Facile colorimetric detection of Hg2+ based on anti-aggregation of silver nanoparticles

Duan, Junling; Yin, Huiming; Wei, Ranran; Wang, Weiwei

doi:10.1016/j.bios.2014.02.007

Cited by 123 publications

(32 citation statements)

References 41 publications

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“…This revised mechanism advances the previously proposed mechanisms. 37,[56][57][58] However, some mercury colorimetric detection methods using different capping agents or functionalized AgNPs could produce a colored mixture after the addition of Hg ions, indicating a different reaction mechanism, 59 as also observed in mercury colorimetric detection using AuNPs. 60 In these reactions, instead of direct reaction between Hg(II) ions with Ag(0) of AgNPs (or with Au(0) of AuNPs), the interaction between Hg ions with capping agents to form the larger size of nanoparticles that lead to aggregation is more dominant.…”

Section: Colorimetric Detection Of Mercury and Analytical Performancementioning

confidence: 99%

Colorimetric Detection of Mercury(II) Ion in Aqueous Solution Using Silver Nanoparticles

et al. 2017

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Novel green-chemistry synthesis of silver nanoparticles (AgNPs) is introduced as a low-cost, rapid and easy-to-use analytical method for mercury ion detection. Aqueous fruit extract of water apple (Syzygium aqueum) was used for the first time as bioreductant to synthesize stable AgNPs. The prepared AgNPs have a yellowish-brown color with a surface plasmon resonance peak at 420 nm. The addition of Hg(II) ions then changes the AgNPs color to colorless. The color change was in proportion to the concentration of Hg(II) ions. The presence of other metal ions in the system was also evaluated. The proposed method shows good selectivity and sensitivity towards Hg(II) ions. Using UV-visible spectrophotometry, the detection limit of the developed method was 8.5 × 10 -7 M. The proposed method has been successfully applied for determination of Hg(II) ions in tap and lake water samples with precision better than 5%.

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Section: Colorimetric Detection Of Mercury and Analytical Performancementioning

confidence: 99%

Colorimetric Detection of Mercury(II) Ion in Aqueous Solution Using Silver Nanoparticles

et al. 2017

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“…sensing (Liu et al 2011;Wang et al 2010). For example, Duan et al (2014) designed anti-aggregation-based colorimetric sensor for the detection of Hg 2? ions, which requires the addition of 6-thioguanine during the assay.…”

Section: Introductionmentioning

confidence: 99%

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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“…Colorimetric sensors for detection of Hg 2+ using AuNPs [21] and AgNPs [22] as sensor probes have been reported most frequently. The color change of the sensor probe in the presence of Hg 2+ was due to the change of the particle size, such as crystal growth [23] or aggregation/antiaggregation mechanisms [22,24]. In addition, fluorescence sensors based metal nanoclusters including AuNCs [18] and AgNCs [25] for the detection of Hg 2+ have also been reported.…”

Section: Introductionmentioning

confidence: 99%

“…There have been several reports utilizing nanomaterials as optical chemical sensors for selective detection of Hg 2+ , for instance using gold nanoparticles (AuNPs) [16], silver nanoparticles (AgNPs) [17], gold nanoclusters (AuNCs) [18,19], and silver nanoclusters (AgNCs) [20]. Colorimetric sensors for detection of Hg 2+ using AuNPs [21] and AgNPs [22] as sensor probes have been reported most frequently. The color change of the sensor probe in the presence of Hg 2+ was due to the change of the particle size, such as crystal growth [23] or aggregation/antiaggregation mechanisms [22,24].…”

Section: Introductionmentioning

confidence: 99%

Silver ion modulated CdS quantum dots for highly selective detection of trace Hg2+

Uppa

Kulchat

Ngamdee

et al. 2016

Journal of Luminescence

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Facile colorimetric detection of Hg2+ based on anti-aggregation of silver nanoparticles

Cited by 123 publications

References 41 publications

Colorimetric Detection of Mercury(II) Ion in Aqueous Solution Using Silver Nanoparticles

Colorimetric Detection of Mercury(II) Ion in Aqueous Solution Using Silver Nanoparticles

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

Silver ion modulated CdS quantum dots for highly selective detection of trace Hg2+

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