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

Abstract

Selenium as an essential trace element for the health of the humans was used to hydrothermally synthesis of selenium nanoparticle (Se NPs) using Aloe vera leaf extract (ALE). Effects of synthesis parameters namely; amount of ALE (1–5 ml) and amount of Na2SeO3 solution (10–30 ml), on the particle size and colour intensity of the solution containing Se NPs were studied using response surface methodology. FT-IR spectroscopy, UV-Vis spectrophotometry, DLS analyzer and TEM were used to determine the specifications of the ALE and synthesized Se NPs. Obtained results indicated that the ALE contained several bioactive compounds, which they had hydroxyl and amide І groups in their structures and these two functional groups had key roles in the reduction of the selenium ions to form Se NPs and stabilizing of them. Furthermore, spherical fabricated Se NPs using obtained optimum synthesis parameters, 4.92 mL of ALE and 13.03 mL of Na2SeO3 solution, had colour intensity, mean particle size, zeta potential and polydispersity index values of 3.0% a.u., 50 nm, -18 mV and 0.344, respectively according to the DLS analysis. The synthesized Se NPs had also high antibacterial and antifungal activities against 4 selected pathogenic bacteria and spoilage fungi strains.

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

“…Regarding biogenic synthesized Se-NPs, the antimicrobial activities of NPs were documented and confirmed; Aloe vera-synthesized Se-NPs were able to inhibit two species (S. aureus and E. coli), with larger ZOI around S. aureus [12]. Former investigations also indicated the bactericidal influences of the biosynthesized Se-NPs against both mentioned bacterial strains, but with varied potentialities [36,37].…”

“…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].…”

Green approach in fabrication of photocatalytic, antimicrobial, and antioxidant zinc oxide nanoparticles – hydrothermal synthesis using clove hydroalcoholic extract and optimization of the process

“…Small P-values (P < 0.05) were considered as statistically significant [18]. Surface and contour plots were also utilized to better visualize the influences of the synthesized factors on the response factors [19,20]. Graphical and numerical optimizations were applied to predict optimal area and exact values of independent variables to fabricate ZnO NPs with maximum antioxidant and antibacterial activities.…”

Trillium govanianum Wall. Ex. Royle rhizomes extract-medicated silver nanoparticles and their antimicrobial activity

“…Numerous nanoparticles have been formulated using different physical, chemical, and green nanoparticle synthesis techniques. Among all of these, green synthesis methods are known to be the most economical and environmental friendly technique owing to the use of natural compounds in the development of nanoparticles [9]. Various studies have shown the use of different plant extracts for the formulation of AgNPs.…”