Synthesis, characterization and properties of polystyrene incorporated calcium tungstate membrane and studies of its physicochemical and transport behavior

Khan, Md. Ramir; Rafi-Ud-Din, .

doi:10.1016/j.molstruc.2012.07.057

Cited by 15 publications

(5 citation statements)

References 34 publications

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“…It has indicated the surface structure, size deviation, splits, holes, color changes, brightness, decomposition etc. After such morphological examination both the composite membranes are ready to inspect the physicochemical and electrochemical examinations [23,24].…”

Section: Chemical Stabilitymentioning

confidence: 99%

“…The experimental observed potential values are represented by Table2 and also has indicated by the graphical Figure7, which shows that the potential readings are directly increases by reducing the concentration of electrolyte solutions that suggested the membrane has negative charge or totally cation selective nature. According to TMS equation the calculated potential has determined by the following equation[33].…”

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confidence: 99%

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Comparison of physicochemical and electrochemical characterization of PVC incorporated ZT and ZM composite membranes and their applicability on TMS theoretical equation

Arsalan

Zeeshan²,

Rafi-Ud-Din

2015

Journal of Molecular Structure

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Section: Chemical Stabilitymentioning

confidence: 99%

mentioning

confidence: 99%

Comparison of physicochemical and electrochemical characterization of PVC incorporated ZT and ZM composite membranes and their applicability on TMS theoretical equation

Arsalan

Zeeshan²,

Rafi-Ud-Din

2015

Journal of Molecular Structure

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“…The coinciding position on the graph gives the value of charge density of membrane which always shows D ̅ ≤1 and in this study it follows KCl>NaCl>LiCl order. Charge density depends on the early stage of material synthesis and their characteristic, and it may also indicate the above relation due to the size factor of used electrolyte solutions [45,46]. The electrochemical setup which was used to determine the ionic potential is indicated that there are two donnan potential arises at two solution and membrane interfaces, while the incubated membrane arise diffusion potential due to unequal concentration of electrolyte solutions.…”

Section: Theoriesmentioning

confidence: 99%

“…It has been calculated by obtaining the coinciding position of both the observed and theoretical potential values of used uni univalent electrolyte solutions. Related to charge density of membrane the other important parameters which included the transport number, mobility ratio and charge effectiveness have also been calculated by applying these theoretical equations [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, Electrochemical and Antibacterial Studies of Synthesized PVC Supported CP Composite

2018

AMSE

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The copper phosphate {Co 3 (PO 4 ) 2 } inorganic material has been synthesized by the sol gel method. The PVC supported CP membrane was designed by the mixing of inorganic CP and organic polyvinyl chloride (PVC) materials in 1:3 ratios of percentage. This membrane is used as a barrier for transportation of electrolyte and heavy metal ions due the charged particles on it. Due to this nature of membrane, it governs to adsorb as well as absorb characteristics of cations and anions. The structural, thermal and electrochemical characterizations were done by using different sophisticated techniques like FTIR, XRD, TGA/DTA as well as SEM-EDX, LCR and potentiometer analysis. The characterizations of material and membrane indicated the information of functional groups, material nature, thermal stability, surface structure, porosity, elemental percentages, dielectric nature, ionic transportation etc. Teorell-Meyer-Sievers (TMS) theoretical method is used to determine the charge density of membrane which is an important theory is used to analyze the performance of membrane. The other important parameters of membrane have also been determined easily by the help of obtained values of charge densities.

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“…The white precipitates of cobalt carbonate have been synthesized by sol-gel method by reacting 0.25 M cobalt (II) chloride solution with 0.25 M solution of sodium carbonate [11]. The resulting mixture is stirred well with a magnetic bar keeping the temperature constant at 80°C for 24 h until one-phase solution is formed that goes through a solution-to-gel transition.…”

Section: Synthesis Of Polystyrene Blended Cobalt Carbonate Membranesmentioning

confidence: 99%

Transport phenomena of inorganic–organic cation exchange nanocomposite membrane: a comparative study with different methods

Khan

Rafi-Ud-Din

2014

J Nanostruct Chem

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Transport studies have been carried out across a newly synthesized inorganic-organic nanocomposite membrane. Membrane potential measurements have been measured in various monovalent electrolyte environments at different concentrations to analyse the relationship between transport properties and fixed charge concentration of the membrane. The charge densities were found to follow the order K ? [ Na ? [ Li ?. The counter-ion transport number, ionic mobility ratio and permselectivity of the nanocomposite membrane have also been calculated which reveal that the inorganic-organic nanocomposite membrane shows a higher selectivity towards K ? ions; however, the selectivity decreases with decrease in dilution for all monovalent electrolytes tested. These membranes were comprehensively characterized for their physicochemical properties, morphology, molecular interactions and crystallinity by sophisticated techniques. The ionexchange capacity, volume void porosity and water uptake of the membrane were found to depend on the polystyrene content in the membrane phase and these properties decreased with increase in the amount of polymer (15-35 % by mass). Moreover, membrane containing 25 % of polystyrene exhibited good selectivity along with moderate ion-exchange capacity, which may be used for their application in electro-driven separation at high temperatures or for other electrochemical processes. Keywords Cobalt carbonate nanocomposite Á Transport number Á Permselectivity Á Physicochemical properties Á Tasaka, and Kobatake methods Á Fixed charge density List of symbols and abbreviations c 1 , c 2 Concentrations (mol/L) of the monovalent electrolyte in the lower and higher concentration sides of the membrane, respectively C Average electrolyte concentration (mol/L) SEM Scanning electron microscope XRD X-ray diffraction D Crystallite size b Full width at half-maximum (FWHM) h Diffraction angle (°) W m c Water content in terms of water concentration (mol/L) w w Wet membrane weight (g) w d Dry membrane weight (g) s m Volume void porosity of the membrane q w Density of water (g/cm 3) q d Density of the dry membrane w m Membrane potential (mV) t-app Transparent transport number of anion t m þ Counter-ion transport number in the membrane phase t ? Transport number of the cation in the solution phase

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Synthesis, characterization and properties of polystyrene incorporated calcium tungstate membrane and studies of its physicochemical and transport behavior

Cited by 15 publications

References 34 publications

Comparison of physicochemical and electrochemical characterization of PVC incorporated ZT and ZM composite membranes and their applicability on TMS theoretical equation

Comparison of physicochemical and electrochemical characterization of PVC incorporated ZT and ZM composite membranes and their applicability on TMS theoretical equation

Synthesis, Characterization, Electrochemical and Antibacterial Studies of Synthesized PVC Supported CP Composite

Transport phenomena of inorganic–organic cation exchange nanocomposite membrane: a comparative study with different methods

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