A diamond/graphite nanoplatelets electrode for anodic stripping voltammetric trace determination of Zn(II), Cd(II), Pb(II) and Cu(II)

Zhai, Zhaofeng; Huang, Nan; Zhuang, Hao; Liu, Lusheng; Yang, Bing; Wang, Chun; Gai, Zheng; Guo, Fengxiang; Li, Zhengjun; Jiang, Xin

doi:10.1016/j.apsusc.2018.06.266

Cited by 61 publications

(31 citation statements)

References 57 publications

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“…8 and 9 . Notwithstanding a noticeable decrease of the anodic current peak, the initial potential became a more negative potential than − 0.90 V. This was due to the evolution of hydrogen ions as the initial potential became more negative 37 . Therefore, the initial potential used in the study was determined to be − 0.90 V for the detection of Pb.…”

Section: Resultsmentioning

confidence: 92%

Highly sensitive determination of heavy metals in water prior to and after remediation using Citrofortunella Microcarpa

Palisoc

Vitto

Noel

et al. 2021

Sci Rep

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A highly sensitive bismuth/silver nanoparticles/Nafion-modified screen-printed graphene electrode was fabricated and was utilized for the detection of trace lead (Pb) concentrations in river water samples prior to and after remediation using calamansi (Citrofortunella Microcarpa) rinds in different forms viz., ground sun-dried, dry-ashed, food-grade pectin, fractionated pectin, and alcohol insoluble solids—extracted pectin. All these forms of pectin remediated Pb in the water samples. Hence, this novel method of using calamansi rinds in different forms is an effective method for the removal of lead in water. The electrode was characterized using scanning electron microscopy and energy dispersive x-ray spectrometry which confirmed the presence of the modifiers on the electrode surface. The limit of detection of 267.6 ppt and the strong linear relationship between the Pb concentration and the anodic current response (R2 = 0.999) were obtained under optimized experimental conditions and parameters.

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Section: Resultsmentioning

confidence: 92%

Highly sensitive determination of heavy metals in water prior to and after remediation using Citrofortunella Microcarpa

Palisoc

Vitto

Noel

et al. 2021

Sci Rep

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“…The applied initial potential was varied at −0.84 V, −0.86 V, −0.88 V, −0.90 V, and −0.92 V. The deposition time was held constant at 90 s, the rest period at 60 s, and the scan rate at 0.1 V/s. Figure 2 shows that the anodic current peaks for both Cd and Pb increased as the initial potential was decreased from −0.84 V to −0.88 V, while a significant decrease in the response of the anodic current peaks were observed when the initial potential reached a potential more negative than −0.88 V. This phenomenon could be ascribed to the evolution of hydrogen ions as the initial potential became more negative 61 . Therefore, the potential of −0.88 V was considered to be the optimum initial potential in this study.…”

Section: Resultsmentioning

confidence: 97%

Determination of Heavy Metals in Herbal Food Supplements using Bismuth/Multi-walled Carbon Nanotubes/Nafion modified Graphite Electrodes sourced from Waste Batteries

Palisoc

Vitto

Natividad

2019

Sci Rep

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An electrochemical sensor based on graphite electrode extracted from waste zinc-carbon battery is developed. The graphite electrode was modified with bismuth nanoparticles (BiNP), multi-walled carbon nanotubes (MWCNT) and Nafion via the drop coating method. The bare and modified graphite electrodes were used as the working electrode in anodic stripping voltammetry for the determination of trace amounts of cadmium (Cd2+) and lead (Pb2+). The modified electrode exhibited excellent electroanalytical performance for heavy metal detection in comparison with the bare graphite electrode. The linear concentration range from 5 parts per billion (ppb) to 1000 ppb (R2 = 0.996), as well as detection limits of 1.06 ppb for Cd2+ and 0.72 ppb for Pb2+ were obtained at optimized experimental conditions and parameters. The sensor was successfully utilized for the quantification of Cd2+ and Pb2+ in herbal food supplement samples with good agreement to the results obtained by atomic absorption spectroscopy. Thus, the BiNP/MWCNT/Nafion modified graphite electrode is a cost-effective and environment-friendly sensor for monitoring heavy metal contamination.

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“…The limits of detection (LOD) were measured as 0.95 μg L -1 and 1.84 μg L -1 for the Cd (II) and Pb (II) ions, respectively, which demonstrates the high sensitivity of the modi ed polymer electrode towards heavy metal ion detection. The separation in peaks locations for metal ions offer an accurate strategy to detect Cd (II) and Pb (II) ions, signi cantly reducing interfering effects from other heavy metal ions [44,45].…”

Section: The Determination Of CD (Ii) and Pb (Ii) Ionsmentioning

confidence: 99%

An electrochemical detection of cadmium (II) and lead (II) ions using a polymer-modified electrode with a Schiff base by square wave voltammetry

Mohammed

Ismail²,

Alesary³

et al. 2021

Preprint

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The work herein concentrates on the electrochemical detection of heavy metal ions, specifically cadmium and lead ions. The introduction and modification of functional groups such as Schiff bases had led to an enhanced sensitivity of the electrode to analytes. In this study, a platinum electrode has for the first time been modified with poly(3,4- ethylenedioxythiophene) (PEDOT/Schiff base) in CH2Cl2 containing Bu4NPF6 for use to detection cadmium (II) and lead (II) ions. The structure and morphology of the polymer coatings were characterised by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM), respectively. The electrochemical synthesis and redox state response in monomer-free synthesised films have been studied by cyclic voltammetry. Moreover, the effect of scan rate on the electrochemical behaviour of the modified electrodes was also studied. The voltammetric findings have been used to calculate the surface coverage required for the polymer films and the stability of polymer electrodes in the monomer-free solutions. Square wave voltammetry (SWV) was applied for the determination of cadmium (II) and lead (II) ion concentrations and to assess the effects of pH on aqueous samples. The limits of detection for the modified electrode for cadmium (II) and lead (II) were found to be 0.95 μg L-1 and 1.84 μg L-1, respectively. These findings revealed that modified films can be considered good candidates for application in electrochemical detection devices

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A diamond/graphite nanoplatelets electrode for anodic stripping voltammetric trace determination of Zn(II), Cd(II), Pb(II) and Cu(II)

Cited by 61 publications

References 57 publications

Highly sensitive determination of heavy metals in water prior to and after remediation using Citrofortunella Microcarpa

Highly sensitive determination of heavy metals in water prior to and after remediation using Citrofortunella Microcarpa

Determination of Heavy Metals in Herbal Food Supplements using Bismuth/Multi-walled Carbon Nanotubes/Nafion modified Graphite Electrodes sourced from Waste Batteries

An electrochemical detection of cadmium (II) and lead (II) ions using a polymer-modified electrode with a Schiff base by square wave voltammetry

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