Determination and theoretical evaluation of selectivity coefficients of monovalent anions in anion-exchange polymer inclusion membrane

Sodaye, S.; Suresh, G.; Pandey, Ashok K.; Goswami, A.

doi:10.1016/j.memsci.2007.02.044

Cited by 56 publications

(38 citation statements)

References 24 publications

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“…The standard deviation of 2 τ and δ values obtained from the curve fitting remained less than 10% and the error in and T was maintained less than 5%. Based on this, the error limit of the n and µ values obtained in this method is estimated to be within ±20%.…”

Section: Evaluation Of Mobility Diffusion Coefficient and Density Ofmentioning

confidence: 87%

“…It is noteworthy that the relaxation time 2 τ correspond to the frequency where the dc resistance is obtained from complex impedance plots and thus the real part of the impedance and the frequency dependence of the conductivity remains relatively unchanged close to this frequency, for an example, see can be used and in case both cations and anions are mobile, an effective D value may be used [17,18]. Anyhow, by using equation (18) one can obtain;…”

Section: Impedance and Impedance Analysismentioning

confidence: 99%

“…Figure 20 shows the graph of imaginary part of the complex impedance Z´´ against the real part Z´ for 3×10 -4 M solution at different temperatures. The relaxation time, 2 , was obtained from the frequency corresponding to the minimum in Z´´ shown in Figure 20. This 2 value coincides with the frequency of the maximum in tanφ as described in the theory section.…”

Section: D N and μ In 1-butyl-1-methylpyrrollidinum Bis(tryfluorometmentioning

confidence: 99%

“…Ionic conductors are key components for many electrochemical applications, mainly in the field of energy conversion, for example, in photo-electrochemical (PEC) solar cells and fuel cells, in energy storage devices like batteries and in other technological applications like electro-chromic devices, super-capacitors, electrochemical sensors [1,2], separation membranes [3], new types of memory and computer architecture as well as in biomedical applications [4,5]. In the last few decades ionic conductors have gained a revolutionary development owing to intense research inspired by their potential use in many electrochemical device applications.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Evaluation of Mobility, Diffusion Coefficient and Density of Charge Carriers in Ionic Liquids and Novel Electrolytes Based on a New Model for Dielectric Response

Bandara¹,

Mellander²

2011

Ionic Liquids: Theory, Properties, New Approaches

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Section: Evaluation Of Mobility Diffusion Coefficient and Density Ofmentioning

confidence: 87%

Section: Impedance and Impedance Analysismentioning

confidence: 99%

Section: D N and μ In 1-butyl-1-methylpyrrollidinum Bis(tryfluorometmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of Mobility, Diffusion Coefficient and Density of Charge Carriers in Ionic Liquids and Novel Electrolytes Based on a New Model for Dielectric Response

Bandara¹,

Mellander²

2011

Ionic Liquids: Theory, Properties, New Approaches

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“…Anionic conductors are important not only for DSSCs but also for other electrochemical applications such as electrochromic devices and separation processes, which are also less studied [15,17]. Further, anionconducting solid polymer electrolytes are suitable for supercapacitors as well [18].…”

Section: Introductionmentioning

confidence: 99%

Electrical and complex dielectric behaviour of composite polymer electrolyte based on PEO, alumina and tetrapropylammonium iodide

Bandara

Karunathilaka

Ratnasekera

et al. 2017

Ionics

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In this study, the electrical, dielectric and morphological analysis of composite solid polymer electrolytes containing polyethylene oxide, alumina nano-fillers and tetrapropylammonium iodide are conducted. The temperature dependence of conductivity shows activation energy of 0.23, 0.20 and 0.29 eV for electrolytes containing 0, 5 and 15 wt.% alumina, respectively, when data fitted to the Arrhenius equation. These activation energy values are in good agreement with those determined from dielectric measurements. The result confirms the fact that conductivity is activated by both the mobility and the charge carrier density. The conductivity isotherms demonstrated the existence of two peaks, at 5 and 15 wt.% Al 2 O 3 composition. The highest conductivity values of 2.4 × 10 −4 , 3.3 × 10 −4 and 4.2 × 10 −4 S cm −1 are obtained for the sample with 5 wt.% Al 2 O 3 at 0, 12 and 24°C, respectively, suggesting an enhancement of conductivity compared with that of alumina free samples.

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Molecular iodine selective membrane for iodate determination in salt samples: chemical amplification and preconcentration

et al. 2008

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A molecular iodine selective membrane has been used for preconcentration of I(2) generated in situ by iodometric reaction of IO(3)(-) with excess I(-) in acidic medium (pH 1-2). This iodometric reaction amplifies the iodine content six times resulting in enhancement of analytical response ranging from three times for molecular methods to six times for elemental methods. The chemical conditions of this iodometric reaction were optimized for quantitative generation and subsequent sorption of I(2) in the membrane samples (96 +/- 3%). The homogeneous transparent membrane was prepared by immobilizing I(2)-complexing polyvinylpyrrolidone (PVP) in the plasticized cellulose triacetate matrix. Four different analytical methods were examined for quantitative determination of IO(3)(-) in iodized salt samples by preconcentrating it as I(2) in the membrane matrix. These methods were: (1) spectrophotometry of the PVP-I(2) complex formed in the membrane matrix, (2) a radiotracer method using I(-) tagged with (131)I radiotracer, (3) instrumental neutron activation analysis (INAA), and (4) energy-dispersive X-ray fluorescence (EDXRF) analysis. The IO(3)(-) contents thus determined in the iodized salt samples by the membrane-based radiotracer method were compared with the total iodine determined in salt samples by epithermal instrumental neutron activation analysis (EINAA). The membrane-based method for iodate determination in salt samples has advantages over conventional analytical methods, for example preconcentration and chemical amplification, and is free from interference from anions.

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Determination and theoretical evaluation of selectivity coefficients of monovalent anions in anion-exchange polymer inclusion membrane

Cited by 56 publications

References 24 publications

Evaluation of Mobility, Diffusion Coefficient and Density of Charge Carriers in Ionic Liquids and Novel Electrolytes Based on a New Model for Dielectric Response

Evaluation of Mobility, Diffusion Coefficient and Density of Charge Carriers in Ionic Liquids and Novel Electrolytes Based on a New Model for Dielectric Response

Electrical and complex dielectric behaviour of composite polymer electrolyte based on PEO, alumina and tetrapropylammonium iodide

Molecular iodine selective membrane for iodate determination in salt samples: chemical amplification and preconcentration

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