Biosynthesis of silver nanoparticles: A Novel Investigation of method and applications in Selective Detection of Cu+2 Ions

Abstract

Azadirachta indica (Neem) is a tree having dietary and pharmacological properties, and concoctions made from practically all parts of the plant, particularly the leaves. In the present study, chemical interaction between biogenic silver nanoparticles and a metal ion have been discussed as a Plasmon resonance sensing method for the recognition of divalent Cu⁺² in aqueous solutions. The study shows that green synthesized AgNPs using Azadirechta Indica (neem) leave extract as a reducing agent, was characterized by using UV-Vis Spectroscopy and TEM. The colour of the Ag-NPs colloidal solutions obtained was reddish-brown between 12 and 18 nm. The TEM analyses of these AgNPs shows spherical, triangular, and hexagonal shapes. Due to their divergent morphologies, these AgNPs can be used as Plasmon resonance sensors for detection of divalent Cu²⁺, primarily in aqueous solutions. Sensibility studies based on molar concentrations was also performed for the metal ion. The aim of the present investigation was to gain insight into the colloidal sensing characteristics for Cu+2 of crude aquatic extracts of neem plant leaves and synthetic AgNPs. This bio composite resulted to be good adsorbent material for Copper (II) ions.