Surface studies of a chalcogenide glass ferric ion‐selective electrode Part 1: Influence of ferric and hydroxide ions on interfacial kinetics

Pejcic, Bobby; Prince, Kathryn

doi:10.1002/sia.1449

Cited by 11 publications

(25 citation statements)

References 29 publications

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“…Clearly, this points to an elaborate nanostructural network of conductive filaments -highly conductive iron doped GeSe and Sb 2 Se 3 -that are able to impart a large effect on the bulk electrical conductivity of the membrane. Of course, the previous SEM research [44] had revealed a highly interwoven network of nanofilaments at concentrations of iron above 2 at%, and atomic force microscopy (AFM) for an Fe ISE exposed to 0.01 M Fe(NO 3 ) 3 revealed a nanoporous surface structure which arises from preferential oxidative attack of the crystalline phases that are less noble relative to the surrounding glassy matrix [22].…”

Section: Resultsmentioning

confidence: 98%

“…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%

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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: 98%

Section: Resultsmentioning

confidence: 99%

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

et al. 2006

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“…A further mechanistic study of the iron(III) chalcogenide glass ISE using secondary ion mass spectrometry (SIMS), EIS and XPS in various media [108,109] suggested that chloride, hydroxide, nitrate, etc. in seawater together with ubiquitous organic ligands do not pose a serious problem for the electroanalysis of Fe 3þ in seawater, but it is necessary to condition the electrode in seawater prior to analysis, while regular recalibration, reconditioning (preferably overnight) and frequent polishing is required, if the ISEs response in seawater is to remain internally consistent with its response in iron(III) calibration standards.…”

Section: Iron(iii) In Seawatermentioning

confidence: 99%

Ion‐Selective Electrode Potentiometry in Environmental Analysis

2007

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This review will illustrate how it is possible to develop ion-selective electrode (ISE) methodologies that meet the stringent requirements (i.e., high selectivities and very low detection limits) for the analysis of important analytes in the environment, and will present a variety of examples on the application of ISEs in environmental analysis. Despite the experimental biases that have limited the analytical performance of ISEs through apparently high detection limits and modest selectivities, there has been a plethora of research in the application of ISEs in the monitoring of environmentally important trace metals and anions in natural waters and soils. Most popular has been the analysis of free metals in natural waters, as this parameter is known to be a master variable in the uptake and toxicology of trace metals on aquatic biota reflecting the bioavailability of trace metals in the environment. Furthermore, as copper is a major trace metal in coastal waters due to its extensive use in antifouling paints on sea vessels and structures, there are many reports in the literature on the use of the copper ISE in assays of either free copper or the copper complexing capacity of natural waters and soil peats. Moreover, there have been a variety of studies showing a strong correlation between free copper levels and the toxicity of copper on a variety of marine and fresh water organisms. Nevertheless, there are numerous reports in the literature that have used ISEs to monitor important anions such as fluoride, phosphate, sulfate, nitrate, nitrite, chloride, cyanide, etc., as well as other important cations such as ammonium and chromium(VI) in waste and natural waters. In conclusion, this review will present new and interesting perspectives on the application of ISEs in environmental analysis using approaches such as real-time remote monitoring of water quality, shipboard monitoring of environmentally important analytes using flow analysis instrumentation, the use of robust all-solid-state ISEs in submersible instruments for long-term deployment in the field, and innovative analytical approaches such as backside calibration and switchtrodes that avoid standard addition analysis and the concomitant perturbation in analyte speciation in natural samples.

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“…7 A recent EIS, XPS and SIMS study demonstrated that hydroxide accelerates dissolution of the chalcogenide glass via a corrosion mechanism. 8 Significantly, the formation of a mild passivation layer on the membrane surface has been shown to inhibit the charge transfer process. 8 …”

Section: Introductionmentioning

confidence: 99%

“…8 Significantly, the formation of a mild passivation layer on the membrane surface has been shown to inhibit the charge transfer process. 8 …”

Section: Introductionmentioning

confidence: 99%

Surface studies of a chalcogenide glass ferric ion‐selective electrode Part 2: The effects of inorganic ions, organic ligands and seawater on sensor response

Pejcic

Prince

2002

Surface & Interface Analysis

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X-ray photoelectron spectroscopy (XPS), secondary ion mass spectrometry (SIMS) and electrochemical impedance spectroscopy (EIS) have been used to investigate the effect of inorganic ions, organic ligands and seawater on the response of the Fe III ion-selective electrode (ISE). X-ray photoelectron spectroscopy has shown that the formation of antimony(V) oxide/hydroxide on the chalcogenide glass membrane soaked in seawater is dictated by electrode kinetics. It has been found that selenide atoms in the chalcogenide glass are replaced by oxygen in the presence of seawater. Furthermore, EIS aging studies demonstrated that the chalcogenide glass membrane experiences a sluggish charge transfer reaction in seawater. By contrast, SIMS imaging and depth profiling on various regions of a seawater-exposed membrane identified a phase comprising iron oxide-hydroxide-carbonate-carboxylate. Furthermore, SIMS revealed a uniform chemisorption of oxygen on the membrane surface, and adsorption does not appear to be related to specific coordination sites. X-ray photoelectron spectroscopy failed to detect any chloride chemisorption on the membrane surface, whereas in situ EIS showed that chloride along with hydroxide ions facilitate the charge transfer process of the Fe III ISE. Moreover, the effect of humic acid on the Fe III ISE was studied using EIS. The results of this XPS, SIMS and EIS study have enabled the derivation of a response mechanism for the Fe III ISE in seawater.

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Surface studies of a chalcogenide glass ferric ion‐selective electrode Part 1: Influence of ferric and hydroxide ions on interfacial kinetics

Abstract: X-ray photoelectron spectroscopy (XPS), secondary ion mass spectrometry (SIMS),

Cited by 11 publications

References 29 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

Ion‐Selective Electrode Potentiometry in Environmental Analysis

Surface studies of a chalcogenide glass ferric ion‐selective electrode Part 2: The effects of inorganic ions, organic ligands and seawater on sensor response

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