Abstract
AbstractThe current study was conducted to assess the potential of ginger rhizome extract (Zingiber officinale) for the synthesis of silver nanoparticles (AgNPs) through the green method and its mitigating activity against pathogenic bacterial strains. AgNPs were synthesized through a simple one-step approach and characterized by UV-Visible (UV-Vis) spectroscopy, powder X-ray diffraction (PXRD), transmission electronic microscopy (TEM), and energy dispersive X-rays spectroscopy (EDS). PXRD and TEM results of AgNPs showed the face central cubic structures and predominantly spherical structures with a size of 6.5 nm. EDS analysis confirms the elemental silver in nanoparticles. Moreover, the impact of the pH, as well as temperature, during the synthesis of AgNPs has also been investigated. At 25°C and pH 5, there was no significant peak for AgNPs in the absorption spectra. However, with an increase in temperature from 25°C to 85°C and pH 5 to pH 11, particles started attaining the spherical shape of different sizes due to an increase in the reduction rate. The AgNPs displayed effective results against selected pathogenic strains,Pseudomonas aeruginosa(MTCC 424), Methicillin-resistantStaphylococcus aureus(ATCC 43300), and fungusCandida albicans(KACC 30003). The prepared AgNPs exhibited excellent antioxidant activity and catalytic reduction of methyl orange with the pseudo-first-order rate constant of 3.9 × 10−3.
Highlights
Silver NPs have extraordinary optical, electrical, and thermal properties and are utilized in products ranging from cell to an organism
In contrast to what previously reported by Pulicaria glutinosa plant extract AgNPs, the current study revealed that by increasing temperature, no significant increase in the SPR of AgNPs was observed [55]
The degradation of methyl orange (MO) on the substrates decorated with Ag nanostructures is likely to proceed through the mechanism depicted in Scheme 2
Summary
Silver NPs have extraordinary optical, electrical, and thermal properties and are utilized in products ranging from cell to an organism. Other applications including photonic devices and molecular diagnostics take benefit of the exclusive optical characteristics of these nanomaterials [1]. The use of AgNPs is increasing in the mutual application of antimicrobial coatings. The number of metallic nanoparticles’ application increases for biomedical research, as therapeutic potential [2], contrast agents [3], organic synthesis [4,5], and theranostic agents for bio-imaging [6]. Silver nanoparticles are the most efficient because they have a strong antimicrobial effect on fungus [12], bacteria [13], and other eukaryotic microorganisms, as theranostic [6] and antitumor agents [14]. Greener processes eliminate the use of dangerous reagents [20] and are of low cost, more economical, and alternative to the conventional approaches
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