Voltammetric determination of nitrate in water samples at copper modified bismuth bulk electrode

Pan, Dawei; Lü, Wenjing; Zhang, Haiyun; Zhang, Li; Zhuang, Jianmei

doi:10.1080/03067319.2012.690149

Cited by 15 publications

(5 citation statements)

References 41 publications

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“…On the other hand, the current response of the electrode increased apparently when the nitrate was removed (curve E). This behavior is due to the increase of vacant recognition sites number after removing the template, which enhances the (1) where I p is the peak current, n is the electron transfer number, A is the effective surface area (cm 2 ), D is the diffusion coefficient of K 3 [Fe(CN) 6 ] in the solution (0.650.10 −5 cm 2 s −1 ), C is the concentration of K 3 [Fe(CN) 6 ] (mol/cm 3 ), and v is the scan rate (mV s −1 ) [48,49]. Based on (1), the effective surface areas of GCE, GCE/Cu-NPs, GCE/Cu-NPs/PANI, NIP-GCE/Cu-NPs/PANI, and IIP-GCE/Cu-NPs/PANI were calculated to be 0.035, 0.027, 0.04, 0.03, and 0.14 cm 2 , respectively.…”

Section: Electrochemical Characterization Of Various Modifiedmentioning

confidence: 99%

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Ion-Imprinted Electrochemical Sensor Based on Copper Nanoparticles-Polyaniline Matrix for Nitrate Detection

et al. 2019

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This study reports a new chemical sensor based on ion-imprinted polymer matrix using copper nanoparticles-polyaniline nanocomposite (IIP-Cu-NPs/PANI). This sensor was prepared by electropolymerization using aniline as a functional monomer and nitrate as template onto the copper nanoparticles-modified glassy carbon (GC) electrode surface. Both ion-imprinted (IIP) and nonimprinted (NIP) electrochemical sensor surfaces were evaluated using UV-Visible spectrometry and scanning electron microscopy (SEM). The electrochemical analysis was made via cyclic voltammetry (CV), linear sweep voltammetry (LSV), and impedance spectroscopy (IS). Throughout this study various analytical parameters, such as scan rate, pH value, concentration of monomer and template, and electropolymerization cycles, were optimized. Under the optimum conditions, the peaks current of nitrate was linear to its concentration in the range of 1μM-0.1M with a detection limit of 31μM and 5μM by EIS and LSV. The developed imprinted nitrate sensor was successfully applied for nitrate determination in different real water samples with acceptable recovery rates.

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Section: Electrochemical Characterization Of Various Modifiedmentioning

confidence: 99%

“…Nitrate is recognized as a significant contaminant in ground water because of its high environmental and human health risks. It is mostly present in aquatic ecosystems and food products [1][2][3]. The Environmental Protection Agency (EPA) recommended maximum limit for nitrate concentration in drinking water is 10 mg.L −1 [4,5].…”

Section: Introductionmentioning

confidence: 99%

Ion-Imprinted Electrochemical Sensor Based on Copper Nanoparticles-Polyaniline Matrix for Nitrate Detection

et al. 2019

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“…Different type of electrochemical sensors have been exploited in order to quantify nitrates, such as impedimetric [21]; [22], chronoamperometric [23][24][25][26][27], voltammetric [28]; [29][30][31][32][33] and also biosensors [34,35], [36]. As concern the enzymatic biosensors they permit to obtain very low Limit Of Detection (LOD) but the detection is very hard, expensive and time consuming (accurate pH control, many separation and incubation steps) [37].…”

Section: Introductionmentioning

confidence: 99%

Copper nanowire array as highly selective electrochemical sensor of nitrate ions in water

Patella

Russo

O’Riordan

et al. 2021

Talanta

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Contamination of water with nitrate ions is a significant problem that affects many areas of the world. The danger from nitrates is not so much their toxicity, rather low, as their transformation into nitrites and in particular into nitrosamines, substances considered to be a possible carcinogenic risk. For this reason, European legislation has set the maximum permissible concentration of nitrates in drinking water at 44 mg/l. Thus, it is clear that a continuous monitoring of nitrate ions is of high technological interest but it must be rapid, easy to perform and directly performable in situ. Electrochemical detection is certainly among the best techniques to obtain the above requirements. In particular, in this work we have developed a nanostructured sensor based on array of copper nanowires obtained with the simple method of galvanic deposition. The nanostructured sensors have a very short response time with a detection limit less than 10 M. Different interfering species were tested finding a negligible effect except for the chlorine ions. However, this problem has been solved by removing chlorine ions from the water through a simple precipitation of chloride compounds with low solubility. Nanostructured sensors were also used to analyze real water samples (rain, river and drinking water). In the case of drinking water, we have measured a concentration of nitrate ions very close to the that measured by conventional laboratory techniques.

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“…Moreover, Cu nanostructures possess high electrocatalytic activity to reduce NO 3 − in acidic electrolytes. 8 To date, different Cu nanostructure-modified electrodes, such as Cu-modified bismuth bulk electrodes, 9 Cu-modified borondoped diamonds, 10 Cu-modified platinum, 11 and Cu-modified pencil graphite, 8 have been used as electrochemical sensors for NO 3 − detection. Unfortunately, despite their many advantages, pure Cu nanostructure-based electrochemical sensors suffer from short-term chemical stability under catalytic reaction conditions.…”

Section: Introductionmentioning

confidence: 99%

Reduced Graphene Oxide/Copper Nanoparticle Composites as Electrochemical Sensor Materials for Nitrate Detection

Sookhakian

Teridi²,

Tong

et al. 2021

ACS Appl. Nano Mater.

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An efficient electrochemical nitrate (NO 3 − ) sensor consisting of a copper nanoparticle-reduced graphene oxide composite (Cu-rGO) with different rGO loadings was fabricated on indium tin oxide glass (ITO) by simple one-pot electrochemical deposition. The one-pot electrochemical deposition allows for the formation of Cu nanoparticles, reduction of graphene oxide, and decoration of Cu nanoparticles onto the rGO surface simultaneously. The as-electrochemically deposited Cu-rGO-modified ITO electrode was characterized using X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. The effect of rGO on the electrocatalytic activity of the Cu-rGO-modified ITO electrode toward NO 3 − reduction was investigated. The Cu-rGO composite with 0.5 mg mL −1 rGO loading shows better sensitivity, a lower detection limit, and a wide linear detection range. Finally, the Cu-rGO-modified ITO electrode with 0.5 mg mL −1 rGO loading was used to measure nitrate in real samples.

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Voltammetric determination of nitrate in water samples at copper modified bismuth bulk electrode

Cited by 15 publications

References 41 publications

Ion-Imprinted Electrochemical Sensor Based on Copper Nanoparticles-Polyaniline Matrix for Nitrate Detection

Ion-Imprinted Electrochemical Sensor Based on Copper Nanoparticles-Polyaniline Matrix for Nitrate Detection

Copper nanowire array as highly selective electrochemical sensor of nitrate ions in water

Reduced Graphene Oxide/Copper Nanoparticle Composites as Electrochemical Sensor Materials for Nitrate Detection

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