A graphene-based chemical sensor for hydrogen sulfide measurement in water

Yavarinasab, Adel; Tahmooressi, Hamed; Hoorfar, Mina; Janfaza, Sajjad; Montazeri, Mahyar Mohaghegh; Tasnim, Nishat; Farahani, Ali Davoodabadi; Kadota, Paul; Markin, Paul; Dalili, Arash; Taatizadeh, Erfan

doi:10.1109/sensors43011.2019.8956803

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…The results showed the high dependency of the Nyquist plot (impedance values) on the bias voltage, suggesting the necessity to choose the working potential with maximum differentiation between the results. The Nyquist plot of faradaic solutions formed the classic pattern of the depressed semicircle at high frequencies with a straight line as a tail of the circle at low frequencies [ 34 ]. Thus, the small diameter of the depressed half circle contributed to the low resistance of the film against the flow of the electrons.…”

Section: Resultsmentioning

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: Resultsmentioning

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

Self Cite

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“…Various AM sensors have struggled to resolve this issue by integrating a porous gas membrane and basic internal solution with a redox moderator (i.e., ferrocyanide) which accepts electrons from H 2 S/HS − and is restored at the electrode interface to generate a quantifiable current response (down to 10 nM) [ 73 ]. Adel’s group [ 74 ] developed a chemiresistive sensor-based on GR attached with a nonconducting polymer, polymethyl methacrylate for H 2 S sensing in a liquid phase. The sensor can unswervingly detect H 2 S in solution without evaporation.…”

Section: Gr-based Ec Sensors For Bioanalytes Detectionmentioning

confidence: 99%

The Roadmap of Graphene-Based Sensors: Electrochemical Methods for Bioanalytical Applications

et al. 2022

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Graphene (GR) has engrossed immense research attention as an emerging carbon material owing to its enthralling electrochemical (EC) and physical properties. Herein, we debate the role of GR-based nanomaterials (NMs) in refining EC sensing performance toward bioanalytes detection. Following the introduction, we briefly discuss the GR fabrication, properties, application as electrode materials, the principle of EC sensing system, and the importance of bioanalytes detection in early disease diagnosis. Along with the brief description of GR-derivatives, simulation, and doping, classification of GR-based EC sensors such as cancer biomarkers, neurotransmitters, DNA sensors, immunosensors, and various other bioanalytes detection is provided. The working mechanism of topical GR-based EC sensors, advantages, and real-time analysis of these along with details of analytical merit of figures for EC sensors are discussed. Last, we have concluded the review by providing some suggestions to overcome the existing downsides of GR-based sensors and future outlook. The advancement of electrochemistry, nanotechnology, and point-of-care (POC) devices could offer the next generation of precise, sensitive, and reliable EC sensors.

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Air-Stable Highly Sensitive Self-Assembled P3HT/GQD Nanocomposite-Based Organic Thin-Film Transistor for Multiparametric HS Real-Time Detection at Room Temperature

2023

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A graphene-based chemical sensor for hydrogen sulfide measurement in water

Cited by 3 publications

References 11 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

The Roadmap of Graphene-Based Sensors: Electrochemical Methods for Bioanalytical Applications

Air-Stable Highly Sensitive Self-Assembled P3HT/GQD Nanocomposite-Based Organic Thin-Film Transistor for Multiparametric HS Real-Time Detection at Room Temperature

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