کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1163130 1490933 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly selective and sensitive simple sensor based on electrochemically treated nano polypyrrole-sodium dodecyl sulphate film for the detection of para-nitrophenol
ترجمه فارسی عنوان
حسگر ساده بسیار حساس و حساس بر اساس فیلم الکتروشیمیایی نانو پلی پریرول سدیم دودسیل سولفات برای تشخیص پاراویتروفنل
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• An electrochemically treated nano polypyrrole/sodium dodecyl sulphate film modified glassy carbon electrode was prepared and applied for determination of p-NP.
• A very good linear detection range (from 0.1 nM to 100 μM) was obtained.
• The best LOD (0.1 nM) of p-NP was obtained, without any interference.

An ultrasensitive and highly selective electrochemical sensor for the determination of p-nitrophenol (p-NP) was developed based on electrochemically treated nano polypyrrole/sodium dodecyl sulphate film (ENPPy/SDS film) modified glassy carbon electrode. The nano polypyrrole/sodium dodecyl sulphate film (NPPy/SDS film) was prepared and treated electrochemically in phosphate buffer solution. The surface morphology and elemental analysis of treated and untreated NPPy/SDS film were characterized by FESEM and EDX analysis, respectively. Wettability of polymer films were analysed by contact angle test. The hydrophilic nature of the polymer film decreased after electrochemical treatment. Effect of the pH of electrolyte and thickness of the ENPPy/SDS film on determination of p-NP was optimised by cyclic voltammetry. Under the optimised conditions, the p-NP was determined from the oxidation peak of p-hydroxyaminophenol which was formed from the reduction of p-NP in the reduction segment of cyclic voltammetry. A very good linear detection range (from 0.1 nM to 100 μM) and the best LOD (0.1 nM) were obtained for p-NP with very good selectivity. This detection limit is below to the allowed limit in drinking water, 0.43 μM, proposed by the U.S. Environmental Protection Agency (EPA) and earlier reports. Moreover, ENPPy/SDS film based sensor exhibits high sensitivity (4.4546 μA μM−1) to p-NP. Experimental results show that it is a fast and simple sensor for p-NP.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 899, 29 October 2015, Pages 66–74
نویسندگان
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