SYNTHESIZED SILVER NANOPARTICLES USING PEEL EXTRACT OF PURPLE PASSION FRUIT AND APPLICATION IN THE DETECTION OF Pb2+, Zn2+ IONS IN AQUEOUS MEDIUM

Abstract

In this study, silver nanoparticles (AgNPs) were bio-synthesized using peel extract of purple passion fruit. Nanoparticles prepared with 1 mM AgNO₃ solution, using 3 mL of peel extract of purple passion fruit and at 60 °C. The formation of silver nanoparticles (AgNPs) was confirmed by UV-visible spectroscopic analysis and recorded the localized surface plasmon resonance (SPR) at 445 nm. The hydrodynamic diameter (61.7 nm) was measured using the dynamic light scattering technique, was performed with a nanoparticle analyzer. Moreover, these green synthesized AgNPs were found to exhibit good sensing properties towards Zn²⁺ and Pb²⁺ ions in aqueous medium with MDL_S = 0.035 mM, LOQ = 0.110 mM for Zn²⁺ and MDL_S = 0.043 mM, LOQ = 0.137 mM for Pb²⁺.

Keywords:  Silver nanoparticles, colorimetric sensors, ion Pb²⁺, ion Zn²⁺, extract of purple passion fruit.