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Xanthan Gum-Mediated Silver Nanoparticles for Ultrasensitive Electrochemical Detection of Hg 2+ Ions from Water.
- Source :
- Catalysts (2073-4344); Jan2023, Vol. 13 Issue 1, p208, 18p
- Publication Year :
- 2023
-
Abstract
- An environmentally safe, efficient, and economical microwave-assisted technique was selected for the production of silver nanoparticles (AgNPs). To prepare uniformly disseminated AgNPs, xanthan gum (XG) was utilized as both a reducing and capping agent. UV–Vis spectroscopy was used to characterize the formed XG-AgNPs, with the absorption band regulated at 414 nm under optimized parameters. Atomic force microscopy was used to reveal the size and shape of XG-AgNPs. The interactions between the XG capping agent and AgNPs observed using Fourier transform infrared spectroscopy. The XG-AgNPs were placed in between glassy carbon electrode and Nafion<superscript>®</superscript> surfaces and then deployed as sensors for voltammetric evaluation of mercury ions (Hg<superscript>2+</superscript>) using square-wave voltammetry as an analytical mode. Required Nafion<superscript>®</superscript> quantities, electrode behavior, electrolyte characteristics, pH, initial potentials, accumulation potentials, and accumulation durations were all comprehensively investigated. In addition, an electrochemical mechanism for the oxidation of Hg<superscript>2+</superscript> was postulated. With an exceptional limit of detection of 0.18 ppb and an R<superscript>2</superscript> value of 0.981, the sensors' measured linear response range was 0.0007–0.002 µM Hg<superscript>2+</superscript>. Hg<superscript>2+</superscript> evaluations were ultimately unaffected by the presence of many coexisting metal ions (Cd<superscript>2+</superscript>, Pb<superscript>2+</superscript>, Cr<subscript>2</subscript>O<subscript>4</subscript>, Co<superscript>2+</superscript>,Cu<superscript>2+</superscript>, CuSO<subscript>4</subscript>). Spiked water samples were tested using the described approach, with Hg<superscript>2+</superscript> recoveries ranging from 97% to 100%. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20734344
- Volume :
- 13
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Catalysts (2073-4344)
- Publication Type :
- Academic Journal
- Accession number :
- 161437981
- Full Text :
- https://doi.org/10.3390/catal13010208