Biosynthesis, characterization and antimicrobial activities assessment of fabricated selenium nanoparticles using Pelargonium zonale leaf extract

Abstract

The present study focuses on the biogenic synthesis of selenium nanoparticles (Se NPs) using Pelargonium zonale leaf extract under microwave irradiation. Response surface methodology was used to evaluate the effects of the synthesis parameters, namely amounts of the leaf extract (0.5–2.5 ml) and amounts of the 10 mm sodium selenite solutions (15–65 ml), at constant microwave heating (4 min), on the concentration and particle size of the fabricated Se NPs, optimize the synthesis conditions and verify the generated models and the procedures. The obtained results indicated that Se NPs with preferable attributes of mean particle size (50 nm), zeta potential (−24.6 mV), absorbance [34.6% absorbance units (a.u.)] and broad absorption peak (319 nm) were formed at the optimum synthesis conditions including amounts of 1.48 ml and 15 ml Pelargonium leaf extract and sodium selenite solution, respectively. The antibacterial activities of the synthesized Se NPs against Escherichia coli and Staphylococcus aureus indicated that the created NPs had higher antibacterial activities toward the Gram-positive bacteria. Furthermore, the synthesized Se NPs indicated higher antifungal activities against Colletotrichum coccodes and Penicillium digitatum.

Phytogreen synthesis of multifunctional nano selenium with antibacterial and antioxidant implications

“…Reduction in E. coli and P. aeruginosa cells was also perceived after 24 h. A decrease of 2.46, 2.95 7). It was evident that the maximum killing of E. coli, P. aeruginosa and S. aureus cells with nSe was observed after 12 h. Thus, it can be strongly interpreted that the nSe effectively inhibited the growth of Gram positive and Gram negative bacterial strains in a time dependent manner, thereby highlighting its bacteriostatic effect [59,60].…”

Aloe vera leaf extract mediated green synthesis of selenium nanoparticles and assessment of their In vitro antimicrobial activity against spoilage fungi and pathogenic bacteria strains

“…The size distribution of the synthesized Se NPs is also shown in Figure 7. However, our previous study on green synthesis of Se NPs using Pelargonium zonale indicated that Se NPs with mean particle size, PDI and zeta potential values of 136 nm, 0.321 and -24.6 mV, respectively were fabricated at obtained optimum synthesis conditions using 1.48 mL Pelargonium zonale leaf extract and 15 mL of Na 2 SeO 3 solution [29]. The obtained results indicated that Aloe vera leaf extract could be effectively synthesized Se NPs with smaller particle size and higher stability, due to high value of the zeta potential, as compared to the Pelargonium zonale leaf extract.…”

Phytosynthesis of selenium nanoparticles using the costus extract for bactericidal application against foodborne pathogens

“…Selenium nanoparticles (Se-NPs) were evidenced to possess extra bioactivities and functionalities as potent antioxidant, antibacterial, antifungal and anticancer agents [8][9][10][11][12][13].…”

“…The biosynthesis of metal NPs, and specifically Se-NPs, was efficaciously achieved using numerous biological reducing agents, including plant extracts, resins and microbial metabolites [13][14][15][16][17][18]. Compared to physicochemical protocols of NP synthesis, biological green synthesis of Se-NPs has elevated eco-friendly, non-toxic and biosafety advantages [10]. From the biological green synthesis agents, the employment of plant extracts in NP synthesis (phytosynthesis) is reported to be a simple, effectual and cost-effective method, compared to other biosynthesis agents involving microorganisms and enzymes [11].…”