کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6662575 463225 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical sensor for sensitive determination of nitrite based on the PAMAM dendrimer-stabilized silver nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Electrochemical sensor for sensitive determination of nitrite based on the PAMAM dendrimer-stabilized silver nanoparticles
چکیده انگلیسی
Silver nanoparticles stabilized by PAMAM dendrimer were synthesized by a simple chemical reduction method. By this method, stable and well-distributed silver nanoparticles were formed due to the abundant terminated groups of PAMAM. Based on the Ag-PAMAM nanocomposite, a novel electrochemical sensor for the determination of nitrite was constructed. The Ag-PAMAM modified electrode exhibited excellent electrocatalytic performance for the oxidation of nitrite. The effects of pH and applied potential on the current response of Ag-PAMAM modified electrode toward nitrite were optimized to obtain the maximal sensitivity. In pH 6.0 phosphate buffer solution, the sensor displayed a wide linear range from 4.0 μM to 1.44 mM. Moreover, the sensor had the advantages of high sensitivity (265 μA mM−1 cm−2) and short response time (3 s). The detection limit was estimated to be 0.4 μM. Furthermore, the practicality of the proposed sensor for the determination of nitrite was achieved in tap water and milk sample.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volumes 717–718, 15 March 2014, Pages 29-33
نویسندگان
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