Gum acacia-based silver nanoparticles as a highly selective and sensitive dual nanosensor for Hg(ii) and fluorescence turn-off sensor for S²⁻ and malachite green detection

Abstract

Gum acacia-stabilized silver nanoparticles for the detection of Hg(ii), S2− and malachite green.

Rapid Detection of Mercury Ions Using Sustainable Natural Gum-Based Silver Nanoparticles

“…However, after treating the prepared sensor with the sample of mercury ions, the XRD spectrum pattern (blue line) recorded the absence of AgNPs@AG peaks with the appearance of new interesting sharp peaks at locations 25.79 • , 32.51 • , 56.26 • , and 66.11 • , which returned to the formation of the Ag−Hg status. These measured values agree with the previous work's results [30].…”

“…Therefore, in this process, almond gum plays a significant role in reducing, stabilizing, and being a good electron donor in preparation for each AgNP and Ag−Hg state. Furthermore, the electron transmission from almond gum to Ag + gains support from the suggested synthetic procedure without additional reducing agents used during the AgNPs fabrication [30]. The fabrication of AgNPs@AG and the formation of Ag-Hg were confirmed and supported by UV−Vis measurement, XRD study, XPs analysis, and an increase in the nanoparticles' sizes for both silver nanoparticles and the amalgamate that appeared by the FESEM and HR-TEM images analysis.…”

“…An easy and short procedure was conducted to investigate the efficiency of Ag-NPs@AG as a rapid colorimetric sensor to detect mercury ions in an aqueous solution. A group of 5 mL glass vials was arranged and filled with 3 mL of different concentrations of mercury ions (10,20,30,40,50,60,70,80,90, and 100 mg/L). It was shown that the yellow color of AgNPs@AG disappeared rapidly after each addition of silver nanoparticles to the mercury solution, indicating that AG@NPs worked as an efficient probe against mercury ions in an aqueous solution.…”

Captivating nano sensors for mercury detection: a promising approach for monitoring of toxic mercury in environmental samples

“…The linear detection ranges span from 3 nmol L −1 to 13 mmol L −1 for Hg(II), with a corresponding LOD of 2.1 nmol L −1 for Hg(II). 65 In a colloidal solution of silver nanoparticles (AgNPs), shining a portable laser pointer pen (635 nm) creates a bright red Tyndall effect (TE). Huang et al utilized this scattering signal of AgNPs' TE for highly sensitive visual detection of Hg(II) ions at the point of need.…”

“…Fig.9FTIR spectrum of gum acacia, gum acacia@Ag and gum acacia@Ag-Hg(II) (reproduced from ref 65. with permission from Royal Society of Chemistry, Copyright @ 2020).…”