Silver Nanoparticles: Green Synthesis, Characterization, and Their Usage in Determination of Mercury Contamination in Seafoods

Abstract

We demonstrate that silver nanoparticles undergo an interaction with Hg 2+ found in traces. The PEG-PVP-stabilized Ag nanoparticles were successfully synthesized via a reduction approach and characterized with surface plasmon resonance UV/Vis spectroscopy. By utilizing the redox reaction between Ag nanoparticles and Hg 2+ , and the resulted decrease in UV/Vis signal, we develop a colorimetric method for detection of Hg 2+ ion. A linear and inversely proportional relationship was found between the absorbance intensity of the Ag nanoparticles and the concentration of Hg 2+ ion over the range from 10 ppm to 1 ppm at absorption on 411 nm. The detection limit for Hg 2+ ions in homogeneous aqueous solutions is estimated to be 1 ppm. This system shows excellent selectivity for Hg 2+ . The results found have potential implications in the development of new colorimetric sensors for easy and selective detection and monitoring of mercuric ions in aqueous solutions. The proposed method was successfully applied to quantify the amount of mercury in seafood.

Green Synthesis of Silver Nanoparticles Using Panax Ginseng Root Extract for the Detection of Hg2+

“…To overcome these limitations and to avoid complicated instrumentation, several methods based on colorimetry and probes of noble metals have been developed for the easy detection of Hg 2+ . (18,20,21,29,30) In this study, the one-pot, simple, and rapid green synthesis of highly stable and colloidal AgNPs has been achieved using Panax ginseng root extract as a reducing and capping agent. The synthesized AgNPs were investigated for their structural and functional properties and used as a material for the detection of Hg 2+ based on the dissolution of AgNPs and the formation of Ag-Hg amalgam.…”

Comparative Study of Ag Nanostructures: Molecular Simulations, Electrochemical Behavior, and Antibacterial Effect

“…In order to provide the full evidence with respect to the AgNPs presence, Figures 2(e) and 2(f) show the UV-Vis analysis corresponding to the CO and Ih samples, respectively. In these spectra, typical bands around 400 nm are observed in both cases [12,41]. Specifically, for AgNPs-NaBH 4 and AgNPs-EG samples, bands located at 419 and 388 nm were observed, respectively.…”

Silver nanoparticles as a solid sorbent in ultrasound-assisted dispersive micro solid-phase extraction for the atomic absorption spectrometric determination of mercury in water samples

“…30,33 Ahmed et al observed the sensitivity of AgNPs toward Hg 2+ which was identied by UV-vis absorption spectra. 34 Since the standard electrode potential of Ag + /Ag is 0.80 V and Hg 2+ /Hg is 0.85 V, it is expected that a redox reaction can occur between zerovalent silver and Hg 2+ .…”