Journal
CRYSTALS
Volume 13, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/cryst13030450
Keywords
selenium nanoparticles; antimicrobial activity; fungi; biosynthesis and decolorization
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In this study, selenium nanoparticles (SeNPs) were synthesized using a green and eco-friendly method, with Aspergillus terreus extract as a reducing and stabilizing agent. The synthesized SeNPs showed spherical shapes and sizes less than 100 nm. The SeNPs demonstrated antibacterial activity against both Gram-positive and Gram-negative bacteria, as well as rapid degradation of malachite green dye.
Selenium (Se) is a nutritional component necessary for animal and plant development and reproduction. Selenium nanoparticles (SeNPs) have a high absorption rate during routine supplementation. In the current study, a cell-free extract of Aspergillus terreus was used as a reducing and stabilizing agent in the synthesis of SeNPs using a green and eco-friendly method. The mycosynthesized SeNPs were characterized by UV-visible spectrophotometry, Fourier transform infrared spectroscopy, X-ray diffraction spectroscopy, dynamic light scattering, transmission electron microscopy, and scanning electron microscopy. The results of the characterization process showed that the mycosynthesized SeNPs had spherical shapes and sizes less than 100 nm. Results showed that mycosynthesized SeNPs exhibited promising antibacterial activity against both Gram-positive and Gram-negative bacteria where inhibition zones were 14, 20, 16, and 13 mm toward S. haemolyticus, S. aureus, E. coli, and K. pneumoniae, respectively. However, it had weak antifungal activity against C. albicans, where the inhibition zone was 12 mm. The efficacy of mycosynthesized SeNPs for the decolorization of malachite green dye was investigated. Results illustrated that SeNPs exhibited rapid biodegradation of malachite green dye, reaching up to 89% after 240 min. In conclusion, SeNPs were successfully biosynthesized using A. terreus and demonstrated both antimicrobial and photocatalytic activities.
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