Electrochemical detection of trace amount of arsenic(III) at glassy carbon electrode modified with cobalt oxide nanoparticles

Salimi, Abdollah; Mamkhezri, Hussein; Hallaj, Rahman; Soltanian, Saeid

doi:10.1016/j.snb.2007.08.017

Cited by 230 publications

(112 citation statements)

References 54 publications

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“…Studies using Co and cobalt oxides (CoO) decorated electrodes for biological and environmental sensing have been reported [28][29][30][31][32]. Electrodes decorated with CoO nanoparticles without CNTs for sensing properties have also been studied [33,34]. However, few studies using CNT-Co modified electrodes have been carried out [35][36][37][38][39], prepared mainly by chemical reduction processes rather than by electrodeposition.…”

Section: Introductionmentioning

confidence: 99%

Probing the electrochemical behaviour of SWCNT–cobalt nanoparticles and their electrocatalytic activities towards the detection of nitrite at acidic and physiological pH conditions

Adekunle

Pillay

Ozoemena

2010

Electrochimica Acta

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a b s t r a c tThe electrochemical decoration of edge plane pyrolytic graphite electrode (EPPGE) with cobalt and cobalt oxide nanoparticles integrated with and without single-walled carbon nanotubes (SWCNTs) is described. Successful modification of the electrodes was confirmed by field emission scanning electron microscopy (FESEM), AFM and EDX techniques. The electron transfer behaviour of the modified electrodes was investigated in [Fe(CN)6] 3−/4− redox probe using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) and discussed. The study showed that cobalt nanoparticles modified electrodes exhibit faster electron transfer behaviour than their oxides. The catalytic rate constant (K) obtained at the EPPGE-SWCNT-Co for nitrite at pH 7.4 and 3.0 are approximately the same (∼3 × 10 4 cm 3 mol −1 s −1 ) while the limits of detection (LoD = 3.3ı/m) are in the M order. From the adsorption stripping voltammetry, the electrochemical adsorption equilibrium constantˇwas estimated as (13.0 ± 0.1) × 10 3 M −1 at pH 7.4 and (56.7 ± 0.1) × 10 3 M −1 at pH 3.0 while the free energy change ( G • ) due to the adsorption was estimated as −6.36 and −10.00 kJ mol −1 for nitrite at pH 7.4 and 3.0, respectively.

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Section: Introductionmentioning

confidence: 99%

Probing the electrochemical behaviour of SWCNT–cobalt nanoparticles and their electrocatalytic activities towards the detection of nitrite at acidic and physiological pH conditions

Adekunle

Pillay

Ozoemena

2010

Electrochimica Acta

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“…20 Among other methods are silver electrode, 21 Platinum (Pt) nanoparticle modified GCE, 22 Pt nanotube, 23 Pt modified BDD electrode, 24 Iridium-implanted BDD electrode, 25 arsenite oxidase biosensor, 26 screen printed ring disk carbon electrode, 27 and cobalt oxide nanoparticle modified GCE. 28 Most studies using these modified electrodes adopted anodic stripping voltammetry (ASV) for more effective and sensitive detection of arsenic. Although these modified electrodes show the successful determination of As(III) with a low limit of detection (LOD) via anodic stripping voltammetry, their sensitivities remain relatively low level and they suffers from the problem of copper interference.…”

mentioning

confidence: 99%

Anodic Stripping Voltammetric Detection of Arsenic(III) at Platinum-Iron(III) Nanoparticle Modified Carbon Nanotube on Glassy Carbon Electrode

Shin¹,

Hong²

2010

Bulletin of the Korean Chemical Society

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The electrochemical detection of As(III) was investigated on a platinum-iron(III) nanoparticles modified multiwalled carbon nanotube on glassy carbon electrode(nanoPt-Fe(III)/MWCNT/GCE) in 0.1 M H2SO4. The nanoPt-Fe(III)/ MWCNT/GCE was prepared via continuous potential cycling in the range from -0.8 to 0.7 V (vs. Ag/AgCl), in 0.1 M KCl solution containing 0.9 mM K2PtCl6 and 0.6 mM FeCl3. The Pt nanoparticles and iron oxide were co-electrodeposited into the MWCNT-Nafion composite film on GCE. The resulting electrode was examined by cyclic voltammetry (CV), scanning electron microscopy (SEM), and anodic stripping voltammetry (ASV). For the detection of As(III), the nanoPt-Fe(III)/MWCNT/GCE showed low detection limit of 10 nM (0.75 ppb) and high sensitivity of 4.76 µAµM -1 , while the World Health Organization's guideline value of arsenic for drinking water is 10 ppb. It is worth to note that the electrode presents no interference from copper ion, which is the most serious interfering species in arsenic detection.

