Algae-mediated biosynthesis of zinc oxide nanoparticles from Cystoseira crinite (Fucales; Sargassaceae) and it's antimicrobial and antioxidant activities

Document Type : Original Article

Authors

1 Botany and microbiology department, Faculty of Science, Al-Azhar University

2 Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt

3 Soil Microbiology Department, Soils, Water and Environment Research Institute, Agricultural Research Center, El-Orman, Giza, Egypt.

Abstract

Zinc oxide nanoparticles (ZnO-NPs) have gained attention due to their distinctive properties and applications. In the current study, we developed an eco-friendly, economical, and green route for the synthesis of ZnO-NPs using the aqueous extract of the brown marine alga Cystoseira crinita (Fucales; Sargassaceae). ZnO-NPs were characterized by UV-Vis spectroscopy, transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and dynamic light scattering (DLS). The antimicrobial and antioxidant activities were investigated. The UV absorption peaks at 268 nm and 360 nm confirm the formation of ZnO-NPs., and XRD patterns indicated the crystalline nature of ZnO-NPs. The TEM revealed that the size of ZnO-NPs was ranged between 23 to 200 nm corresponding to DLS, while the shape is multilayered rectangular particles. FTIR analysis revealed that phenolic compounds and proteins were the reducing and capping agents. ZnO-NPs showed antimicrobial activities against Bacillus cereus, Staphylococcus aureus, Escherichia coli, Salmonella typhi, Candida albicans, and Aspergillus niger, furthermore, showed moderate DPPH radical-scavenging activity.

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History

  • Receive Date: 26 July 2021
  • Revise Date: 22 October 2021
  • Accept Date: 28 October 2021

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