Voltammetric determination of nitrite by using a multiwalled carbon nanotube paste electrode modified with chitosan-functionalized silver nanoparticles

Bibi, Sania; Zaman, Muhammad Iqbal; Niaz, Abdul; Rahim, Abdur; Nawaz, Mohsan; Arian, M.B.

doi:10.1007/s00604-019-3699-8

Cited by 27 publications

(16 citation statements)

References 40 publications

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“…As a result, the oxidation peak remarkably increased when the pH went up and reached the maximum value of 3.5. Similar behavior was previously observed for a multiwalled carbon nanotube paste electrode modified with chitosan-functionalized silver nanoparticles, where charged amino groups were responsible for the electrostatic attraction of nitrites [33,34]. On the other hand, it is well-known that nitrous acid is not stable in a strongly acidic electrolyte and can undergo the following disproportionation reaction (Eq.…”

Section: +supporting

confidence: 81%

Voltammetric sensor based on long alkyl chain tetraalkylammonium ionic liquids comprising ascorbate anion for determination of nitrite

et al. 2021

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An electrochemical sensor was fabricated utilizing ionic liquids possessing cations with long alkyl chains such as trimethyl octadecylammonium and behenyl trimethylammonium and ascorbate anion. The ionic liquids were drop-coated onto the electrode. Thin modifying layers were prepared. Cyclic voltammetric investigations revealed electrostatic interactions between the electrochemical probes and the modified surface, proving that a positive charge was established at the film surface. Hence, negatively charged species such as nitrite can be pre-concentrated on the surface of presented modified electrodes. The fabricated electrodes have been used as a voltammetric sensor for nitrite. Due to the electrostatic accumulation properties of long alkyl cation, the assay exhibits a remarkable improvement in the voltammetric response toward nitrite oxidation. The influence of pH on the electrode response was thoroughly investigated, and the mechanism of the electrode was established. The developed sensor showed a linear electrochemical response in the range 1.0–50 μM with a detection limit of 0.1 μM. The electrode revealed good storage stability, reproducibility, and anti-interference ability. The determination of nitrite performed in curing salts brought satisfactory results. Graphical abstract

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Section: +supporting

confidence: 81%

Voltammetric sensor based on long alkyl chain tetraalkylammonium ionic liquids comprising ascorbate anion for determination of nitrite

et al. 2021

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“…An interesting organic material studied for biosensors is chitosan, which is generally combined with metal-oxide nanoparticles or carbon nanotubes to increase its electrical properties for sensing applications [ 12 , 13 ]. Bibi et al [ 14 ] presented an MWCNT paste electrode modified with chitosan functionalized Ag-NPs while Li et al [ 15 ] reported a sensor based on chitosan, MWCNTs, and carbon nanoparticles (CNs), and Bai et al presented a multilayer film sensor based on H 7 P 2 Mo 17 V 1 O 62 (P 2 Mo 17 V)-carbon nanotubes and Pt-chitosan [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Nitrites Detection with Sensors Processed via Matrix-Assisted Pulsed Laser Evaporation

et al. 2022

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This work is focused on the application of a laser-based technique, i.e., matrix-assisted pulsed laser evaporation (MAPLE) for the development of electrochemical sensors aimed at the detection of nitrites in water. Commercial carbon-based screen-printed electrodes were modified by MAPLE via the application of a newly developed composite coating with different concentrations of carbon nanotubes (CNTs), chitosan, and iron (II) phthalocyanine (C32H16FeN8). The performance of the newly fabricated composite coatings was evaluated both by investigating the morphology and surface chemistry of the coating, and by determining the electro-catalytic oxidation properties of nitrite with bare and modified commercial carbon-based screen-printed electrode. It was found that the combined effect of CNTs with chitosan and C32H16FeN8 significantly improves the electrochemical response towards the oxidation of nitrite. In addition, the MAPLE modified screen-printed electrodes have a limit of detection of 0.12 µM, which make them extremely useful for the detection of nitrite traces.

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“…25 Various materials have been used as working electrodes in such devices: conductive glasses, 26 screen-printing, 27 glassy carbon, 28 ceramic carbon, 29 and carbon paste. 30,31 To increase the electroactive area and facilitate the kinetics of the electrode/solution interface, the electrodes have usually been modied with metal/ metal oxide nanoparticles, 32,33 carbon nanotubes, 34 graphene or GO, 18,35 or with hybrid silica-based materials. 36 For example, it was found that the addition of mesoporous silica (SBA-15) to a carbon paste electrode (CPE) can considerably enhance its sensitivity toward diethylstilbestrol, 37 by as much as immobilization of graphene on glassy carbon electrode.…”

Section: Introductionmentioning

confidence: 99%

Graphene oxide quantum dots immobilized on mesoporous silica: preparation, characterization and electroanalytical application

et al. 2020

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Voltammetric determination of nitrite by using a multiwalled carbon nanotube paste electrode modified with chitosan-functionalized silver nanoparticles

Cited by 27 publications

References 40 publications

Voltammetric sensor based on long alkyl chain tetraalkylammonium ionic liquids comprising ascorbate anion for determination of nitrite

Voltammetric sensor based on long alkyl chain tetraalkylammonium ionic liquids comprising ascorbate anion for determination of nitrite

Nitrites Detection with Sensors Processed via Matrix-Assisted Pulsed Laser Evaporation

Graphene oxide quantum dots immobilized on mesoporous silica: preparation, characterization and electroanalytical application

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