abstract
AbstractGreen 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, Chlorella vulgaris, 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 C. vulgaris, play a significant role in the formation of functional NPs. Antibacterial features of the produced AgNPs were verified against those of Salmonella enterica subsp. enterica serovar typhimurium and Staphylococcus aureus, 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.
Highlights
Nanoscience stands out among the futuristic fields of research
Being capable of stabilizing AgNPs, proteins and sugars of biological molecules used as reducing and stabilizing agents during synthesis are salient biotic components contributing to NP interactions with other organisms as well as microorganisms, which results in enhanced antimicrobial properties of the formed NPs
This study demonstrated an unsophisticated green synthesis of AgNPs, as a feasible alternative to the chemical as well as physical methods, by effectual bioreduction of Ag+ using C. vulgaris, actively acting as reducing and stabilizing agents
Summary
Nanoscience stands out among the futuristic fields of research. Within this field, the synthesis of workableThis work is licensed under the Creative Commons284 Milad Torabfam and Meral Yüce capping feature of components in microorganisms, addition of extra stabilizers is not required [11].It is known that metal NPs, as an alternative to antibiotics, exhibit outstanding antibacterial properties [15]. Being capable of stabilizing AgNPs, proteins and sugars of biological molecules used as reducing and stabilizing agents during synthesis are salient biotic components contributing to NP interactions with other organisms as well as microorganisms, which results in enhanced antimicrobial properties of the formed NPs. By making contact with the cell membrane and without penetrating it, AgNPs can apply the antibacterial effect and cause the death of microorganisms [18,19]. In 2,000, the required energy for the synthesis of PbTiO3 NPs using ethylene glycol as a reducing agent was provided by microwave. This new method of supplying energy was investigated by Palchik et al [22]. It is noteworthy that the shape and morphology of the formed nanostructures can be controlled in this procedure [20]
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