Functionalized silver nanoparticles probe for visual colorimetric sensing of mercury

Jeevika, Alagan; Shankaran, Dhesingh Ravi

doi:10.1016/j.materresbull.2016.05.029

Cited by 96 publications

(42 citation statements)

References 37 publications

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“…The control sample (Glu-AgNPs) did not show any change in absorbance during the course of interaction very fast at high concentration of mercury (i.e., C1 lM). In contrast, at low concentration, i.e., B600 nM, it is relatively slow and the analysis takes at least 60 s. This analysis time achieved in our study was relatively very short compared to the previously reported studies where the time taken was almost 1 h (Farhadi et al 2012;Jeevika and Shankaran 2016;Lin et al 2010). The high reaction rate was attributed to the presence of glucose capping, which is anionic in nature and facilitated the electrostatic attraction and etching of cationic mercury ions in the aqueous medium.…”

Section: Mechanism Of Hg 21 Sensingmentioning

confidence: 48%

“…in aqueous sample. The sensitivity of the probes was found to be comparable (Jeevika and Shankaran 2016) or one order better (Ma et al 2016;Rithesh Raj et al 2016) compared to the recently developed various nanoanalytical methods. Although the sensitivity was observed to be relatively less compared to the electrochemical sensor, this relies on sensor matrices consisting of sensitive and costly DNA/imprinted polymer/ other complex nanohybrid structures (Zhou et al 2016;Bahrami et al 2015), which limit their field deployability.…”

Section: Mechanism Of Hg 21 Sensingmentioning

confidence: 84%

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Dual mechanism-based sensing of mercury using unmodified, heteroepitaxially synthesized silver nanoparticles

et al. 2017

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Mercury and its compounds are widely distributed in the environment and have a significant negative impact on human health. In this paper, we report the development of a rapid and facile method for the detection of mercury ions (Hg 2? ) using heteroepitaxially synthesized unmodified silver nanoparticle-based smart probes using UV-Vis spectrophotometer and also through the naked eye by means of a paper-based sensor strip. The silver nanoparticles were prepared by heteroepitaxial growth method using gold seed nanoparticle of *2.4 nm size as the template. The silver is grown on the seed particles by reducing the silver-ammonia complex using glucose, which resulted in Glu-AgNPs having an average size of 14.65 ± 3.53 nm. The sensing of mercury ions was carried out in aqueous solution and the reaction response was monitored by UV-Vis spectrophotometer. The interaction of Hg 2? with Glu-AgNPs resulted in a significant drop in the absorbance at 402 nm along with a prominent color change (from bright yellow to colorless) and wavelength shift (blue shift). The limit of detection (LOD) of this assay was found to be 100 nM (i.e., 20 ppb) with a good linearity in the concentration range of 100-10 mM. To further ease the detection process and make it field deployable, we attempted to develop a paper-based sensor strip by immobilizing Glu-AgNPs on a paper strip. Upon interaction with mercury solution of varying concentrations, the decoloration of the spots could be observed easily through naked eyes, with the limit of detection under sub-optical conditions being 1 lM.

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Section: Mechanism Of Hg 21 Sensingmentioning

confidence: 48%

Section: Mechanism Of Hg 21 Sensingmentioning

confidence: 84%

Dual mechanism-based sensing of mercury using unmodified, heteroepitaxially synthesized silver nanoparticles

et al. 2017

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“…This way, detection of very low environmentally relevant Hg contents is possible. Several sensing systems have been already reported based on the interaction between AgNPs and Hg(II) ions [23][24][25][26][27][28][29][30][31][32]; however, detailed study of Hg behavior in the presence of another competitive oxidant is rarely performed and discussed. A dual functional sensor for determination of Hg and H 2 O 2 has been developed based on a similar approach: addition of H 2 O 2 to a mixture of AgNPs and Hg(II) ions [33].…”

Section: Introductionmentioning

confidence: 99%

Application of Starch-Stabilized Silver Nanoparticles as a Colorimetric Sensor for Mercury(II) in 0.005 mol/L Nitric Acid

