Investigation of a new electrochemical cyanide sensor based on Ag nanoparticles embedded in a three-dimensional sol–gel

Taheri, Aboozar; Noroozifar, Meissam; Khorasani-Motlagh, Mozhgan

doi:10.1016/j.jelechem.2009.01.003

Cited by 77 publications

(38 citation statements)

References 34 publications

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“…They are usually obtained by chemical or electrochemical reduction of appropriate salt performed in the presence of stabilizing components, e.g. poly(vinylpyrrolidone) [28,29], poly(N-isopropylacrylamide) [30], mercaptopropyltrimethoxysilane sol-gel network [31], polyethylene imine [32], and polyaniline [33]. The nanosilver dispersions have found applica-tion in an electrocatalytic reduction of hydrogen peroxide [34] and nitrite anion [35].…”

Section: Introductionmentioning

confidence: 99%

Dopamine Sensor Based on a Composite of Silver Nanoparticles Implemented in the Electroactive Matrix of Calixarenes

et al. 2011

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A sensitive electrochemical sensor based on a composite containing silver nanoparticles and a redox active thiacalixarene with catechol fragments in the substituents at the lower rim has been developed and used for dopamine detection. The electrochemical investigation of thiacalixarene in homogeneous solution and on the electrode interface showed the reversible character of the redox conversion of catechol fragments and its involvement in the chemical reduction of silver which resulted in formation of uniform nanoparticles of 4-6 nm in diameter. The use of such a material for electrode modification made it possible to record a high amplitude cathodic signal at À700 mV that was proportional to the dopamine concentration within 1 nM-1 mM. (limit of detection 0.5 nM).

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Section: Introductionmentioning

confidence: 99%

Dopamine Sensor Based on a Composite of Silver Nanoparticles Implemented in the Electroactive Matrix of Calixarenes

et al. 2011

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“…The LOD of the present method (20 nmol dm -3 , i.e., 0.5 ppb) is about two orders of magnitude lower than that by ISE and solution spectrophotometry, methods which have been adopted as official methods for CN -(LODs about 1 to several μmol dm -3 ). 45,46 This performance is comparable to that of ESI-MS/MS (LOD, 40 nmol dm -3 ), 44 chemiluminescence (LOD, 0.1 ppb), 47 surface-enhanced Raman spectroscopy (LOD, about 1 ppb), 48 CE (LOD, 10 nmol dm -3 ), 49 gas chromatography with electron capture detector (GC-ECD) (LOD, 0.5 ppb), 50 IC with pulse amperometric detection (IC-PAD) (LOD, 1 ppb), 51 voltammetry (LOD, 14 nmol dm -3 ) 52 and amperometry (LOD, 0.05 to 0.12 ppb). 53 Full details on the performance of the afore-mentioned methods are available.…”

Section: ·3 Measurement Of Ternary Complex Of Cyanide With Metal-parmentioning

confidence: 99%

Electrospray Ionization Mass Spectrometry for the Quantification of Inorganic Cations and Anions

Hotta

Tsunoda

2015

ANAL. SCI.

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“…and Ca 2? or anions such as PO 4 3-, SO 4 2-, NO 3 -, Cl -and CO 3 2-were added and analyzed. In general, most of these cations and anions exist as electrolytes in real human saliva samples.…”

Section: Surface Characterisationmentioning

confidence: 99%

“…It is a normal constituent in human saliva, urine, and serum, which is introduced through vegetables, including cabbage and cauliflower and as a drug for thyroid treatment and arterial hypertension [4][5][6][7][8][9]. The concentration of SCN -depends upon the nature of food habits and is between 0.5 and 2 mM with an average level of 1 mM [10].…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of bimetallic Ag@Cu nanorods modified electrode for enhanced electrochemical sensing of thiocyanate ions

2015

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The thiocyanate (SCN -) level in human saliva, serum, and blood has been considered as a biomarker for analyzing the practice of cigarette smokers. Here, we have developed a highly sensitive and selective electrochemical sensor for SCN -in phosphate buffer using an Ag@Cu bimetallic nanorods (NRDs) modified glassy carbon electrode (GCE). The bimetallic Ag@Cu NRDs were grown on the GCE surface by a simple seedmediated growth method. Initially, Ag seeds were deposited on the Nafion coated GCE. The deposited Ag seeds in turn accelerate the growth of bimetallic Ag@Cu NRDs in the presence of cetyltrimethyl ammonium bromide, which acts as a soft template for the onedimensional growth of NRDs. The synthesised NRDs were characterized by scanning electron microscopy and energy dispersive X-ray spectroscopy measurements. The Ag@Cu NRDs modified electrode shows an excellent response towards the electrochemical oxidation of SCN -. Cyclic voltammetry was used to study the linear correlation of SCN -oxidation between 1 and 10 mM, and, subsequently, 10 nM was achieved as the detection limit with a signal to noise ratio (S/N = 3) for Ag@Cu bimetallic NRDs modified GCE. This unique sensor shows a high selectivity towards trace amounts of SCN -in the presence of various interfering cations and anions. It satisfactorily recognized the generated SCN -in a real-time application such as in human saliva. Finally, the fingerprint of SCN -existence in the saliva samples of cigarette smokers and non-smokers were differentiated in a short span of time with ease.

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Investigation of a new electrochemical cyanide sensor based on Ag nanoparticles embedded in a three-dimensional sol–gel

Cited by 77 publications

References 34 publications

Dopamine Sensor Based on a Composite of Silver Nanoparticles Implemented in the Electroactive Matrix of Calixarenes

Dopamine Sensor Based on a Composite of Silver Nanoparticles Implemented in the Electroactive Matrix of Calixarenes

Electrospray Ionization Mass Spectrometry for the Quantification of Inorganic Cations and Anions

Synergistic effect of bimetallic Ag@Cu nanorods modified electrode for enhanced electrochemical sensing of thiocyanate ions

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