کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
218678 463212 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Efficient synthesis of graphene–multiwalled carbon nanotubes nanocomposite and its application in electrochemical sensing of diethylstilbestrol
ترجمه فارسی عنوان
سنتز کارآمد نانوکامپوزیت نانولوله های کربنی چند منظوره گرافن و کاربرد آن در سنجش الکتروشیمیایی دی اتیلستیل بسترول
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• The ERGO–MWCNTs composites were successfully prepared using electrochemical method.
• The nanocomposites can be effectively used for the detection of DES.
• Low detection limit with wide linear range could be obtained.
• The method was applied to determine DES in real samples.

Herein, a sensitive voltammetric method for the determination of diethylstilbestrol (DES), illegally used as a growth promoter in animal husbandry, was developed using electrochemically reduced graphene oxide–multiwalled carbon nanotubes (ERGO–MWCNTs) modified electrode. The incorporated multiwalled carbon nanotubes (MWCNTs) served as electrical conducting wires, which could facilitate the electrochemical reduction of graphene oxide (GO). Compared to either electrochemically reduced graphene oxide (ERGO) or MWCNTs, integrating these nanostructures resulted in a strong synergistic effect between the two materials consequently leading to a superior hybrid material with higher activity for the electro-oxidation of DES. The electron transfer coefficient (α), the standard rate constant (ks), electrochemically effective surface area (A) and the saturating absorption capacity (Гs) were calculated. Under the optimized conditions, ERGO–MWCNTs modified electrode exhibited better linearity than either ERGO or MWCNTs over ranges from 0.01 to 40 μM with the detection limit of 3 nM (S/N = 3). Moreover, the proposed method was successfully applied to determine DES in real sample and satisfactory results were obtained. The results showed that the modified electrode exhibits an excellent catalytic activity, good sensitivity and reproducibility.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 731, 1 October 2014, Pages 84–92
نویسندگان
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