Cobalt nanoflowers: Synthesis, characterization and derivatization to cobalt hexacyanoferrate—Electrocatalytic oxidation and determination of sulfite and nitrite

Heli, H.; Eskandari, Issa; Sattarahmady, N.; Moosavi-Movahedi, Ali Akbar

doi:10.1016/j.electacta.2012.06.014

Cited by 52 publications

(16 citation statements)

References 39 publications

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“…The nitrite diffusion coefficients for the FCVE and TrX100/FCVE were calculated using the Cottrell Equation (1) based on a chronoamperogram recorded at E = 1.1 V in BRB (pH 3) containing 0.02 mM NO 2 − and the corresponding dependence I = f (t −1/2 ) (Figure 10). The value of the nitrite diffusion coefficient for the TrX100/FCVE was found as 2.24 × 10 −5 cm 2 s −1 , which accords with the same order of magnitude given at modified carbon paste electrode in other studies [11,49]. For the FCVE the value of D was found 1.52 × 10 −7 cm 2 s −1 .…”

Section: Effect Of Potential Scan Ratesupporting

confidence: 88%

Film Carbon Veil-Based Electrode Modified with Triton X-100 for Nitrite Determination

et al. 2020

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A film carbon veil-based electrode (FCVE) modified with non-ionic surfactant Triton X-100 (TrX100) has been developed for nitrite determination. A new simple and producible technique of hot lamination (heat sealing) has been used for the FCVE manufacturing. The paper presents the findings of investigating the FCVE and the TrX100/FCVE by using voltammetry, chronoamperometry, and scanning electron microscopy. Modification of the electrode with TrX100 improves the hydrophilic property of its surface, which results in a larger electrode active area and higher sensitivity. Optimal conditions for nitrite determination with the use of the TrX100/FCVE have been identified. The linear range (LR) and the limit of detection (LOD) are 0.1–100 μM and 0.01 μM, respectively. The relative standard deviation (RSD) does not exceed 2.3%. High selectivity of the sensor ensures its successful application for the analysis of real samples (sausage products and natural water). The obtained results accord well with the results of the standard spectrophotometric method.

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Section: Effect Of Potential Scan Ratesupporting

confidence: 88%

Film Carbon Veil-Based Electrode Modified with Triton X-100 for Nitrite Determination

et al. 2020

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“…Additionally, both of anodic and cathodic currents of the electrochemical couples were linearly dependent on the scan rate, signifying a dominant surface-confined process, which was in agreement with the previous literature [47]. As the peak current is related to the surface concentration of electroactive species, referring to CoHCF, the surface coverage of the electrode can therefore be estimated by the following equation [48]:…”

Section: Electrochemical Behaviors Of Nitrite and Hydrazinesupporting

confidence: 56%

An electrochemical sensor for hydrazine and nitrite based on graphene–cobalt hexacyanoferrate nanocomposite: Toward environment and food detection

Luo

Pan

et al. 2015

Journal of Electroanalytical Chemistry

102

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“…Besides long analysis time, the conventional titrimetric method also suffers from poor precision. In the pursuit of suitable alternative, a number of methods have been established for the detection of SO 3 2− such as ion chromatography 5 , FIA/gas diffusion 6 , spectrophotometric detection [7][8][9][10][11][12] , flow injection analysis (FIA) 13 , colorimetric titration 14 , chemiluminescence 15,16 , and electrochemical estimation [17][18][19] . Among these methods, electrochemical technique is attractive due to high selectivity, sensitivity, wide concentration range, low-cost, simplicity and so on.…”

Section: −mentioning

confidence: 99%

Structural and morphological tuning of Cu-based metal oxide nanoparticles by a facile chemical method and highly electrochemical sensing of sulphite

Sudha

Murugadoss

Thangamuthu

2021

Sci Rep

104

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A facile one-step chemical method is introduced for the successful synthesis of Cu2O, CuO and CuNa2(OH)4 crystal structures and their electrochemical properties were also investigated. X-ray diffraction studies revealed that these copper-based oxide nanoparticles display different crystal structures such as cubic (Cu2O), monoclinic (CuO) and orthorhombic [CuNa2(OH)4]. The microstructural information of nanoparticles was investigated by transmission electron microscopy. It shows attractive morphologies of different orientation such as rod like structure, nanobeads and well-aligned uniform nanorod for Cu2O, CuO and CuNa2(OH)4, respectively. Electrochemical sensing of sulphite (SO32−) on these three copper-based oxide modified electrodes was investigated. Among the three different crystal structures, CuO shows promising electrocatalytic activity towards oxidation of sulphite. A linear variation in peak current was obtained for SO32− oxidation from 0.2 to 15 mM under the optimum experimental condition. The sensitivity and detection limit were in the order of 48.5 µA cm−2 mM−1 and 1.8 µM, respectively. Finally, practical utility of CuO modified electrode was demonstrated for the estimation of sulphite in commercial wine samples.

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Cobalt nanoflowers: Synthesis, characterization and derivatization to cobalt hexacyanoferrate—Electrocatalytic oxidation and determination of sulfite and nitrite

Cited by 52 publications

References 39 publications

Film Carbon Veil-Based Electrode Modified with Triton X-100 for Nitrite Determination

Film Carbon Veil-Based Electrode Modified with Triton X-100 for Nitrite Determination

An electrochemical sensor for hydrazine and nitrite based on graphene–cobalt hexacyanoferrate nanocomposite: Toward environment and food detection

Structural and morphological tuning of Cu-based metal oxide nanoparticles by a facile chemical method and highly electrochemical sensing of sulphite

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