Synthesis and characterization of graphene quantum dots/CoNiAl-layered double-hydroxide nanocomposite: Application as a glucose sensor
Autor: | Sara Samuei, Ashkan Shomali, Jila Fakkar, Biuck Habibi, Zolfaghar Rezvani |
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Rok vydání: | 2017 |
Předmět: |
Thermogravimetric analysis
Materials science Biophysics Analytical chemistry Biosensing Techniques 02 engineering and technology 010402 general chemistry 01 natural sciences Biochemistry Nanocomposites law.invention X-Ray Diffraction law Quantum Dots Hydroxides Humans Fourier transform infrared spectroscopy Electrodes Molecular Biology Nanocomposite L-Lactate Dehydrogenase Graphene Electrochemical Techniques Cell Biology Chronoamperometry 021001 nanoscience & nanotechnology Carbon 0104 chemical sciences Glucose Metals Quantum dot Electrode Microscopy Electron Scanning Graphite Cyclic voltammetry 0210 nano-technology |
Zdroj: | Analytical Biochemistry. 521:31-39 |
ISSN: | 0003-2697 |
DOI: | 10.1016/j.ab.2017.01.005 |
Popis: | 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. |
Databáze: | OpenAIRE |
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