Colorimetric Detection of Mercury Ions in Water with Capped Silver Nanoprisms.

Clicks: 333
ID: 73258
2019
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Ranked #132 of 812 articles by views in Materials (Basel, Switzerland)

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Abstract
The emission of mercury (II) from coal combustion and other industrial processes may have impacts on water resources, and the detection with sensitive but rapid testing methods is desirable for environmental screening. Towards this end, silver nanoprisms were chemically synthesized resulting in a blue reagent solution that transitioned towards red and yellow solutions when exposed to Hg ions at concentrations from 0.5 to 100 µM. A galvanic reduction of Hg onto the surfaces is apparently responsible for a change in nanoprism shape towards spherical nanoparticles, leading to the change in solution color. There were no interferences by other tested mono- and divalent metal cations in solution and pH had minimal influence in the range of 6.5 to 9.8. The silver nanoprism reagent provided a detection limit of approximately 1.5 µM (300 µg/L) for mercury (II), which compared reasonably well with other reported nanoparticle-based techniques. Further optimization may reduce this detection limit, but matrix effects in realistic water samples require further investigation and amelioration.
Reference Key
tanvir2019colorimetricmaterials Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Tanvir, Fouzia;Yaqub, Atif;Tanvir, Shazia;An, Ran;Anderson, William A;
Journal Materials (Basel, Switzerland)
Year 2019
DOI
E1533
URL
https://www.mdpi.com/1996-1944/12/9/1533
Keywords
nanoparticles water quality amalgam nanoplates spectral blue shift

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