Facilitated transport of halides through Nafion ionomer membrane modified with lanthanide complexes |
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| Institution: | 3. Department of Chemistry and Center of Excellence in Materials Science and Technology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand;1. Department of Materials Science and Engineering, National Chiao Tung University, Taiwan, ROC;2. Department of Electronic Engineering, Chang Gung University, Taiwan, ROC;3. Kidney Research Center, Department of Nephrology, Chang Gung Memorial Hospital, Taiwan, ROC;4. Department of Electronic Engineering, Ming Chi University of Technology, Taiwan, ROC;1. College of Nanotechnology, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand;2. Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn Universit,Bangkok 10330, Thailand;3. National Metal and Materials Technology Center, Thailand Science Park, Pathumthani 12120, Thailand;4. Nanotec-KMITL Center of Excellence on Nanoelectronic Devices, Ladkrabang, Bangkok, Thailand;5. Photonic Technology Laboratory, National Electronics and Computer Technology Center, Pathumthani 12120, Thailand;1. School of Environmental Engineering, Wuhan Textile University, Engineering Research Centre for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan, 430073, PR China;2. School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China |
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| Abstract: | Permeation of chloride and bromide through Nafion™ 117 modified with hydrophobic metal complexes of Eu3+ and Pr3+ with thenoyl trifluoro acetone (TTA), β-isopropyl tropolone (IPT) and 8-hydroxyquinoline (oxine) has been studied. The complexes were precipitated within the polymer bed with an aqueous–alcoholic solution of the reagents at a pH between 5 and 6. The permeation fluxes of the halides have been calculated by measuring the concentrations of the anions in the receiving solutions using ion chromatography. The high flux values have been attributed to the direct coordination of the inorganic anions to the central metal ions in their complexes. The chloride ion having a smaller radius and higher free energy of hydration as compared to bromide, showed higher permeation. The cations associated with the corresponding anion is also transported along with the anion. The size of the accompanying cation has a strong influence on anion permeation. |
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