A selective polypyrrole-based sub-ppm impedimetric sensor for the detection of dissolved hydrogen sulfide and ammonia in a mixture

Yavarinasab, Adel; Janfaza, Sajjad; Tahmooressi, Hamed; Ghazi, Mahan; Tasnim, Nishat; Hoorfar, Mina

doi:10.1016/j.jhazmat.2021.125892

Cited by 24 publications

(18 citation statements)

References 37 publications

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“…The functionality of electrochemical sensors is based on resonant quantum tunnelling, which results in the variation of the resistance of the film while exposed to the analyte [ 12 ]. Containing a sensing element and a pair of electrodes, the electrons pass through the electrodes, and the reaction between the sensing layer and the analyte of interest increases the signal amplitude, which can be used for detecting the elements.…”

Section: Introductionmentioning

confidence: 99%

Potentiodynamic Electrochemical Impedance Spectroscopy of Polyaniline-Modified Pencil Graphite Electrodes for Selective Detection of Biochemical Trace Elements

Yavarinasab

Abedini²,

Tahmooressi

et al. 2021

Polymers

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In this study, we analyzed the application of potentiodynamic electrochemical impedance spectroscopy (PDEIS) for a selective in situ recognition of biological trace elements, i.e., Cr (III), Cu (II), and Fe (III). The electrochemical sensor was developed using the electropolymerization of aniline (Ani) on the surface of the homemade pencil graphite electrodes (PGE) using cyclic voltammetry (CV). The film was overoxidized to diminish the background current. A wide range of potential (V = −0.2 V to 1.0 V) was investigated to study the impedimetric and capacitive behaviour of the PAni/modified PGE. The impedance behaviors of the films were recorded at optimum potentials through electrochemical impedance spectroscopy (EIS) and scrutinized by means of an appropriate equivalent circuit at different voltages and at their corresponding oxidative potentials. The values of the equivalent circuit were used to identify features (charge transfer-resistant and double layer capacitance) that can selectivity distinguish different trace elements with the concentration of 10 μM. The PDEIS spectra represented the highest electron transfer for Cu (II) and Cr (III) in a broad potential range between +0.1 and +0.4 V while the potential V = +0.2 V showed the lowest charge transfer resistance for Fe (III). The results of this paper showed the capability of PDEIS as a complementary tool for conventional CV and EIS measurement for metallic ion sensing.

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Section: Introductionmentioning

confidence: 99%

Potentiodynamic Electrochemical Impedance Spectroscopy of Polyaniline-Modified Pencil Graphite Electrodes for Selective Detection of Biochemical Trace Elements

Yavarinasab

Abedini²,

Tahmooressi

et al. 2021

Polymers

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“…These chemicals are found at low level in the gut [50,51]. As illustrated in Figure 3a , the Nyquist plot formed the classic pattern of a depressed half circle at high frequencies followed by a strike line as a common faradaic probe for the analytes [52]. In short, the half circle is modelled by the double layer capacitance and/or constant phase element (formed by ion solvation) as well as the Schottky contact/charge transfer resistance, while the straight line is attributed to diffusion (Warburg impedance) [53].…”

Section: Resultsmentioning

confidence: 99%

“…The Bode (impedance and phase angle vs frequency) and Nyquist plots of the 3 sensors are represented in Figure 3d and Figure S1 in the frequency range of 10 5 to 10 2 Hz. Of note, the formation of additional stray capacitance at frequencies higher than 10 5 and the following discrepancy may result in a positive phase angle while no inductance appears to be generated (data not shown here), and therefore data collected only using frequencies below 10 5 were only analyzed [52]. The maximum value of phase angle (40 o ) occurred in the frequency range of 10 3 to 10 4 Hz, suggesting the frequency dispersion and the interfacial heterogeneity of the sensing layer [54].…”

Section: Reproducibility Stability and Selectivity Of The Chemiresist...mentioning

confidence: 99%

An impedance-based chemiresistor for the real-time detection of gut microbiota-generated short-chain fatty acids

