Functionalized silver nanoparticles as chemosensor for pH, Hg2+ and Fe3+ in aqueous medium

Bothra, Shilpa; Solanki, Jignasa N.; Sahoo, Suban K.

doi:10.1016/j.snb.2013.07.111

Cited by 114 publications

(37 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These phenomena are known as Mie blue shift, 35 in which particle diameter was decreasing and the distance between nanoparticles become closer during Hg(II) reduction by AgNPs, thus increasing their frequencies and at the same time shortening their wavelength. The same phenomena on AgNPs are also reported in previous research, [36][37][38] while those of AuNPs were dominated by red shift. 10,12 The ability of AgNPs to quantitatively detect Hg(II) was demonstrated by adding different concentrations of Hg(II) to AgNPs and calculating the change in SPR band intensity monitored by UV-visible spectrophotometry.…”

Section: Colorimetric Detection Of Mercury and Analytical Performancesupporting

confidence: 87%

“…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%

See 1 more Smart Citation

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

et al. 2017

View full text Add to dashboard Cite

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%.

show abstract

Section: Colorimetric Detection Of Mercury and Analytical Performancesupporting

confidence: 87%

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

View full text Add to dashboard Cite

show abstract

“…253,254,255,256,257,258,259,260 Detection of toxic ions using Ag nanoparticles is based on the functionalization of Nanoparticles with specific molecules that can bind to target ions. 261 Furthermore, biomolecules such as DNA (having thymine nucleotides), glutathione and cysteine have also been used as capping molecules to selectively bind with specific ions. Hg 2+ ions could be removed from water by amalgamation with metals and by complexation with head groups of the monolayer surface present on nanoparticles, therefore the detection sensitivity depends on the density of functional groups on the surface.…”

Section: Figmentioning

confidence: 99%

Inorganic engineered nanoparticles in drinking water treatment: a critical review

Simeonidis

Mourdikoudis

Kaprara

et al. 2016

Environ. Sci.: Water Res. Technol.

177

103

View full text Add to dashboard Cite

The interest of the scientific community in the potential applications of inorganic engineered nanoparticles for drinking water treatment is continuously increasing. This review paper is an up to date summary of recent research progress in this field with respect to the removal of heavy metals, microorganisms and organic pollutants. In parallel, a critical investigation on the applicability of developed nanomaterials is attempted, considering the economic viability, environmental safety and sustainability of proposed processes. On this, the manuscript discusses issues like the stability and fate of engineered nanoparticles during and after use whereas it suggests a generalized approach for excluding reliable and comparable results by laboratory experiments. AbstractThis review summarizes recent research in the field of inorganic engineered nanoparticles development with direct or potential interest for drinking water treatment. The incorporation of engineered nanoparticles in drinking water treatment technologies against the removal of heavy metals, microorganisms and organic pollutants appears as a very dynamic branch of nanotechnology. Nanoparticles owe their potential on the high specific surface area and surface reactivity compared to conventional bulk materials. Depending on the mechanism of uptake, nanoparticles can be designed to establish high selectivity against specific pollutants and provide the required efficiency for application. However, despite early encouraging results, nanoparticles meet a number of limitations to get promoted and become part of large-scale water treatment plants. The most important is their availability in the required large quantities and their efficiency to fulfil the strict regulations for drinking water consumption and environmental safety. Both deal with the particles preparation cost and the cost of treatment operation with respect to the increase of supplied water price for the consumers. Under this view, this work attempts to evaluate reported studies according to their possibility to meet reliable requirements of water technology and also suggests an experimental approach to allow validation of tested nanoparticles.

show abstract

“…We therefore developed a noble approach for calculating their association constants using Benesi–Hildebrand plots (Eq. ) (Bothra et al ., ) as shown in Figure for the concentrations of Tet‐A.4HCl (Figure A), Tet‐B.4HCl (Figure B), or [32]ane‐N 8 .8HCl (Figure C) up to CCC value, and the data are listed in Table . A proposed H‐bonding interaction involving the surface‐adsorbed citrate anions and the added MCPAC cations is projected in Scheme .…”

Section: Resultsmentioning

confidence: 99%

Recognition of silver nanoparticles surface‐adsorbed citrate anions by macrocyclic polyammonium cations: a spectrophotometric approach to study aggregation kinetics and evaluation of association constant

Choudhury

Purkayastha

Debnath

et al. 2016

J of Molecular Recognition

View full text Add to dashboard Cite

In this report, we have studied the recognition of citrate anions adsorbed on the surface of silver nanoparticles (cit-Ag-NPs), by macrocyclic polyammonium cations (MCPACs): Me6 [14]ane-N4 H8 (4+) (Tet-A/Tet-B cations) and [32]ane-N8 H16 (8+) , which are well reputed anion recognizers and are treated as to mimic of biological polyamines. The study was monitored on ultraviolet-visible spectroscopy by performing a titration of the aqueous dispersion of the cit-Ag-NPs by the aqueous solution of MCPACs. The ultraviolet-visible time-scan plots over the reduction of the absorption band of surface plasmon resonance of cit-Ag-NPs at 390 nm are well fitted with fourth-order polynomial equation and are employed to determine the initial aggregation rate constants. It has been stated that the aggregation is the result in electrostatic attraction followed by H-bond formation between the surface-adsorbed citrate anions and added MCPACs. The atomic force microscopy results have evidenced aggregation of cit-Ag-NPs in presence of MCPACs. The evaluated H-bonded association constant (Kasso ) using Benesi-Hildebrand method reveals that [32]ane-N8 H16 (8+) cations form stronger association complex, as expected, with the citrate anions than the Me6 [14]ane-N4 H8 (4+) cations. The study would thus provide the insight of molecular interactions involved in nanoparticle surface-adsorbed anions with biological polyamines. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

Functionalized silver nanoparticles as chemosensor for pH, Hg2+ and Fe3+ in aqueous medium

Cited by 114 publications

References 42 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

Inorganic engineered nanoparticles in drinking water treatment: a critical review

Recognition of silver nanoparticles surface‐adsorbed citrate anions by macrocyclic polyammonium cations: a spectrophotometric approach to study aggregation kinetics and evaluation of association constant

Contact Info

Product

Resources

About