کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5131632 1491326 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and characterization of graphene quantum dots/CoNiAl-layered double-hydroxide nanocomposite: Application as a glucose sensor
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Synthesis and characterization of graphene quantum dots/CoNiAl-layered double-hydroxide nanocomposite: Application as a glucose sensor
چکیده انگلیسی


- The GQDs/CoNiAl-LDH nanocomposite as a novel material was synthesized by an effective and low-cost synthesis process.
- The GQDs/CoNiAl-LDH nanocomposite was used to fabricate a glucose electrochemical sensor.
- The present sensor has fast amperometric response, low detection limit, wide linear ranges and high sensitivity to glucose..

In the present work, a novel nanocomposite based on the graphene quantum dots and CoNiAl-layered double-hydroxide was successfully synthesized by co-precipitation method. To achieve the morphological, structural and compositional information, the resulted nanocomposite was characterized by scanning electron microscopy X-ray diffraction, thermal gravimetric analysis, Fourier transform infrared spectroscopy, and photoluminescence. Then, the nanocomposite was used as a modifier to fabricate a modified carbon paste electrode as a non-enzymatic sensor for glucose determination. Electrochemical behavior and determination of glucose at the nanocomposite modified carbon paste electrode were investigated by cyclic voltammetry and chronoamperometry methods, respectively. The prepared sensor offered good electrocatalytic properties, fast response time, high reproducibility and stability. At the optimum conditions, the constructed sensor exhibits wide linear range; 0.01-14.0 mM with a detection limit of 6 μM (S/N = 3) and high sensitivity of 48.717 μAmM−1. Finally, the sensor was successfully applied to determine the glucose in real samples which demonstrated its applicability.

Proposed structure of GQDs/CoNiAl-LDH nanocomposite.168

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytical Biochemistry - Volume 521, 15 March 2017, Pages 31-39
نویسندگان
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