Impedance measurements of a chalcogenide membrane iron(III)-selective electrode in contact with aqueous electrolytes

Pejcic, Bobby

doi:10.1016/j.electacta.2004.03.029

Cited by 14 publications

(13 citation statements)

References 44 publications

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“…Clearly, the diminution in these conductive phases from the MSLs of the ISEs is expected to passivate the electrodes, severely destroying their response attributes, as has been observed elsewhere if the iron chalcogenide glass ISE is allowed to age continuously in seawater [33].…”

Section: Resultsmentioning

confidence: 96%

“…A reaction model, which is depicted by the cartoon in Figure 2, can be derived by reconciling the previously published data on the reactivity [33], response attributes [8,10,45] as well as SANS, SEM and AFM nanostructural information on the MSL [22,43,44] of the iron chalcogenide glass ISE. Initially, the iron doped nanocrystalline inclusions of GeSe and Sb 2 Se 3 (shown as white oval-like rods in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Early work by various groups helped to establish the foundations for impedance spectroscopy, and used it to study the interfacial and bulk conduction processes on a wide range of ISEs [24 -32]. Recently, a detailed study of the electrode dynamics of the iron chalcogenide glass ISE [33] demonstrated the power of EIS in studying the MSL of this class of ISEs.…”

Section: Introductionmentioning

confidence: 99%

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Response Mechanisms and New Approaches with Solid‐State Ion‐Selective Electrodes: A Powerful Multitechnique Materials Characterization Approach

et al. 2006

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In modern materials science, there is a plethora of characterization techniques of materials that can provide valuable insights into the fundamental chemical physics of solid-state devices such as chalcogenide glass ion-selective electrodes (ISEs). In this paper, electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectrometry (XPS) and secondary ion mass spectrometry (SIMS) have been used in the elucidation of the mechanistic chemistry of the cadmium chalcogenide glass ISE. Furthermore, in situ synchrotron radiation-grazing incidence X-ray diffraction (SR-GIXRD), in situ EIS/SR-GIXRD, along with small angle neutron scattering (SANS), can be used to unravel the complex relationship between the nanostructure, bulk electrical conductivity and concomitant electrochemical reactivity of an iron chalcogenide glass ISE. Significantly, exciting preliminary modified atomic force microscopy (AFM) data -utilizing AFM cantilevers with attached microparticles of the copper sensing material jalpaitedemonstrate the tremendous potential of selective force ISE-AFM in the imaging of important molecular structures such as the copper ion channels of cell membranes in fish gills and/or phytoplankton.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Response Mechanisms and New Approaches with Solid‐State Ion‐Selective Electrodes: A Powerful Multitechnique Materials Characterization Approach

et al. 2006

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“…It was shown that the physical and chemical condition of the membrane surface has a profound influence on the reactivity of the Fe 3+ ISE [28,29]. The long-term aging of the Fe 2.5 (Se 60 Ge 28 Sb 12 ) 97.5 membrane in saline and alkaline electrolytes has a tendency to destroy the surface structure of the sensor [31]. More importantly, a film forms on the surface of the membrane under alkaline conditions, and it was proposed that it comprises a gelatinous iron(III) hydroxide/oxide film [31].…”

Section: Introductionmentioning

confidence: 98%

In situ synchrotron radiation grazing incidence X-ray diffraction—A powerful technique for the characterization of solid-state ion-selective electrode surfaces

Jiang¹,

Pejcic²,

Riessen³

2006

Electrochimica Acta

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“…Regarding its industrial use, iron and its compounds have numerous important industrial applications. However, despite the urgent need for iron-selective sensors for the potentiometric monitoring of Fe 3? ions in chemical, biological, industrial, and environmental samples, very little work has been done on the development of potentiometric sensors for iron ion [9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of an iron(III)-selective PVC membrane sensor based on a bis-bidentate Schiff base ionophore

Zamani

Salavati‐Niasari

2008

Transition Met Chem

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A Fe 3? ion-selective membrane sensor was fabricated from polyvinyl chloride (PVC) matrix membrane containing bis-bidentate Schiff base (BBS) as a neutral carrier, sodium tetraphenyl borate (NaTPB) as anionic excluder, and o-nitrophenyloctyl ether (NPOE) as a plasticizing solvent mediator. The effects of the membrane composition, pH, and additive anionic influence on the response properties were investigated. The best performance was obtained with a membrane containing 32% PVC, 62.5% NPOE, 3% BBS, and 2.5% NaTPB. The electrode shows a Nernstian behavior (slope of 19.3 ± 0.6) over a very wide iron ion concentration range (1.0 9 10 -7 -1.0 9 10 -2 M) and has a low detection limit (7.4 9 10 -8 M). The potentiometric response of the sensor is independent of pH of the solution in the pH range 1.9-5.1. The proposed sensor has a very low response time (\15 s) and a good selectivity relative to a wide variety of other metal ions including common alkali, alkaline earth, heavy, and transition metal ions. The electrode can be used for at least 60 days without any considerable divergence in potentials. The proposed sensor was successfully applied as an indicator electrode for the potentiometric titration of 1.0 9 10 -2 M Fe 3? ions with a 1.0 9 10 -4 M EDTA and the direct determination of Fe 3? in mineral water and wastewater samples.

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Impedance measurements of a chalcogenide membrane iron(III)-selective electrode in contact with aqueous electrolytes

Cited by 14 publications

References 44 publications

Response Mechanisms and New Approaches with Solid‐State Ion‐Selective Electrodes: A Powerful Multitechnique Materials Characterization Approach

Response Mechanisms and New Approaches with Solid‐State Ion‐Selective Electrodes: A Powerful Multitechnique Materials Characterization Approach

In situ synchrotron radiation grazing incidence X-ray diffraction—A powerful technique for the characterization of solid-state ion-selective electrode surfaces

Fabrication of an iron(III)-selective PVC membrane sensor based on a bis-bidentate Schiff base ionophore

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