کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
637824 | 883695 | 2008 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Supramolecular membrane transport: From biomimics to membrane sensors
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
A stable, long-lived membrane sensor for dissolved oxygen is reported. A conventional amperometric Clark cell was augmented through the addition of an ion-exchange carrier to the membrane to permit export of hydroxide in exchange for chloride in the sample solution. The choice of a suitable carrier was determined from two types of supramolecular principles: (1) the characteristic flux as a function of the magnitude of the two-phase ion exchange equilibrium constant (Kex) for an antiport transport cycle as derived for biomimetic ion transport studies and (2) the use of guanidinium ion exchangers to provide hydrogen-bonding in addition to electrostatic recognition for enhanced hydroxide/chloride selectivity. The membrane of the sensor supports the anticipated ion-exchange as it continues to provide stable current beyond the point where the initial internal chloride would be entirely consumed. As a consequence, stable and responsive sensors can be fabricated using planar techniques such as screen printing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 321, Issue 1, 1 August 2008, Pages 31-36
Journal: Journal of Membrane Science - Volume 321, Issue 1, 1 August 2008, Pages 31-36
نویسندگان
T.M. Fyles, J. Lee, R.D. Rowe, G.D. Robertson,