Silver particle-decorated carbon paste electrode based on ionic liquid for improved determination of nitrite

Menart, Eva; Jovanovski, Vasko; Hočevar, Samo B.

doi:10.1016/j.elecom.2015.01.017

Cited by 62 publications

(12 citation statements)

References 38 publications

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“…Based on this information, the detection limit obtained by the BiVO 4 /FTO photoelectrochemical sensor is low enough for determination of nitrite ions in drinking water, proving that this electrochemical device is suitable to be used in environmental analysis. The LOD value achieved by BiVO 4 /FTO photoelectrochemical sensor was lower than results obtained by the use of direct electrochemical sensor for nitrite published recently using carbon paste electrode decorated with silver particles (3.0 μmol L -1 ) [30], and zirconium-based porphyrin metal-organic framework (2.1 μmol L -1 ) [38]. A LOD of 0.4 μmol L -1 was observed in bare glassy carbon electrode using chronoamperometry but LOD increased to 300 μmol L -1 employing cyclic voltammetry [37].…”

Section: Resultscontrasting

confidence: 79%

“…However, according the World Health Organization (WHO) the maximum limit is 3 mg L -1 [22]. Several methods have been employed to determine nitrite, such as spectrophotometry [23], flow injection analysis [24], electrothermal molecular absorption spectrometry [25], colorimetric [26], fluorimetric [27], electrophoretic [28], chromatographic [29], and voltammetric [30]. Several electrochemical methods have been applied to nitrite analysis using direct oxidation on different electrode surfaces [21].…”

Section: Introductionmentioning

confidence: 99%

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New application for the BiVO4 photoanode: A photoelectroanalytical sensor for nitrite

Ribeiro

Moraes

Pereira

et al. 2015

Electrochemistry Communications

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Section: Resultscontrasting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

New application for the BiVO4 photoanode: A photoelectroanalytical sensor for nitrite

Ribeiro

Moraes

Pereira

et al. 2015

Electrochemistry Communications

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“…Nitrite, also formed by the conversion of nitrate in the saliva pose serious problem to human health [7,8]. It affects the normal functioning of the hemoglobin i. e., carrying oxygen in blood to other parts of the body, and at higher levels leads to methemoglobinemia commonly known as "blue baby syndrome" in babies [9][10][11]. When severe and untreated, causes brain damage and eventually results in death due to lack of oxygen [12].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Detection of Nitrite Using Glassy Carbon Electrode Modified with Silver Nanospheres (AgNS) Obtained by Green Synthesis Using Pre‐hydrolysed Liquor

Shivakumar¹,

Nagashree²,

Manjappa

et al. 2017

Electroanalysis

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Silver nanospheres (AgNS) with SPR band ∼417 nm was synthesized by Green synthesis, using a pre‐hydrolysed liquor (PHL) of Nilgiri wood without any pretreatment. The synthesis was carried out at room temperature and was complete within three hours. The reduction and stabilization of silver is brought about by hemicelluloses present in the pre‐hydrolysed liquor. Electrochemical oxidation of nitrite on glassy carbon electrode (GCE) modified with the AgNS in 0.1 M phosphate buffer solution (PBS) of pH 7.0 was found to occur at 0.86 V with respect to Ag/AgCl. Electrochemical sensing experiments with AgNS/GCE showed a linear range of detection between 0.1 to 8 μM, with detection limit of 0.031 μM and a sensitivity of 580 μA mM−1cm−2.

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“…However, when the sample is heated at 400˚C, this peak disappeared, which is in good agreement with the TG-DTA results. The absorption bands at about 1647 and 603 cm -1 are ascribed to the in-plane OH− group bending vibration and γ as Mo-S vibration, respectively [32]. The absorption bands at about 1647 and 603 cm -1 are ascribed to the in-plane OH− group bending vibration and γ as Mo-S vibration, respectively [32].…”

