کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7869793 | 1509175 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of a sensitive and selective copper optode based on β-ketoimine modified calix[4]arene derivative
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
بیومتریال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this paper, an optical sensor was proposed for sensitive determination of copper (II) ions in aqueous solution. The sensing membrane was prepared by coating β-ketoimine calix[4]arene derivative as ionophore on a glass plate surface. Thin β-ketoimine calix[4]arene layer was characterized by contact angle measurements showing a good surface coverage. Besides, a smooth and homogeneous morphology of the calixarene membrane was examined by atomic force microscopy (AFM). The response of the optode is based on the decrease in the absorbance signal at 309 nm upon exposure to buffer solutions containing Cu2 + ions. At a pH 6.8, the proposed sensor displays a calibration response for copper over a wide concentration range of 1.0 Ã 10â 7 M to 1.0 Ã 10â 4 M with a detection limit of 2.0 Ã 10â 8 M and response time of 7-10 min. This optode exhibits good selectivity toward copper ions in comparison with common ions including Hg2 + and Ag+ ions. The copper sensing film can be regenerated using 0.01 M HNO3 solution. In addition to its high stability, repeatability and reproducibility, the sensor shows operational life time of 4 weeks.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: C - Volume 46, 1 January 2015, Pages 125-131
Journal: Materials Science and Engineering: C - Volume 46, 1 January 2015, Pages 125-131
نویسندگان
A. Rouis, M. Echabaane, N. Sakly, I. Bonnamour, H. Ben Ouada,