کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
744348 1462084 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multiwall carbon nanotubes-poly(diallyldimethylammonium chloride)-graphene hybrid composite film for simultaneous determination of catechol and hydroquinone
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Multiwall carbon nanotubes-poly(diallyldimethylammonium chloride)-graphene hybrid composite film for simultaneous determination of catechol and hydroquinone
چکیده انگلیسی


• PDDA maintains electronic structure of GR and MWCNTs and prevents GR coagulation.
• MWCNTs-PDDA-GR owns high surface area, excellent catalytic activity and conductivity.
• MWCNTs-PDDA-GR/GCE exhibits good sensitivity, selectivity and reproducibility toward HQ and CC.

A multiwall carbon nanotubes-poly(diallyldimethylammonium chloride)-graphene modified glassy carbon electrode (MWCNTs-PDDA-GR/GCE) has been fabricated and used for simultaneous determination of catechol (CC) and hydroquinone (HQ). Transmission electron microscopy (TEM) and electrochemical impedance spectroscopy (EIS) results revealed that MWCNTs-PDDA-GR was successfully prepared with enhanced electron transfer ability. Differential pulse voltammetry (DPV) results showed that MWCNTs-PDDA-GR/GCE exhibited an excellent electrochemical performance, two correspondingly well-defined oxidation peaks with significantly different peak potentials (120 mV) and enhanced peak currents appeared at the modified electrode. Under the optimized conditions, the sensing platform showed wide linear responses for HQ and CC from 5.0 × 10−7 to 4.0 × 10−4 mol L−1 with detection limits (S/N = 3) of 2.0 × 10−8 mol L−1 and 1.8 × 10−8 mol L−1, respectively. The proposed MWCNTs-PDDA-GR/GCE proved successful toward the sensitive and simultaneous detection of HQ and CC in practical water samples.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 206, January 2015, Pages 111–118
نویسندگان
, , , , , , , , , ,