A flexible and disposable electrochemical sensor for the evaluation of arsenic levels: A new and efficient method for the batch fabrication of chemically modified electrodes

Zhao, Guo; Wang, Xiaochan; Liu, Gang; Cao, Yueqiang; Liu, Ning; Thuy, Nguyen Thi Dieu; Zhang, Litao; Yu, Meng

doi:10.1016/j.aca.2021.339413

Cited by 23 publications

(3 citation statements)

References 63 publications

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“…The curve at each scanning rate shows a pair of well-defined reversible redox peaks and the peak current increases with the scanning rate from 522 μA at 50 mV s –1 to 2679 μA at 500 mV·s –1 . To quantify the relationship, peak currents at the corresponding scanning rates are extracted, subtracted by the baseline, and plotted in Figure b. It shows the peak current of LIG has a positive linear relationship with v 1/2 , indicating the feature of the diffusion control system .…”

Section: Resultsmentioning

confidence: 99%

Nonmodified Laser-Induced Graphene Sensors for Lead-Ion Detection

Liu

Wang

et al. 2023

ACS Appl. Nano Mater.

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Electrochemical detection, especially anodic stripping voltammetry (ASV), has been widely used in the detection of heavy metal ions because of its high sensitivity, low detection limit, as well as on-site and real-time detection capability. However, ASV detection typically relies on modified sensors, which complicates the preparation process and introduces contaminants to the tested solutions. Herein, we developed a preconcentration relaxation strategy to improve detection performances of bare sensors without modification. Specifically, in the preconcentration step of ASV, the solution stirring did not run throughout the whole preconcentration process but stopped before the end of preconcentration, remaining as a relaxation period for metal ions fully depositing. To verify this strategy, we fabricated porous laser-induced graphene sensors without modification to detect lead ions. With the preconcentration strategy, the detection linear range was widened from 30−100 to 1−100 μg•L −1 , and the sensitivity was increased from 0.1362 μA•(μg•L −1 ) −1 to 0.1772 μA•(μg•L −1 ) −1 in 1−5 μg•L −1 and 0.7081 μA•(μg•L −1 ) −1 in 10−100 μg•L −1 . Moreover, the limit of detection reached 0.5 μg•L −1 (S/N = 3). This work sheds light on the accurate and effective detection of heavy metal ions.

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Section: Resultsmentioning

confidence: 99%

Nonmodified Laser-Induced Graphene Sensors for Lead-Ion Detection

Liu

Wang

et al. 2023

ACS Appl. Nano Mater.

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“…An interesting and recent approach is chemically modified electrodes (CMEs), which are mainly used for selective and sensitive electrochemical determination. They can mediate the electrode reaction through a significant reduction in over-potential, independent of pH, with a fast and stable reaction in redox response [ 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 ]. In 1979, an electrochemical approach called the chemical modification of the carbon paste electrode surface was proposed [ 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

A New Electrochemical Sensor for the Detection of Ketoconazole Using Carbon Paste Electrode Modified with Sheaf-like Ce-BTC MOF Nanostructure and Ionic Liquid

2023

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An ultrasensitive and selective voltammetric sensor with an ultratrace-level detection limit is introduced for ketoconazole (KTC) determination in real samples using a modified carbon paste electrode with a sheaf-like Ce-BTC MOF nanostructure and ionic liquid. The as-synthesized nanostructure was characterized by several techniques, including energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and field emission scanning electron microscopy (FE-SEM). The electrocatalytic performance of the developed electrode was observed by cyclic voltammetry (CV), differential pulse voltammetry (DPV), linear sweep voltammetry (LSV), and chronoamperometry. The limit of detection (LOD) of the developed sensor for KTC is 0.04 μM, and the response was found to be in the dynamic concentration range of 0.1–110.0 μM in a phosphate buffer solution. The proposed electrode exhibits acceptable electrocatalytic activity for KTC oxidation with a high sensitivity of 0.1342 μA·μM−1. The ability of the fabricated sensor to monitor KTC in real aqueous samples is demonstrated using standard addition data.

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“…18,19 Compared to techniques mentionedabove, anodic stripping voltammetry (ASV 20 ), a current electroanalytical technique, [21][22][23][24] can be used for rapid and simultaneous detection of both Cd (II) and Pb (II) with the advantages of easy operation, economy, satisfactory sensitivity and selectivity. For instance, Xiao et al 25 prepared a pyridine-Au/pyridine composites for Hg (II) by ASV; Zhao et al 26 fabricated a flexible AuNPs-LIG electrochemical sensor for As (III) using ASV; Liu et al 27 developed a S-doped porous Co 3 O 4 composites for Hg (II) via ASV.…”

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confidence: 99%

A Tablet-Operated Portable Wireless Sensing Platform for Field Simultaneous Rapid Detection of both Cd (II) and Pb (II) Using CaAl-Layered Double Hydroxide Nanocomposite Modified Integrated Screen-Printed Three-Electrode

Zhang,

Huang,

et al. 2024

J. Electrochem. Soc.

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It’s essential to exploit a portable wireless integrated sensing platform for field-simultaneous, on-site detection of heavy metal ions pollution, which has been shown to cause serious ecological and health risks even under trace levels, including Cd (II) and Pb (II) ions. We developed a portable sensing platform, consisting of an integrated screen-printed electrode (SPE) with the calcium/aluminum-layered double hydroxide (CaAl-LDH) nanocomposite based on carboxyl functionalized multi-walled carbon nanotubes (MWCNTs-COOH), a hand-held wireless electrochemical potentiostat and a tablet with a specially-designed app, for field simultaneous rapid detection of both Cd (Ⅱ) and Pb (Ⅱ) in water environmental sample. The CaAl-LDH was produced through a facilely hydrothermal method, and the CaAl-LDH nanocomposite with MWCNTs-COOH was prepared by a one-step ultrasonic route, which demonstrated superior sensing performance for simultaneous determination of both Cd (II) and Pb (II) with a broad detection range (2-250 μg L-1 for Cd (Ⅱ) and 5-250 μg L-1 Pb (Ⅱ)) and low limit of detection (LOD) (0.96 μg L-1 Cd (Ⅱ) and 0.74 μg L-1 for Pb (Ⅱ)). Furthermore, the proposed tablet-operated portable wireless sensing platform was utilized for detection of both Cd (II) and Pb (II) in farmland irrigation canals with acceptable recoveries.

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A flexible and disposable electrochemical sensor for the evaluation of arsenic levels: A new and efficient method for the batch fabrication of chemically modified electrodes

Cited by 23 publications

References 63 publications

Nonmodified Laser-Induced Graphene Sensors for Lead-Ion Detection

Nonmodified Laser-Induced Graphene Sensors for Lead-Ion Detection

A New Electrochemical Sensor for the Detection of Ketoconazole Using Carbon Paste Electrode Modified with Sheaf-like Ce-BTC MOF Nanostructure and Ionic Liquid

A Tablet-Operated Portable Wireless Sensing Platform for Field Simultaneous Rapid Detection of both Cd (II) and Pb (II) Using CaAl-Layered Double Hydroxide Nanocomposite Modified Integrated Screen-Printed Three-Electrode

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