Section: Resultsmentioning

confidence: 99%

Improved photocatalytic activity of MoS₂ nanosheets decorated with SnO₂ nanoparticles

et al. 2015

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MoS 2 nanosheet decorated with SnO 2 mesoporous nanoparticles were successfully prepared by a facile two-step method. MoS 2 nanosheets were pre-synthesized using a solvothermal method and then decorated with the SnO 2 mesoporous nanoparticles through a wet chemical method. The nanocomposite was characterized with powder X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersed spectrometry (EDX), high-resolution transmission electron microscopy (HRTEM), thermal gravimetric and differential thermal analysis (TG-DTA), X-ray photoelectron spectroscopy (XPS) andElectrochemcial impedance spectroscopy (EIS). SnO 2 mesoporous nanoparticles can be selectively formed and attached to the peripheral surface of the layered MoS 2 , which was confirmed by FESEM and HRTEM. The photocatalytic activity of the nanocomposite was examined with Rhodamine B (RhB) in aqueous solution under UV light irradiation. The SnO 2 nanoparticles remarkably suppressed the electron-hole recombination effect on the MoS 2 photocatalyst and improved photocatalytic activity compared to pristine MoS 2 catalyst. A higher rate of pollutant degradation was accomplished within 50 min that was three times higher than that of the pristine MoS 2 catalyst. the presence of CTAB. Photocatalysis experiments prove that this heterogeneously structured composite has higher photocatalytic activity than pristine MoS 2 . Experimental ProcedureAll chemicals were analytical grade and used as received without further purification. Preparation of MoS 2 nanosheetsTo obtain the MoS 2 nanosheets, ammonium hepta molybdate tetrahydrate, citric acid, and thiophene (C 4 H 4 S) were used as the starting materials and sulfur source. 2.05 g of ammonium heptamolybdate tetra hydrate and 1.56 g of citric acid were dissolved in distilled water and magnetically stirred for 10 min at 90˚C on a hot plate to form a homogeneous solution. The white suspension was vigorously stirred and the pH was adjusted to 3.5 with the addition of ammonia water. Then, 3.15 g of thiophene in water was added dropwise to the solution and transferred to an autoclave, which was maintained at 200˚C for 10 h. After natural cooling of the reactor down to 25˚C, the resulting precipitates were collected through centrifugation, filtered, and washed three times with distilled water and acetone. The final precipitates were dried under vacuum at 130˚C for 2 h. Preparation of MoS 2 sheets decorated with SnO 2 nanoparticlesThe MoS 2 precipitates (20 mg) were exfoliated in distilled water (25 mL) and heated at 75˚C under magnetic stirring for 30 min to form a colloidal suspension. Then, SnCl 2 •2H 2 O (2.7 g) was dissolved in the colloidal solution. HCl (1.3 mL) and H 2 O (30 mL) were added drop-wise to the solution with continuous heating and stirring for 2 h. After several trials, we optimized the concentration of CTAB to 0.05 mmol. 0.05 mmol of CTAB was added to the suspension and stirred at 110˚C for 6 h. The final products were collected, filtered, and washed three times with acetone...

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Silver particle-decorated carbon paste electrode based on ionic liquid for improved determination of nitrite

Cited by 62 publications

References 38 publications

New application for the BiVO4 photoanode: A photoelectroanalytical sensor for nitrite

New application for the BiVO4 photoanode: A photoelectroanalytical sensor for nitrite

Electrochemical Detection of Nitrite Using Glassy Carbon Electrode Modified with Silver Nanospheres (AgNS) Obtained by Green Synthesis Using Pre‐hydrolysed Liquor

Improved photocatalytic activity of MoS₂ nanosheets decorated with SnO₂ nanoparticles

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Silver particle-decorated carbon paste electrode based on ionic liquid for improved determination of nitrite

Cited by 62 publications

References 38 publications

New application for the BiVO4 photoanode: A photoelectroanalytical sensor for nitrite

New application for the BiVO4 photoanode: A photoelectroanalytical sensor for nitrite

Electrochemical Detection of Nitrite Using Glassy Carbon Electrode Modified with Silver Nanospheres (AgNS) Obtained by Green Synthesis Using Pre‐hydrolysed Liquor

Improved photocatalytic activity of MoS2 nanosheets decorated with SnO2 nanoparticles

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Improved photocatalytic activity of MoS₂ nanosheets decorated with SnO₂ nanoparticles