Green Nanotechnology: Synthesis of Silver Nanoparticles Using Aqueous Leaf Extract of Swertia chirayita

Abstract

In the present study the synthesis of silver nanoparticles mediated by aqueous leaf extracts of Swertia chirayita is reported. Nanoparticles are particles having diameters below 100 nm. The nanoparticles formed were characterized using Uv-Vis spectrophotometer, scanning electron microscope, Ft-IR and light scattering & Zeta potential analysis. A Surface Plasmon Resonance (SPR) peak was observed at 450 nm in Uv-Vis analysis. SEM analysis showed that the particles were spherical and cuboidal in shape and had diameter from 85-120 nm. The FT-IR analysis spectra peak were observed at 3,610.74 cm -1 , 3,089.96 cm -1 , 2,125.56 cm -1 , 166.50 cm -1 and 864.11 cm -1 , which corresponds to the presence of capping agents such as primary and secondary amines, hydroxyl compounds, flavonoids, alcoholic and phenolic compounds. The results of light scattering analysis also confirmed the formation of nanoscale particles. The zeta potential analysis showed a peak of -25 mV which demarcates the stability of the synthesized nanoparticles.

Swertia chirata extract mediated synthesis of iron oxide nanoparticles and its use as corrosion inhibitor for stainless steel 316 L in Ringer’s solution

“…23 NPs. The shift in the peak wavelengths corresponding to phytochemicals present in the FTIR spectra of NPs was due to the interaction of phytochemicals with NPs surface and the movement of functional groups from S. chirata extracts toward NPs surface in order to provide stability as well as to act as capping agent [33,34].…”

Synthesis and characterization of Cuscuta reflexa (Roxb.) aqueous extract mediated silver nanoparticles

“…FTIR spectroscopy analysis was carried out by IPRresting-21 (Shimadzu Corp., Kyoto, Japan). 6,12 Results and discussion…”

“…have been used for eco friendly and green technology. 5,6 Cuscuta reflexa Roxb. Belongs to family Cuscutaceae a division of Convolvulaceae commonly known as Dodder or Akash bel is a parasitic climber plant without leaves has been used as traditional medicine in Ayurveda for treatment of eye and heart and other diseases for a long time.…”

Augmented anticancer effect and antibacterial activity of silver nanoparticles synthesized by using Taxus wallichiana leaf extract

“…Large numbers of secondary metabolites are present in plant extracts that act as reducing agents and play an important role in capping and stabilizing of Ag NPs ( Shah et al, 2019 ). Peaonia emodi , Althaea rosea , Swertia chirata , Bergenia stracheyi and Solanum xanthocarpum are some important medicinal plants with secondary metabolites having pharmaceutical importance ( Shah et al, 2019 ; Korbekandi et al, 2016 ; Kumar & Sinha, 2017 ; Rashid et al, 2019 ; Amin et al, 2012 ). Ag NPs were synthesized from different parts of these plant species such as root, leaf, flower and fruit having immense pharmaceutical significance ( Korbekandi et al, 2016 ; Kumar & Sinha, 2017 ; Rashid et al, 2019 ; Amin et al, 2012 ).…”