21. Green synthesis of silver nanoparticles by Adhatoda vasica L.

Abstract

Biological approaches have essential part in Nanotechnological field. Green methods are expected to minimize environmental problems. Silver nanoparticles manufactured by means of Adhatoda Vasica L leaf extract. Ag ions decline as well as formation of Silver nanoparticles (AgNPs) were gauged by Ultra violet- vis (UV–Vis) spectroscopy, Fourier transform infrared spectroscopy (FTIR) as well as X‐ray powder diffraction (XRD) studies showed crystalline nature of silver NPs with dimension series from twenty nanometer to fifty nanometers. The UV/Vis spectrophotometry reveals the capping action of Adhatoda Vasica L. and the color change after the reaction has proceeds among AgNO3 and Adhatoda Vasica L. leaf extract. The FTIR identify the capping ability of Adhatoda Vasica L. that may liable for decline of Ag+ as well as stability of Ag nanoparticles. Currently, ejection of harmful colorants over fabric industries in H₂O bodies similar to lakes, rivers as well as groundwater has converted to severe case, which imparts to rise in pollution intensities considerably. The wastewater having heavy metals also becomes an alarming factor now-a-day. The fungal infections spreading day by day and the algal blooms also polluting the environment as well as the oxidative substances are also more harmful to the environment. In the present study we investigated green-synthesized usage Ag nanostructured particles for dyes destruction e.g. methylene blue and methylene green. It was found that the AgNPs has great potential to heavy metals deletion like cadmium as well as zinc. They showed antioxidant property against 2,2-diphenyl-1-picrylhydrazyl (DPPH). The AgNPs significantly inhibit the fungal growth (Aspergilus specie LC.33) and algal growth (Chlorella vulgularis). It is concluded from the study that biogenic AgNPs have many environmental applications. Adhatoda Vasica L. leaf extract could commercially utilize as Silver (Ag) nanoparticles (Green Synthesis).

Keywords: Adhatoda vasica L.; AgNPs; Aspergilus sp. LC33; Chlorella Vulgularis; DPP; Heavymetals; Methylene blue and Methylene green

http://dx.doi.org/10.19045/bspab.2020.90256