Yavarinasab

Flibotte²,

Liu

et al. 2022

Preprint

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Short chain fatty acids (SCFAs) are key molecules produced by gut bacteria in the intestine, that are absorbed into the bloodstream and strongly influence human health. SCFA disruption and imbalances have been linked to many diseases; however, they are seldom used diagnostically as their detection requires extensive sample preparation and expensive equipment. In this work, an electrochemical sensor was developed to enable real time, quantitative measurement of SCFAs from complex samples in liquid phase without the need for extraction, evaporation, or destruction. An impedance based sensor for in vitro detection of acetic acid, propionic acid, and butyric acid (accounting for more than 95% of SCFAs in the intestine) was fabricated by the deposition of a ZnO and polyvinyl alcohol (PVA) on the surface of a microfabricated interdigitated gold electrode. The sensor was first exposed to a broad, physiologically relevant range of concentrations of SCFAs in isolation (0.5 to 20 mg/ml) and unlike previously published SCFA sensors that could detect only in gas form with the aid of evaporation, it was able to detect them directly in the liquid phase at room temperature. Electrochemical impedance spectroscopy analysis was then applied to the mixture of SCFAs prepared at different ratios and in complex media at concentrations ranging from 0.5 to 10 mg/ml, which showed the capability of the sensor to measure SCFAs in experimentally relevant mixture. The recorded faradaic responses were then used to train a fit to data model to utilize the sensor to screen human bacterial isolates and detect which species secrete SCFAs in vitro. This work will allow for the rapid and non destructive determination of the levels of SCFAs in complex biological samples, providing a miniaturized, highly stable, and highly sensitive sensor for real time monitoring applications.

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“…Therefore, the detection of low‐concentration ammonia is of great significance for health safety and ecological environment. As we know, the qualitative and quantitative detections can be achieved using gas chromatography‐mass spectrometry (GC‐MS), [5] colorimetry, [6] fluorescence sensor [7] and impedance spectroscopy [8] . However, these techniques require sample pretreatment, complicate operation and expensive instruments.…”

Section: Introductionmentioning

confidence: 99%

“…As we know, the qualitative and quantitative detections can be achieved using gas chromatography-mass spectrometry (GC-MS), [5] colorimetry, [6] fluorescence sensor [7] and impedance spectroscopy. [8] However, these techniques require sample pretreatment, complicate operation and expensive instruments. For comparison, the methods of low cost and simple operation are required for rapid analysis and real-time detection.…”

Section: Introductionmentioning

confidence: 99%

Constructing Netlike Nanosheets of ZnO/BiOCl with Heterojunction as Robust Material for Electrochemical Amine Detection

Ahmed

Zhao

Tian

et al. 2022

Chemistry A European J

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The electrochemical sensing is a potential method for detection of trace toxic substance. Herein, the heterojunction of netlike ZnO/BiOCl nanosheets was constructed for the enhanced electrochemical detection of ammonia. Cyclic voltammetry and linear sweep voltammetry were used to investigate the electrochemical performance. The results show that the ZnO/BiOCl‐modified electrode exhibits higher sensitivity towards ammonia compared with the ZnO and BiOCl‐based electrodes, which is ascribed to band structure and fast electron transfer. The high response of 11.8 μA mM−1 and a low detection limit (LOD) of 0.25 μM are achieved. In addition, the ZnO/BiOCl material exhibits high selectivity, repeatability and stability. The better linear relationship between concentration and current (R2=0.99) is significant for quantitative detection of ammonia, implying that netlike ZnO/BiOCl nanosheets can serve as electrochemical sensing platform for detecting toxic substance. This research provides a strategy for fabricating two‐dimensional netlike materials and regulating heterojunctions used for electrochemical application.

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A selective polypyrrole-based sub-ppm impedimetric sensor for the detection of dissolved hydrogen sulfide and ammonia in a mixture

Cited by 24 publications

References 37 publications

Potentiodynamic Electrochemical Impedance Spectroscopy of Polyaniline-Modified Pencil Graphite Electrodes for Selective Detection of Biochemical Trace Elements

Potentiodynamic Electrochemical Impedance Spectroscopy of Polyaniline-Modified Pencil Graphite Electrodes for Selective Detection of Biochemical Trace Elements

An impedance-based chemiresistor for the real-time detection of gut microbiota-generated short-chain fatty acids

Constructing Netlike Nanosheets of ZnO/BiOCl with Heterojunction as Robust Material for Electrochemical Amine Detection

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