Abstract
Green synthesis of nanoparticles can be an important alternative compared to conventional physio-chemical synthesis. We utilized Scadoxus multiflorus leaf powder aqueous extract as a capping and stabilizing agent for the synthesis of pure zinc oxide nanoparticles (ZnO NPs). Further, the synthesized ZnO NPs were subjected to various characterization techniques. Transmission electron microscope (TEM) analysis showed an irregular spherical shape, with an average particle size of 31 ± 2 nm. Furthermore, the synthesized ZnO NPs were tested against Aedes aegypti larvae and eggs, giving significant LC50 value of 34.04 ppm. Ovicidal activity resulted in a higher percentage mortality rate of 96.4 ± 0.24 at 120 ppm with LC50 value of 32.73 ppm. Anti-fungal studies were also conducted for ZnO NPs against Aspergillus niger and Aspergillus flavus, which demonstrated a higher inhibition rate for Aspergillus flavus compared to Aspergillus niger.
Highlights
Nanotechnology is a field of intense interest
Biologically-mediated synthesis is further classified into eco-friendly synthesis, which is comprised of plants and plant sources with the corresponding advantages of simplification and lower cost [6,7,8,9,10,11,12,13]
Many researchers had reported on the anti-fungal activity of zinc oxide nanoparticles (ZnO NPs), which proved to us that ZnO NPs could be utilized as fungicidal agents [19,20,21,22,23]
Summary
Nanotechnology is a field of intense interest. The process of nanotechnology has been generally classified into three techniques: computational, wet, and dry. For this method of green synthesis of nanoparticles, our research group chose Scadoxus multiflorus (S. multiflorus) leaf powder aqueous extract (SA) as a green source This plant is said to be one of the ancient medicinal plants of India, and belongs to the Caesalpiniaceae family. Many researchers had reported on the anti-fungal activity of ZnO NPs, which proved to us that ZnO NPs could be utilized as fungicidal agents [19,20,21,22,23] Overall, this manuscript describes the green synthesis of ZnO NPs using SA, and the subjection of the synthesized particles to various application studies, such as larvicidal and ovicidal activities against Aedes ageypti (A. ageypti). The synthesized particles, subjected to two different fungal strains, i.e., A. flavus and A. niger, were studied and are reported
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