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“…Analysis of As (III) on the Au spikes was carried out via Square Wave Anodic Stripping Voltammetry (SWASV) in 0.5 M HNO 3 . SWASV responses of the three gold spike electrodes with different concentrations of As (III) are shown in Figures 2a-2c.…”

Section: Resultsmentioning

confidence: 99%

“…All the solutions were prepared with Milli-Q (18 M cm −1 ) deionized water. As (III) stock solution was prepared by dissolving As 2 O 3 in concentrated NaOH, and the pH was adjusted to 3.0 with concentrated HNO 3 and then diluted with Milli-Q water. Solutions of other concentrations were prepared from this stock solution.…”

Section: Methodsmentioning

confidence: 99%

“…1 Contamination of groundwater by arsenic has been reported in more than 20 countries 2 with a recommended 10 ppb upper limit for drinking water set by the World Health Organization (WHO). 3 Arsenite (As (III)) is considered the most toxic form in natural water, while Arsenate (As (V)) is 50 times less poisonous and generally the most stable in oxidising conditions. [4][5][6][7] Anthropogenic emissions of arsenic from industrial effluents, combustion of fossil fuels, or mining of As containing ores are a significant source, as are natural origins such as As bearing minerals.…”

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confidence: 99%

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The Effect of Electrodeposition Parameters and Morphology on the Performance of Au Nanostructures for the Detection of As (III)

Ren

Jones

Chen

et al. 2017

J. Electrochem. Soc.

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A series of Au nanospikes and dendrites were electrodeposited with either an inorganic (Pb 2+ ) or organic (cysteine) growth directing agent for different times to obtain varied morphology. These structures were compared with gold nanoparticles of three different shapes (Octahedral, Cubic and Rhombic Dodecahedral) for detection of As (III) by Square Wave Anodic Stripping Voltammetry (SWASV). The sensitivity and limit of detection (LOD) was dependent on the surface crystallographic orientations and the morphology, with superior sensitivity confirmed with a maximum amount of Au (111) facets on the surface for the nanoparticles. XRD studies suggested that the shape directing influence of Pb 2+ is lost on the gold nanospikes at higher deposition time, and that the size of the (111) terraces on the polycrystalline surfaces decreased, which led to a loss of performance. For gold dendrites, as the cysteine maintained shape directing behavior through hierarchical dendritic branching, deposition time did not affect the sensitivity. The study confirms that electrodeposition parameters or nanoparticle synthesis methods for Au surfaces in arsenic sensing needs to be carefully controlled, to either maximize the (111) facets, or minimize the steps on a polycrystalline Au surface, and that inorganic and organic shape directing agents will have differing effects. Arsenic (As) is a naturally occurring toxic substance associated with adverse health effects, including mutagenicity and carcinogenity.1 Contamination of groundwater by arsenic has been reported in more than 20 countries 2 with a recommended 10 ppb upper limit for drinking water set by the World Health Organization (WHO).3 Arsenite (As (III)) is considered the most toxic form in natural water, while Arsenate (As (V)) is 50 times less poisonous and generally the most stable in oxidising conditions. 4-7 Anthropogenic emissions of arsenic from industrial effluents, combustion of fossil fuels, or mining of As containing ores are a significant source, as are natural origins such as As bearing minerals. 8,9 A variety of conventional laboratory analytical techniques are available for arsenic detection including atomic absorption/fluorescence spectrometry, surface enhanced Raman scattering (SERS), high performance liquid/gas chromatography and inductively coupled plasma mass spectrometry (ICPMS).10 However, there remains a need for detection methods that are economically competitive, due to prevalent As in remote regions of the developing world, and such methods must be accurate and convenient for technicians to conduct on-site analysis. Electrochemical methods are useful to this end, 11 and a large range of materials have been developed for electrochemical detection of arsenic. Gold-based materials have been studied extensively for electrochemical detection of Arsenic (As), with the technique of Anodic Stripping Voltammetry (ASV) offering excellent sensitivity and limit of detection.12 Nanostructured Au electrodes have been shown to have a lower limit of detection (LOD) and h...

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Electrochemical detection of trace amount of arsenic(III) at glassy carbon electrode modified with cobalt oxide nanoparticles

Cited by 230 publications

References 54 publications

Probing the electrochemical behaviour of SWCNT–cobalt nanoparticles and their electrocatalytic activities towards the detection of nitrite at acidic and physiological pH conditions

Probing the electrochemical behaviour of SWCNT–cobalt nanoparticles and their electrocatalytic activities towards the detection of nitrite at acidic and physiological pH conditions

Anodic Stripping Voltammetric Detection of Arsenic(III) at Platinum-Iron(III) Nanoparticle Modified Carbon Nanotube on Glassy Carbon Electrode

The Effect of Electrodeposition Parameters and Morphology on the Performance of Au Nanostructures for the Detection of As (III)

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