Thermodynamic and Charge Transport Studies for the Detection of Heavy Metal Ions in Electrochemical Sensors Using a Composite Film of Aniline, N-phenylglycine and Graphene Oxide

Dutta, Kusumita; Panda, Siddhartha

doi:10.1149/2.1151914jes

Cited by 15 publications

(11 citation statements)

References 53 publications

(84 reference statements)

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“…The diameter of semicircle part at higher frequencies corresponds to the charge transfer resistance (Rct), and the characteristic linear part at lower frequencies relates to the diffusion process. [44][45][46][47][48][49] As shown in Figure 1b the modified electrode has a smaller semi-circle which indicates lower resistance and consequent faster electron transfer as compared to that of bare GCE. The parameters obtained from EIS are listed in the Table I.…”

Section: Electrochemical Characterization Of Compound (8)/gce-the Cyc...mentioning

confidence: 97%

Simultaneous Ultrasensitive Detection of Toxic Heavy Metal Ions Using bis(imidazo[4,5-f][1, 10]phenanthroline) Appended bis-triazolo Calix[4] Arene (8)/Glassy Carbon Electrode

Sultan

Shah

Khan

et al. 2019

J. Electrochem. Soc.

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A highly sensitive and selective electrochemical sensor has been developed and investigated for multiple metal ions detection. The GCE was modified with the synthesized multifunctional calix[4]arene and the anodic stripping voltammetry was used for the simultaneous electrochemical analysis of Cd 2+ , Pb 2+ and Hg 2+ ions. The analysis conditions were optimized with respect to modifier's loaded concentration, accumulation time, potential, supporting electrolyte and pH of the media. The bis(imidazo[4,5-f][1, 10]phenanthroline) appended bis-triazolo Calix[4] arene modified glassy carbon electrode (compound (8)/GCE) exhibited fast electron transfer rate for the stripping signals of Cd 2+ , Pb 2+ and Hg 2+ ions as evidenced from square wave anodic stripping voltammograms. The linear calibration curves were used for the evaluation of the detection limits with values of 0.037, 0.015 and 0.025 nM for Cd 2+ , Pb 2+ and Hg 2+ respectively. The modified electrode showed the qualities of repeatability, reproducibility and selectivity for Cd 2+ , Pb 2+ and Hg 2+ in the presence of common competitive metal ions. The study was extended to real water samples by sensing the traces of given metal cations in locally collected drinking water samples. The results reveal that the compound (8)/GCE is an extremely sensitive, cheap and portable electrochemical platform for the detection of multiple heavy metal ions in the drinking water reservoirs and seawater.

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Section: Electrochemical Characterization Of Compound (8)/gce-the Cyc...mentioning

confidence: 97%

Simultaneous Ultrasensitive Detection of Toxic Heavy Metal Ions Using bis(imidazo[4,5-f][1, 10]phenanthroline) Appended bis-triazolo Calix[4] Arene (8)/Glassy Carbon Electrode

Sultan

Shah

Khan

et al. 2019

J. Electrochem. Soc.

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“…Another glamorous application is to monitor surrounding environmental factors in real-time to deal with the abnormal situations and/or the emergencies. 86 At present, wearable graphene sensors have been widely investigated in monitoring the level of hazardous gases in-doors, detecting waves, monitoring the humidity and temperatures in specific areas (Fig. 7), etc.…”

Section: Wearable Graphene Sensors For Environment Monitoringmentioning

confidence: 99%

Review—Wearable Graphene Devices for Sensing

Xie

Chen

Shen

et al. 2020

J. Electrochem. Soc.

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Graphene has become one of the most readily used materials in wearable sensing technology due to its unique properties of lightweight, ultrahigh carrier mobility, good environmental stability and robust mechanical flexibility. However, efforts based on graphene have still rarely been made for fabricating device-level wearable sensors. In addition, few review articles related to these aspects have been reported. In this work, recent research progress of wearable graphene sensors for healthcare, motion detections, and environment monitoring, is briefly reviewed. Also, the challenges and perspectives for the future generation of wearable graphene sensors are also highlighted. This work provides a comprehensive understanding on the present research situations and challenges for wearable graphene devices for sensing.

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“…3 Cadmium contamination raises from fuel combustion, fertilizers, industrial wastes. [4][5][6][7][8] Selectivity is an important performance parameter for an electrochemical sensor. 9,10 To characterize the selectivity, i.e.…”

mentioning

confidence: 99%

Estimation of thermodynamics properties as a measure of the extent of interference in a conducting polymer based electrochemical aqueous ion sensor

Dutta,

Panda

2024

Int J Sci Rep

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Background: Interference of other ions towards the target analyte in an electrochemical sensor is typically estimated utilizing the peak reduction (PR) technique and the selectivity coefficient technique, both of which have limitations. In our earlier works, a scale of interference was developed using the barrier width (BW) technique based on Simmon’s model utilizing a conducting polymer-based sensor for the detection of Cd2+ by square wave voltammetry (SWV). Also, a new scale of interference was generated with higher resolution by incorporating the BW technique along with adsorption isotherms and the PR technique. Methods: The present work takes the investigation further at the electrode-electrolyte interface to explain the interference effect using thermodynamic parameters such as the partition coefficient, enthalpy and reorganization energy. The length of the reaction site for Cd2+ can also measure interference effect. In this work, SWV for Cd2+ detection in presence of interfering species at different temperatures were conducted, -ΔGad values were extracted and all the thermodynamic parameters were evaluated. The novelty of this work lies in incorporation of these thermodynamic parameters along with BW values (d) to explain the interference phenomena. Results: The variation of the thermodynamic properties for Cd2+ in presence of interfering species were examined. Correlation coefficients were developed from the thermodynamic parameters and the d values to explain the extent of interference. Conclusions: This study can provide information on the thermodynamic properties which can be predicted from BW technique. The correlation coefficients would help obtain an estimate of the interference with the need of lesser number of experiments.

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Thermodynamic and Charge Transport Studies for the Detection of Heavy Metal Ions in Electrochemical Sensors Using a Composite Film of Aniline, N-phenylglycine and Graphene Oxide

Cited by 15 publications

References 53 publications

Simultaneous Ultrasensitive Detection of Toxic Heavy Metal Ions Using bis(imidazo[4,5-f][1, 10]phenanthroline) Appended bis-triazolo Calix[4] Arene (8)/Glassy Carbon Electrode

Simultaneous Ultrasensitive Detection of Toxic Heavy Metal Ions Using bis(imidazo[4,5-f][1, 10]phenanthroline) Appended bis-triazolo Calix[4] Arene (8)/Glassy Carbon Electrode

Review—Wearable Graphene Devices for Sensing

Estimation of thermodynamics properties as a measure of the extent of interference in a conducting polymer based electrochemical aqueous ion sensor

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