Review—New Generation Electrode Materials for Sensitive Detection

Jain, Rajeev; Jadon, Nimisha; Singh, Kshiti

doi:10.1149/2.0251603jes

Cited by 27 publications

(10 citation statements)

References 192 publications

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“…The wide electrochemical potential window represents the stable electrochemical properties and mainly depends on the reduction resistance of cations and the oxidation resistance of anions. 53 Conductivity is a measured value indicating the ability of a material to transmit electrons. Generally, high conductivity is accompanied by high liquid density, low viscosity, small ionic size, high mobility, etc.…”

Section: Physicochemical Properties Of Ilsmentioning

confidence: 99%

Ionic liquids revolutionizing biomedicine: recent advances and emerging opportunities

Hu,

Xing,

Yue

et al. 2023

Chem. Soc. Rev.

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Section: Physicochemical Properties Of Ilsmentioning

confidence: 99%

Ionic liquids revolutionizing biomedicine: recent advances and emerging opportunities

Hu,

Xing,

Yue

et al. 2023

Chem. Soc. Rev.

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“…More robust conductivity sensors have also been proposed for the soil salinity analysis, based on the dielectric properties of the matrix [27]. Promising results have also been obtained with bare and modified amperometric elec-trodes, which allow to analyze different species that impact the environment and the health of dependent organisms, even at very low concentrations [28][29][30][31]. Unfortunately, few reports were focused on Na + electroanalysis, reinforcing the need for novel elec-trochemical devices for this purpose.…”

Section: Considering That Surface-modified Electrodes Based On Niox-fmentioning

confidence: 99%

Sensor based on β - NiOx hybrid film/multi-walled carbon nanotubes composite electrode for groundwater salinization inspection

Firmino

Morais

Correia

et al. 2017

Chemical Engineering Journal

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The enrichment of groundwater with different nutrients (Na + , Ca 2+ , Mg 2+ , Cl − , CO3 2− , among others) triggers the salinization of the aquifer and makes it inappropriate for many purposes. In this work, we developed a highly sensitive and selective electrochemical sensor, based on Ni-inorganic films electrosynthetized in situ onto multiwalled carbon nanotubes composite paste electrode (MWCNE), which allows the early detection of salinization. The working sensor (β-NiOx/MWCNE) was derivatized from nickel hexacyanoferrate modified electrode in strong alkaline medium (pH = 12), producing a hybrid film composed by β-Ni(OH)2and β-NiO(OH). The electrochemical properties, morphology and chemical composition of the formed β-NiOx thin films were evaluated by voltammetry, scanning electron microscopy and X-ray spectroscopy. The developed β-NiOx/MWCNE sensor was highly sensitive to the presence of Na + cation by ion-exchange, and the increase of Na + concentration in the range 4.46 × 10 −7 to 4.93 × 10 −6 mol L −1 inhibited linearly the reversible electrochemical signal of the device, allowing to determine trace concentrations of this ion (LOD = 9.86 × 10 −8 mol L −1) with high correlation coefficient of the data (r = 0.999) and suitable precision/reproducibility of the measurements (RSD < 9%). Using Na + as salinization marker and β-NiOx/MWCNE as electroanalytical device, we found evidences of groundwater salinization in Grossos, a Brazil coast city, whose inhabitants have hypertension above the national average. The attained results were comparable to those obtained by the standard methods for Na + analysis (percentage error ranging from 0.5 to 1.6%), confirming the accuracy of the proposed electroanalytical platform.

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“…Although there are plenty of possible RTILs that could be used as binders or additives for CPEs, only a few have been used so far [28]. Most of them are imidazolium or pyridinium ILs, while hexafluorophosphate ([PF 6 ] À ) or tetrafluoroborate ([BF 4 ] À ) have been the anions of choice for most of the IL-modified CPE works in the literature.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ionic Liquid Structure on the Electrochemical Response of Dopamine at Room Temperature Ionic Liquid‐modified Carbon Paste Electrodes (IL–CPE)

2020

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In this work 12 different ionic liquids (ILs) have been used added as co‐binders in the preparation of modified carbon paste electrodes (IL–CPEs) used for the voltammetric analysis of dopamine in Britton‐Robinson buffer. The ionic liquids studied were selected based on three main criteria: (1) increasing chain length of alkyl substituents (studying 1‐ethylimidazolium and ethyl, propyl, butyl, hexyl and decylmethylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquids); (2) nature of the counter ion (dicyanamide, bis(trifluoromethylsulfonyl)imide and hexafluorophosphate) in 1‐butyl‐3‐methylimidazolium ionic liquids; and (3) cation ring structures (1‐butyl‐3‐methylimidazolium, 1‐butyl‐1‐methylpiperidinium, 1‐butyl‐1‐methylpyrrolidinium and 1‐butyl‐3‐methylpyridinium) in bis(trifluoromethylsulfonyl)imide or hexafluorophosphate (1‐butyl‐3‐methylimidazolium or 1‐butyl‐3‐methylpyridinium as cations) ionic liquids. The use of IL as co‐binders in IL–CPE results in a general enhancement of both the sensitivity and the reversibility of dopamine oxidation. In square wave voltammetry experiments, the peak current increased up to a 400 % when 1‐ethyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide was used as co‐binder, as compared to the response found with the unmodified CPE. Experimental data provide evidence that electrostatic and steric effects are the most important ones vis‐à‐vis these electrocatalytic effects on the anodic oxidation of dopamine on IL–CPE. The relative hydrophilicity of dicyanamide anions reduced the electrocatalytic effects of the corresponding ionic liquids, while the use of 1‐ethyl‐3‐methylimidazolium hexafluorophosphate or 1‐ethyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide (two relatively small and highly hydrophobic ionic liquids) as co‐binders in IL–CPE resulted in the highest electrocatalytic activity among all of the IL–CPE studied.

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Review—New Generation Electrode Materials for Sensitive Detection

Cited by 27 publications

References 192 publications

Ionic liquids revolutionizing biomedicine: recent advances and emerging opportunities

Ionic liquids revolutionizing biomedicine: recent advances and emerging opportunities

Sensor based on β - NiOx hybrid film/multi-walled carbon nanotubes composite electrode for groundwater salinization inspection

Effect of Ionic Liquid Structure on the Electrochemical Response of Dopamine at Room Temperature Ionic Liquid‐modified Carbon Paste Electrodes (IL–CPE)

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