کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1163250 1490936 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Molecularly imprinted ultrathin graphitic carbon nitride nanosheets–Based electrochemiluminescence sensing probe for sensitive detection of perfluorooctanoic acid
ترجمه فارسی عنوان
نانوذرات کربن گرافیتی مونوکرومتری، نانوذرات سنجش الکتروشیمیومیومسنس را برای تشخیص حساس پراکسلوروککتنیک اسید
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• A highly sensitive ECL sensor for rapid detection of PFOA developed.
• As-prepared sensor fabricated by MIP modified utg-C3N4 nanosheets.
• Unique ECL properties of MIP modified utg-C3N4 nanosheets explored.
• The first smart integration of utg-C3N4 with MIP yielding a novel ECL sensing probe.
• The resulting sensor exhibiting fine applicability for detection of PFOA in real samples.

Driven by the urgent demand for the determination of low level perfluorooctanoic acid (PFOA) present in environment, a novel electrochemiluminescence (ECL) sensor has been first developed for the detection of PFOA using the molecularly imprinted polypyrrole modified two-dimensional ultrathin g-C3N4 (utg-C3N4) nanosheets as a cathodic ECL emitter with S2O82− as coreactant. The prepared molecularly imprinted polymer (MIP) functionalized utg-C3N4 nanosheets (MIP@utg-C3N4) exhibit a stable and significantly amplified ECL signal. It is found that the targets of PFOA could be efficiently oxidized by the electro-generated strong oxidants of SO4− (from the reduction of coreactant S2O82−), thus leading to a low yield of the excited utg-C3N4 (g-C3N4*) and finally a decrease in ECL signal. Based on this, a highly sensitive and selective MIP@utg-C3N4-based signal-off ECL sensor is developed for sensing PFOA. Such a newly designed ECL sensor exhibits highly linear over the PFOA concentration in two ranges, from 0.02 to 40.0 ng mL−1 and 50.0–400.0 ng mL−1. The detection limit (S/N = 3) is estimated to be 0.01 ng mL−1 (i.e. 0.01 ppb), comparable to the results obtained by using well-established liquid chromatography-tandem mass spectrometry (LC-MS/MS). Toward practical applications, this low-cost and sensitive assay was successfully applied to measure PFOA in real water samples, showing fine applicability for the detection of PFOA in real samples.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 896, 8 October 2015, Pages 68–77
نویسندگان
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