Vasileva

Alexandrova

Karadjova

2017

Journal of Chemistry

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, and Ni 2+ ) do not interfere under the same conditions, due to the absence of oxidative activity of these ions, which guarantees the high selectivity of the proposed optical sensor towards Hg 2+ . The limits of detection and quantification were found to be 0.9 g L −1 and 2.7 g L −1 , respectively, and relative standard deviations varied in the range 9-12% for Hg content from 0.9 to 12.5 g L −1 and 5-9% for Hg levels from 25 to 500 g L −1 . The method was validated by analysis of CRM Estuarine Water BCR505. A possible mechanism of interaction between AgNPs and Hg 2+ for both concentration ranges was proposed on the basis of UV-Vis, TEM, and SAED analyses.

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“…Several conventional detection methods are used for detecting Hg 2+ ions such as inductive coupled plasma mass spectrometry, atomic absorption spectroscopy, fluorescent sensors and electrochemical methods [59][60][61][62]. However, these techniques face limitations due to their cost, time-consuming sample preparation and complex experimental procedures [63]. Alternatively, simpler methods such as colorimetric assays have gained immense attention due to their simple and rapid principle of Hg 2+ detection [63,64].…”

Section: Biosensing Of Hg 2+ Ionsmentioning

confidence: 99%

“…However, these techniques face limitations due to their cost, time-consuming sample preparation and complex experimental procedures [63]. Alternatively, simpler methods such as colorimetric assays have gained immense attention due to their simple and rapid principle of Hg 2+ detection [63,64]. Amongst these, silver and gold nanosensor based colorimetric assays are considered promising owing to their unique physicochemical properties.…”

Section: Biosensing Of Hg 2+ Ionsmentioning

confidence: 99%

Green synthesis of silver nanoparticles using cauliflower waste and their multifaceted applications in photocatalytic degradation of methylene blue dye and Hg2+ biosensing

Kadam¹,

et al. 2020

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Green synthesis of silver nanoparticles (AgNPs) using plant extracts has emerged as a viable environment-friendly method. The aim of the study was to biosynthesize AgNPs using cauliflower (Brassica oleracea var. botrytis) waste extract and further test their potential applications in photocatalytic degradation of methylene blue (MB) dye and Hg 2+ biosensing. Optimum extract concentration, AgNO 3 concentration, pH and temperature required for biosynthesis of stable AgNPs were determined by UV-visible spectroscopy. FT-IR, XRD, SEM, TEM, SAED, XPS and BET analysis were performed for characterizing AgNPs. MB dye degradation using AgNPs was determined by analyzing the intensity of dye absorption maxima at 664 nm. Specificity and sensitivity of biosynthesized AgNPs for Hg 2+ ions were studied for assessing their biosensing abilities. Optimum conditions needed for biosynthesis of stable AgNPs were observed to be 3 ml extract, 0.5 mM AgNO 3 , pH 8.5 and microwave-assisted heating at 600 W for 5 min. FT-IR analysis showed that the extract contained necessary functional groups that facilitated biosynthesis of AgNPs. XRD, SEM, TEM, SAED, XPS results confirmed the formation of AgNPs. BET analysis showed that AgNPs had an average size of 35.08 nm and surface area of 19.22 m 2 /g. Maximum MB dye degradation percentage of 97.57% was obtained at 150 min without any significant silver leaching thereby, signifying notable photocatalytic property of AgNPs. Biosensing studies showed that AgNPs were specifically able to detect up to 0.1 mg/l Hg 2+ ions. In summary, cauliflower waste served as a useful source of reducing agents for biosynthesizing AgNPs with promising environmental applications.

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Functionalized silver nanoparticles probe for visual colorimetric sensing of mercury

Cited by 96 publications

References 37 publications

Dual mechanism-based sensing of mercury using unmodified, heteroepitaxially synthesized silver nanoparticles

Dual mechanism-based sensing of mercury using unmodified, heteroepitaxially synthesized silver nanoparticles

Application of Starch-Stabilized Silver Nanoparticles as a Colorimetric Sensor for Mercury(II) in 0.005 mol/L Nitric Acid

Green synthesis of silver nanoparticles using cauliflower waste and their multifaceted applications in photocatalytic degradation of methylene blue dye and Hg2+ biosensing

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