Green synthesis of gold nanoparticles and its application for the trace level determination of painter's colic

Abstract

The green synthesis of metal nanoparticles is found to be more attractive in various disciplines, including analytical chemistry. The present study demonstrates a selective voltammetric determination of painter's colic (lead poisoning) using green synthesized gold nanoparticles (Au-NPs) modified glassy carbon electrode (GCE). The Au-NPs were synthesized by the reduction of chloroaurate ions with the fresh leaf extract of Justicia glauca. The formation of Au-NPs was confirmed by UV-visible spectroscopy using surface plasmon resonance. The average size of the synthesized Au-NPs is found to be 32.5 AE 0.25. A good cathodic response current was observed at the Au-NPs modified electrode, whereas the unmodified electrode does not show any response in the presence of Pb 2+ . With optimum condition, the Au-NPs modified electrode exhibits a good response towards Pb 2+ with a linear response range from 0.005 to 800 mM L À1 and the lowest detection limit of 0.07 nM L À1 . The fabricated sensor exhibits a high selectivity towards Pb 2+ in the presence of 100 fold concentrations of other metal ions. In addition, the proposed sensor also shows a good practicality towards Pb 2+ in river water samples. Fig. 2 Differential pulse voltammetric response of the bare (a) and Au-NPs (b) modified glassy carbon electrode response to 100 mM L À1 Pb 2+ in N 2 saturated pH 5 solution.This journal is

Synthesis of Gold Nanoparticles Using Leaf Extract of Ziziphus zizyphus and their Antimicrobial Activity

“…XRD analysis ( Figure 6 ) revealed four important peaks present in the (20–80) 2θ range. The diffraction peaks of 38.1° relates to (111), 44.5° relates to (200), 64.7° relates to (220), and 77.8° relates to (311) facets of the face center cubic (FCC) crystal lattice; these agree with reported values for similar gold nanostructures [ 69 ]. The reported peak values also matched the planes and face-centered cubic structures of AuNPs prepared by other green syntheses methods [ 22 , 70 , 71 , 72 ].…”

Antidiabetic Activity of Gold Nanoparticles Synthesized Using Wedelolactone in RIN-5F Cell Line

“…In the XRD pattern, five diffraction peaks at 2θ values of 38.43 • , 45.66 • , 65.80 • , and 78.76 • , corresponding to (111), (200), (220), and (311) crystal planes of the face-centered cubic crystal system, respectively, are seen. These results are in parallel with reported values for similar Au nanostructures [27]. EDX spectrum strongly supports the presence of gold ions.…”

A novel biofabrication of gold nanoparticles using Erythrina senegalensis leaf extract and their ameliorative effect on mycoplasmal pneumonia for treating lung infection in nursing care

“…The study of XRD confirmed the presence of four significant peaks between 20 and 80 2θ range (Figure 3). The peak of diffraction observed at 77.8°, 64.7°, 44.5°and 38.1°r elated to the facets 311, 220, 200 and 111, respectively, of the face-centered cubic (FCC) crystal lattice, which are compatible with the recorded values of different gold nanostructures [27]. The recorded peak values have matched Au NP's FCC cubic structures as well as planes that were developed by other approaches of green synthesis [28][29][30][31].…”